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#1222794 by gapple, jhodgdon: Fixed drupal_add_css() support for stream...
Angie Byron authored
Issue #1222794 by gapple, jhodgdon: Fixed drupal_add_css() support for stream wrappers not documented.
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common.inc 284.12 KiB
<?php
/**
* @file
* Common functions that many Drupal modules will need to reference.
*
* The functions that are critical and need to be available even when serving
* a cached page are instead located in bootstrap.inc.
*/
/**
* @defgroup php_wrappers PHP wrapper functions
* @{
* Functions that are wrappers or custom implementations of PHP functions.
*
* Certain PHP functions should not be used in Drupal. Instead, Drupal's
* replacement functions should be used.
*
* For example, for improved or more secure UTF8-handling, or RFC-compliant
* handling of URLs in Drupal.
*
* For ease of use and memorizing, all these wrapper functions use the same name
* as the original PHP function, but prefixed with "drupal_". Beware, however,
* that not all wrapper functions support the same arguments as the original
* functions.
*
* You should always use these wrapper functions in your code.
*
* Wrong:
* @code
* $my_substring = substr($original_string, 0, 5);
* @endcode
*
* Correct:
* @code
* $my_substring = drupal_substr($original_string, 0, 5);
* @endcode
*
* @}
*/
/**
* Return status for saving which involved creating a new item.
*/
define('SAVED_NEW', 1);
/**
* Return status for saving which involved an update to an existing item.
*/
define('SAVED_UPDATED', 2);
/**
* Return status for saving which deleted an existing item.
*/
define('SAVED_DELETED', 3);
/**
* The default group for system CSS files added to the page.
*/
define('CSS_SYSTEM', -100);
/**
* The default group for module CSS files added to the page.
*/
define('CSS_DEFAULT', 0);
/**
* The default group for theme CSS files added to the page.
*/
define('CSS_THEME', 100);
/**
* The default group for JavaScript libraries, settings or jQuery plugins added
* to the page.
*/
define('JS_LIBRARY', -100);
/**
* The default group for module JavaScript code added to the page.
*/
define('JS_DEFAULT', 0);
/**
* The default group for theme JavaScript code added to the page.
*/
define('JS_THEME', 100);
/**
* Error code indicating that the request made by drupal_http_request() exceeded
* the specified timeout.
*/
define('HTTP_REQUEST_TIMEOUT', 1);
/**
* Constants defining cache granularity for blocks and renderable arrays.
*
* Modules specify the caching patterns for their blocks using binary
* combinations of these constants in their hook_block_info():
* $block[delta]['cache'] = DRUPAL_CACHE_PER_ROLE | DRUPAL_CACHE_PER_PAGE;
* DRUPAL_CACHE_PER_ROLE is used as a default when no caching pattern is
* specified. Use DRUPAL_CACHE_CUSTOM to disable standard block cache and
* implement
*
* The block cache is cleared in cache_clear_all(), and uses the same clearing
* policy than page cache (node, comment, user, taxonomy added or updated...).
* Blocks requiring more fine-grained clearing might consider disabling the
* built-in block cache (DRUPAL_NO_CACHE) and roll their own.
*
* Note that user 1 is excluded from block caching.
*/
/**
* The block should not get cached. This setting should be used:
* - for simple blocks (notably those that do not perform any db query),
* where querying the db cache would be more expensive than directly generating
* the content.
* - for blocks that change too frequently.
*/
define('DRUPAL_NO_CACHE', -1);
/**
* The block is handling its own caching in its hook_block_view(). From the
* perspective of the block cache system, this is equivalent to DRUPAL_NO_CACHE.
* Useful when time based expiration is needed or a site uses a node access
* which invalidates standard block cache.
*/
define('DRUPAL_CACHE_CUSTOM', -2);
/**
* The block or element can change depending on the roles the user viewing the
* page belongs to. This is the default setting for blocks, used when the block
* does not specify anything.
*/
define('DRUPAL_CACHE_PER_ROLE', 0x0001);
/**
* The block or element can change depending on the user viewing the page.
* This setting can be resource-consuming for sites with large number of users,
* and thus should only be used when DRUPAL_CACHE_PER_ROLE is not sufficient.
*/define('DRUPAL_CACHE_PER_USER', 0x0002);
/**
* The block or element can change depending on the page being viewed.
*/
define('DRUPAL_CACHE_PER_PAGE', 0x0004);
/**
* The block or element is the same for every user on every page where it is visible.
*/
define('DRUPAL_CACHE_GLOBAL', 0x0008);
/**
* Add content to a specified region.
*
* @param $region
* Page region the content is added to.
* @param $data
* Content to be added.
*/
function drupal_add_region_content($region = NULL, $data = NULL) {
static $content = array();
if (isset($region) && isset($data)) {
$content[$region][] = $data;
}
return $content;
}
/**
* Get assigned content for a given region.
*
* @param $region
* A specified region to fetch content for. If NULL, all regions will be
* returned.
* @param $delimiter
* Content to be inserted between imploded array elements.
*/
function drupal_get_region_content($region = NULL, $delimiter = ' ') {
$content = drupal_add_region_content();
if (isset($region)) {
if (isset($content[$region]) && is_array($content[$region])) {
return implode($delimiter, $content[$region]);
}
}
else {
foreach (array_keys($content) as $region) {
if (is_array($content[$region])) {
$content[$region] = implode($delimiter, $content[$region]);
}
}
return $content;
}
}
/**
* Get the name of the currently active install profile.
*
* When this function is called during Drupal's initial installation process,
* the name of the profile that's about to be installed is stored in the global
* installation state. At all other times, the standard Drupal systems variable
* table contains the name of the current profile, and we can call variable_get()
* to determine what one is active.
*
* @return $profile
* The name of the install profile.
*/
function drupal_get_profile() {
global $install_state;
if (isset($install_state['parameters']['profile'])) {
$profile = $install_state['parameters']['profile'];
}
else {
$profile = variable_get('install_profile', 'standard');
}
return $profile;
}
/**
* Set the breadcrumb trail for the current page.
*
* @param $breadcrumb
* Array of links, starting with "home" and proceeding up to but not including
* the current page.
*/
function drupal_set_breadcrumb($breadcrumb = NULL) {
$stored_breadcrumb = &drupal_static(__FUNCTION__);
if (isset($breadcrumb)) {
$stored_breadcrumb = $breadcrumb;
}
return $stored_breadcrumb;
}
/**
* Get the breadcrumb trail for the current page.
*/
function drupal_get_breadcrumb() {
$breadcrumb = drupal_set_breadcrumb();
if (!isset($breadcrumb)) {
$breadcrumb = menu_get_active_breadcrumb();
}
return $breadcrumb;
}
/**
* Returns a string containing RDF namespace declarations for use in XML and
* XHTML output.
*/
function drupal_get_rdf_namespaces() {
$xml_rdf_namespaces = array();
// Serializes the RDF namespaces in XML namespace syntax.
if (function_exists('rdf_get_namespaces')) {
foreach (rdf_get_namespaces() as $prefix => $uri) {
$xml_rdf_namespaces[] = 'xmlns:' . $prefix . '="' . $uri . '"';
}
}
return count($xml_rdf_namespaces) ? "\n " . implode("\n ", $xml_rdf_namespaces) : '';
}
/**
* Add output to the head tag of the HTML page.
*
* This function can be called as long the headers aren't sent. Pass no
* arguments (or NULL for both) to retrieve the currently stored elements.
*
* @param $data
* A renderable array. If the '#type' key is not set then 'html_tag' will be
* added as the default '#type'.
* @param $key
* A unique string key to allow implementations of hook_html_head_alter() to
* identify the element in $data. Required if $data is not NULL.
*
* @return * An array of all stored HEAD elements.
*
* @see theme_html_tag()
*/
function drupal_add_html_head($data = NULL, $key = NULL) {
$stored_head = &drupal_static(__FUNCTION__);
if (!isset($stored_head)) {
// Make sure the defaults, including Content-Type, come first.
$stored_head = _drupal_default_html_head();
}
if (isset($data) && isset($key)) {
if (!isset($data['#type'])) {
$data['#type'] = 'html_tag';
}
$stored_head[$key] = $data;
}
return $stored_head;
}
/**
* Returns elements that are always displayed in the HEAD tag of the HTML page.
*/
function _drupal_default_html_head() {
// Add default elements. Make sure the Content-Type comes first because the
// IE browser may be vulnerable to XSS via encoding attacks from any content
// that comes before this META tag, such as a TITLE tag.
$elements['system_meta_content_type'] = array(
'#type' => 'html_tag',
'#tag' => 'meta',
'#attributes' => array(
'http-equiv' => 'Content-Type',
'content' => 'text/html; charset=utf-8',
),
// Security: This always has to be output first.
'#weight' => -1000,
);
// Show Drupal and the major version number in the META GENERATOR tag.
// Get the major version.
list($version, ) = explode('.', VERSION);
$elements['system_meta_generator'] = array(
'#type' => 'html_tag',
'#tag' => 'meta',
'#attributes' => array(
'name' => 'Generator',
'content' => 'Drupal ' . $version . ' (http://drupal.org)',
),
);
// Also send the generator in the HTTP header.
$elements['system_meta_generator']['#attached']['drupal_add_http_header'][] = array('X-Generator', $elements['system_meta_generator']['#attributes']['content']);
return $elements;
}
/**
* Retrieve output to be displayed in the HEAD tag of the HTML page.
*/
function drupal_get_html_head() {
$elements = drupal_add_html_head();
drupal_alter('html_head', $elements);
return drupal_render($elements);
}
/**
* Add a feed URL for the current page.
*
* This function can be called as long the HTML header hasn't been sent.
*
* @param $url
* An internal system path or a fully qualified external URL of the feed. * @param $title
* The title of the feed.
*/
function drupal_add_feed($url = NULL, $title = '') {
$stored_feed_links = &drupal_static(__FUNCTION__, array());
if (isset($url)) {
$stored_feed_links[$url] = theme('feed_icon', array('url' => $url, 'title' => $title));
drupal_add_html_head_link(array(
'rel' => 'alternate',
'type' => 'application/rss+xml',
'title' => $title,
// Force the URL to be absolute, for consistency with other <link> tags
// output by Drupal.
'href' => url($url, array('absolute' => TRUE)),
));
}
return $stored_feed_links;
}
/**
* Get the feed URLs for the current page.
*
* @param $delimiter
* A delimiter to split feeds by.
*/
function drupal_get_feeds($delimiter = "\n") {
$feeds = drupal_add_feed();
return implode($feeds, $delimiter);
}
/**
* @defgroup http_handling HTTP handling
* @{
* Functions to properly handle HTTP responses.
*/
/**
* Process a URL query parameter array to remove unwanted elements.
*
* @param $query
* (optional) An array to be processed. Defaults to $_GET.
* @param $exclude
* (optional) A list of $query array keys to remove. Use "parent[child]" to
* exclude nested items. Defaults to array('q').
* @param $parent
* Internal use only. Used to build the $query array key for nested items.
*
* @return
* An array containing query parameters, which can be used for url().
*/
function drupal_get_query_parameters(array $query = NULL, array $exclude = array('q'), $parent = '') {
// Set defaults, if none given.
if (!isset($query)) {
$query = $_GET;
}
// If $exclude is empty, there is nothing to filter.
if (empty($exclude)) {
return $query;
}
elseif (!$parent) {
$exclude = array_flip($exclude);
}
$params = array();
foreach ($query as $key => $value) {
$string_key = ($parent ? $parent . '[' . $key . ']' : $key);
if (isset($exclude[$string_key])) {
continue; }
if (is_array($value)) {
$params[$key] = drupal_get_query_parameters($value, $exclude, $string_key);
}
else {
$params[$key] = $value;
}
}
return $params;
}
/**
* Split an URL-encoded query string into an array.
*
* @param $query
* The query string to split.
*
* @return
* An array of url decoded couples $param_name => $value.
*/
function drupal_get_query_array($query) {
$result = array();
if (!empty($query)) {
foreach (explode('&', $query) as $param) {
$param = explode('=', $param);
$result[$param[0]] = isset($param[1]) ? rawurldecode($param[1]) : '';
}
}
return $result;
}
/**
* Parse an array into a valid, rawurlencoded query string.
*
* This differs from http_build_query() as we need to rawurlencode() (instead of
* urlencode()) all query parameters.
*
* @param $query
* The query parameter array to be processed, e.g. $_GET.
* @param $parent
* Internal use only. Used to build the $query array key for nested items.
*
* @return
* A rawurlencoded string which can be used as or appended to the URL query
* string.
*
* @see drupal_get_query_parameters()
* @ingroup php_wrappers
*/
function drupal_http_build_query(array $query, $parent = '') {
$params = array();
foreach ($query as $key => $value) {
$key = ($parent ? $parent . '[' . rawurlencode($key) . ']' : rawurlencode($key));
// Recurse into children.
if (is_array($value)) {
$params[] = drupal_http_build_query($value, $key);
}
// If a query parameter value is NULL, only append its key.
elseif (!isset($value)) {
$params[] = $key;
}
else {
// For better readability of paths in query strings, we decode slashes.
$params[] = $key . '=' . str_replace('%2F', '/', rawurlencode($value));
}
}
return implode('&', $params);
}
/**
* Prepare a 'destination' URL query parameter for use in combination with drupal_goto().
*
* Used to direct the user back to the referring page after completing a form.
* By default the current URL is returned. If a destination exists in the
* previous request, that destination is returned. As such, a destination can
* persist across multiple pages.
*
* @see drupal_goto()
*/
function drupal_get_destination() {
$destination = &drupal_static(__FUNCTION__);
if (isset($destination)) {
return $destination;
}
if (isset($_GET['destination'])) {
$destination = array('destination' => $_GET['destination']);
}
else {
$path = $_GET['q'];
$query = drupal_http_build_query(drupal_get_query_parameters());
if ($query != '') {
$path .= '?' . $query;
}
$destination = array('destination' => $path);
}
return $destination;
}
/**
* Wrapper around parse_url() to parse a system URL string into an associative array, suitable for url().
*
* This function should only be used for URLs that have been generated by the
* system, resp. url(). It should not be used for URLs that come from external
* sources, or URLs that link to external resources.
*
* The returned array contains a 'path' that may be passed separately to url().
* For example:
* @code
* $options = drupal_parse_url($_GET['destination']);
* $my_url = url($options['path'], $options);
* $my_link = l('Example link', $options['path'], $options);
* @endcode
*
* This is required, because url() does not support relative URLs containing a
* query string or fragment in its $path argument. Instead, any query string
* needs to be parsed into an associative query parameter array in
* $options['query'] and the fragment into $options['fragment'].
*
* @param $url
* The URL string to parse, f.e. $_GET['destination'].
*
* @return
* An associative array containing the keys:
* - 'path': The path of the URL. If the given $url is external, this includes
* the scheme and host.
* - 'query': An array of query parameters of $url, if existent.
* - 'fragment': The fragment of $url, if existent.
*
* @see url()
* @see drupal_goto()
* @ingroup php_wrappers
*/
function drupal_parse_url($url) { $options = array(
'path' => NULL,
'query' => array(),
'fragment' => '',
);
// External URLs: not using parse_url() here, so we do not have to rebuild
// the scheme, host, and path without having any use for it.
if (strpos($url, '://') !== FALSE) {
// Split off everything before the query string into 'path'.
$parts = explode('?', $url);
$options['path'] = $parts[0];
// If there is a query string, transform it into keyed query parameters.
if (isset($parts[1])) {
$query_parts = explode('#', $parts[1]);
parse_str($query_parts[0], $options['query']);
// Take over the fragment, if there is any.
if (isset($query_parts[1])) {
$options['fragment'] = $query_parts[1];
}
}
}
// Internal URLs.
else {
// parse_url() does not support relative URLs, so make it absolute. E.g. the
// relative URL "foo/bar:1" isn't properly parsed.
$parts = parse_url('http://example.com/' . $url);
// Strip the leading slash that was just added.
$options['path'] = substr($parts['path'], 1);
if (isset($parts['query'])) {
parse_str($parts['query'], $options['query']);
}
if (isset($parts['fragment'])) {
$options['fragment'] = $parts['fragment'];
}
}
// The 'q' parameter contains the path of the current page if clean URLs are
// disabled. It overrides the 'path' of the URL when present, even if clean
// URLs are enabled, due to how Apache rewriting rules work.
if (isset($options['query']['q'])) {
$options['path'] = $options['query']['q'];
unset($options['query']['q']);
}
return $options;
}
/**
* Encodes a Drupal path for use in a URL.
*
* For aesthetic reasons slashes are not escaped.
*
* Note that url() takes care of calling this function, so a path passed to that
* function should not be encoded in advance.
*
* @param $path
* The Drupal path to encode.
*/
function drupal_encode_path($path) {
return str_replace('%2F', '/', rawurlencode($path));
}
/**
* Send the user to a different Drupal page.
*
* This issues an on-site HTTP redirect. The function makes sure the redirected
* URL is formatted correctly.
*
* If a destination was specified in the current request's URI (i.e.,
* $_GET['destination']) then it will override the $path and $options values * passed to this function. This provides the flexibility to build a link to
* user/login and override the default redirection so that the user is
* redirected to a specific path after logging in:
* @code
* $query = array('destination' => "node/$node->nid");
* $link = l(t('Log in'), 'user/login', array('query' => $query));
* @endcode
*
* Drupal will ensure that messages set by drupal_set_message() and other
* session data are written to the database before the user is redirected.
*
* This function ends the request; use it instead of a return in your menu
* callback.
*
* @param $path
* A Drupal path or a full URL.
* @param $options
* An associative array of additional URL options to pass to url().
* @param $http_response_code
* Valid values for an actual "goto" as per RFC 2616 section 10.3 are:
* - 301 Moved Permanently (the recommended value for most redirects)
* - 302 Found (default in Drupal and PHP, sometimes used for spamming search
* engines)
* - 303 See Other
* - 304 Not Modified
* - 305 Use Proxy
* - 307 Temporary Redirect (alternative to "503 Site Down for Maintenance")
* Note: Other values are defined by RFC 2616, but are rarely used and poorly
* supported.
*
* @see drupal_get_destination()
* @see url()
*/
function drupal_goto($path = '', array $options = array(), $http_response_code = 302) {
// A destination in $_GET always overrides the function arguments.
// We do not allow absolute URLs to be passed via $_GET, as this can be an attack vector.
if (isset($_GET['destination']) && !url_is_external($_GET['destination'])) {
$destination = drupal_parse_url($_GET['destination']);
$path = $destination['path'];
$options['query'] = $destination['query'];
$options['fragment'] = $destination['fragment'];
}
drupal_alter('drupal_goto', $path, $options, $http_response_code);
// The 'Location' HTTP header must be absolute.
$options['absolute'] = TRUE;
$url = url($path, $options);
header('Location: ' . $url, TRUE, $http_response_code);
// The "Location" header sends a redirect status code to the HTTP daemon. In
// some cases this can be wrong, so we make sure none of the code below the
// drupal_goto() call gets executed upon redirection.
drupal_exit($url);
}
/**
* Deliver a "site is under maintenance" message to the browser.
*
* Page callback functions wanting to report a "site offline" message should
* return MENU_SITE_OFFLINE instead of calling drupal_site_offline(). However,
* functions that are invoked in contexts where that return value might not
* bubble up to menu_execute_active_handler() should call drupal_site_offline().
*/
function drupal_site_offline() {
drupal_deliver_page(MENU_SITE_OFFLINE);
}
/**
* Deliver a "page not found" error to the browser.
*
* Page callback functions wanting to report a "page not found" message should
* return MENU_NOT_FOUND instead of calling drupal_not_found(). However,
* functions that are invoked in contexts where that return value might not
* bubble up to menu_execute_active_handler() should call drupal_not_found().
*/
function drupal_not_found() {
drupal_deliver_page(MENU_NOT_FOUND);
}
/**
* Deliver a "access denied" error to the browser.
*
* Page callback functions wanting to report an "access denied" message should
* return MENU_ACCESS_DENIED instead of calling drupal_access_denied(). However,
* functions that are invoked in contexts where that return value might not
* bubble up to menu_execute_active_handler() should call drupal_access_denied().
*/
function drupal_access_denied() {
drupal_deliver_page(MENU_ACCESS_DENIED);
}
/**
* Perform an HTTP request.
*
* This is a flexible and powerful HTTP client implementation. Correctly
* handles GET, POST, PUT or any other HTTP requests. Handles redirects.
*
* @param $url
* A string containing a fully qualified URI.
* @param array $options
* (optional) An array that can have one or more of the following elements:
* - headers: An array containing request headers to send as name/value pairs.
* - method: A string containing the request method. Defaults to 'GET'.
* - data: A string containing the request body, formatted as
* 'param=value¶m=value&...'. Defaults to NULL.
* - max_redirects: An integer representing how many times a redirect
* may be followed. Defaults to 3.
* - timeout: A float representing the maximum number of seconds the function
* call may take. The default is 30 seconds. If a timeout occurs, the error
* code is set to the HTTP_REQUEST_TIMEOUT constant.
* - context: A context resource created with stream_context_create().
*
* @return object
* An object that can have one or more of the following components:
* - request: A string containing the request body that was sent.
* - code: An integer containing the response status code, or the error code
* if an error occurred.
* - protocol: The response protocol (e.g. HTTP/1.1 or HTTP/1.0).
* - status_message: The status message from the response, if a response was
* received.
* - redirect_code: If redirected, an integer containing the initial response
* status code.
* - redirect_url: If redirected, a string containing the URL of the redirect
* target.
* - error: If an error occurred, the error message. Otherwise not set.
* - headers: An array containing the response headers as name/value pairs.
* HTTP header names are case-insensitive (RFC 2616, section 4.2), so for
* easy access the array keys are returned in lower case.
* - data: A string containing the response body that was received.
*/
function drupal_http_request($url, array $options = array()) {
$result = new stdClass();
// Parse the URL and make sure we can handle the schema.
$uri = @parse_url($url);
if ($uri == FALSE) { $result->error = 'unable to parse URL';
$result->code = -1001;
return $result;
}
if (!isset($uri['scheme'])) {
$result->error = 'missing schema';
$result->code = -1002;
return $result;
}
timer_start(__FUNCTION__);
// Merge the default options.
$options += array(
'headers' => array(),
'method' => 'GET',
'data' => NULL,
'max_redirects' => 3,
'timeout' => 30.0,
'context' => NULL,
);
// stream_socket_client() requires timeout to be a float.
$options['timeout'] = (float) $options['timeout'];
switch ($uri['scheme']) {
case 'http':
case 'feed':
$port = isset($uri['port']) ? $uri['port'] : 80;
$socket = 'tcp://' . $uri['host'] . ':' . $port;
// RFC 2616: "non-standard ports MUST, default ports MAY be included".
// We don't add the standard port to prevent from breaking rewrite rules
// checking the host that do not take into account the port number.
$options['headers']['Host'] = $uri['host'] . ($port != 80 ? ':' . $port : '');
break;
case 'https':
// Note: Only works when PHP is compiled with OpenSSL support.
$port = isset($uri['port']) ? $uri['port'] : 443;
$socket = 'ssl://' . $uri['host'] . ':' . $port;
$options['headers']['Host'] = $uri['host'] . ($port != 443 ? ':' . $port : '');
break;
default:
$result->error = 'invalid schema ' . $uri['scheme'];
$result->code = -1003;
return $result;
}
if (empty($options['context'])) {
$fp = @stream_socket_client($socket, $errno, $errstr, $options['timeout']);
}
else {
// Create a stream with context. Allows verification of a SSL certificate.
$fp = @stream_socket_client($socket, $errno, $errstr, $options['timeout'], STREAM_CLIENT_CONNECT, $options['context']);
}
// Make sure the socket opened properly.
if (!$fp) {
// When a network error occurs, we use a negative number so it does not
// clash with the HTTP status codes.
$result->code = -$errno;
$result->error = trim($errstr) ? trim($errstr) : t('Error opening socket @socket', array('@socket' => $socket));
// Mark that this request failed. This will trigger a check of the web
// server's ability to make outgoing HTTP requests the next time that
// requirements checking is performed.
// See system_requirements()
variable_set('drupal_http_request_fails', TRUE);
return $result;
}
// Construct the path to act on.
$path = isset($uri['path']) ? $uri['path'] : '/';
if (isset($uri['query'])) {
$path .= '?' . $uri['query'];
}
// Merge the default headers.
$options['headers'] += array(
'User-Agent' => 'Drupal (+http://drupal.org/)',
);
// Only add Content-Length if we actually have any content or if it is a POST
// or PUT request. Some non-standard servers get confused by Content-Length in
// at least HEAD/GET requests, and Squid always requires Content-Length in
// POST/PUT requests.
$content_length = strlen($options['data']);
if ($content_length > 0 || $options['method'] == 'POST' || $options['method'] == 'PUT') {
$options['headers']['Content-Length'] = $content_length;
}
// If the server URL has a user then attempt to use basic authentication.
if (isset($uri['user'])) {
$options['headers']['Authorization'] = 'Basic ' . base64_encode($uri['user'] . (!empty($uri['pass']) ? ":" . $uri['pass'] : ''));
}
// If the database prefix is being used by SimpleTest to run the tests in a copied
// database then set the user-agent header to the database prefix so that any
// calls to other Drupal pages will run the SimpleTest prefixed database. The
// user-agent is used to ensure that multiple testing sessions running at the
// same time won't interfere with each other as they would if the database
// prefix were stored statically in a file or database variable.
$test_info = &$GLOBALS['drupal_test_info'];
if (!empty($test_info['test_run_id'])) {
$options['headers']['User-Agent'] = drupal_generate_test_ua($test_info['test_run_id']);
}
$request = $options['method'] . ' ' . $path . " HTTP/1.0\r\n";
foreach ($options['headers'] as $name => $value) {
$request .= $name . ': ' . trim($value) . "\r\n";
}
$request .= "\r\n" . $options['data'];
$result->request = $request;
// Calculate how much time is left of the original timeout value.
$timeout = $options['timeout'] - timer_read(__FUNCTION__) / 1000;
if ($timeout > 0) {
stream_set_timeout($fp, floor($timeout), floor(1000000 * fmod($timeout, 1)));
fwrite($fp, $request);
}
// Fetch response. Due to PHP bugs like http://bugs.php.net/bug.php?id=43782
// and http://bugs.php.net/bug.php?id=46049 we can't rely on feof(), but
// instead must invoke stream_get_meta_data() each iteration.
$info = stream_get_meta_data($fp);
$alive = !$info['eof'] && !$info['timed_out'];
$response = '';
while ($alive) {
// Calculate how much time is left of the original timeout value.
$timeout = $options['timeout'] - timer_read(__FUNCTION__) / 1000;
if ($timeout <= 0) {
$info['timed_out'] = TRUE;
break;
}
stream_set_timeout($fp, floor($timeout), floor(1000000 * fmod($timeout, 1)));
$chunk = fread($fp, 1024);
$response .= $chunk;
$info = stream_get_meta_data($fp);
$alive = !$info['eof'] && !$info['timed_out'] && $chunk;
} fclose($fp);
if ($info['timed_out']) {
$result->code = HTTP_REQUEST_TIMEOUT;
$result->error = 'request timed out';
return $result;
}
// Parse response headers from the response body.
// Be tolerant of malformed HTTP responses that separate header and body with
// \n\n or \r\r instead of \r\n\r\n.
list($response, $result->data) = preg_split("/\r\n\r\n|\n\n|\r\r/", $response, 2);
$response = preg_split("/\r\n|\n|\r/", $response);
// Parse the response status line.
list($protocol, $code, $status_message) = explode(' ', trim(array_shift($response)), 3);
$result->protocol = $protocol;
$result->status_message = $status_message;
$result->headers = array();
// Parse the response headers.
while ($line = trim(array_shift($response))) {
list($name, $value) = explode(':', $line, 2);
$name = strtolower($name);
if (isset($result->headers[$name]) && $name == 'set-cookie') {
// RFC 2109: the Set-Cookie response header comprises the token Set-
// Cookie:, followed by a comma-separated list of one or more cookies.
$result->headers[$name] .= ',' . trim($value);
}
else {
$result->headers[$name] = trim($value);
}
}
$responses = array(
100 => 'Continue',
101 => 'Switching Protocols',
200 => 'OK',
201 => 'Created',
202 => 'Accepted',
203 => 'Non-Authoritative Information',
204 => 'No Content',
205 => 'Reset Content',
206 => 'Partial Content',
300 => 'Multiple Choices',
301 => 'Moved Permanently',
302 => 'Found',
303 => 'See Other',
304 => 'Not Modified',
305 => 'Use Proxy',
307 => 'Temporary Redirect',
400 => 'Bad Request',
401 => 'Unauthorized',
402 => 'Payment Required',
403 => 'Forbidden',
404 => 'Not Found',
405 => 'Method Not Allowed',
406 => 'Not Acceptable',
407 => 'Proxy Authentication Required',
408 => 'Request Time-out',
409 => 'Conflict',
410 => 'Gone',
411 => 'Length Required',
412 => 'Precondition Failed',
413 => 'Request Entity Too Large',
414 => 'Request-URI Too Large',
415 => 'Unsupported Media Type',
416 => 'Requested range not satisfiable',
417 => 'Expectation Failed',
500 => 'Internal Server Error', 501 => 'Not Implemented',
502 => 'Bad Gateway',
503 => 'Service Unavailable',
504 => 'Gateway Time-out',
505 => 'HTTP Version not supported',
);
// RFC 2616 states that all unknown HTTP codes must be treated the same as the
// base code in their class.
if (!isset($responses[$code])) {
$code = floor($code / 100) * 100;
}
$result->code = $code;
switch ($code) {
case 200: // OK
case 304: // Not modified
break;
case 301: // Moved permanently
case 302: // Moved temporarily
case 307: // Moved temporarily
$location = $result->headers['location'];
$options['timeout'] -= timer_read(__FUNCTION__) / 1000;
if ($options['timeout'] <= 0) {
$result->code = HTTP_REQUEST_TIMEOUT;
$result->error = 'request timed out';
}
elseif ($options['max_redirects']) {
// Redirect to the new location.
$options['max_redirects']--;
$result = drupal_http_request($location, $options);
$result->redirect_code = $code;
}
if (!isset($result->redirect_url)) {
$result->redirect_url = $location;
}
break;
default:
$result->error = $status_message;
}
return $result;
}
/**
* @} End of "HTTP handling".
*/
function _fix_gpc_magic(&$item) {
if (is_array($item)) {
array_walk($item, '_fix_gpc_magic');
}
else {
$item = stripslashes($item);
}
}
/**
* Helper function to strip slashes from $_FILES skipping over the tmp_name keys
* since PHP generates single backslashes for file paths on Windows systems.
*
* tmp_name does not have backslashes added see
* http://php.net/manual/en/features.file-upload.php#42280
*/
function _fix_gpc_magic_files(&$item, $key) {
if ($key != 'tmp_name') {
if (is_array($item)) {
array_walk($item, '_fix_gpc_magic_files');
}
else {
$item = stripslashes($item);
} }
}
/**
* Fix double-escaping problems caused by "magic quotes" in some PHP installations.
*/
function fix_gpc_magic() {
static $fixed = FALSE;
if (!$fixed && ini_get('magic_quotes_gpc')) {
array_walk($_GET, '_fix_gpc_magic');
array_walk($_POST, '_fix_gpc_magic');
array_walk($_COOKIE, '_fix_gpc_magic');
array_walk($_REQUEST, '_fix_gpc_magic');
array_walk($_FILES, '_fix_gpc_magic_files');
}
$fixed = TRUE;
}
/**
* @defgroup validation Input validation
* @{
* Functions to validate user input.
*/
/**
* Verify the syntax of the given e-mail address.
*
* Empty e-mail addresses are allowed. See RFC 2822 for details.
*
* @param $mail
* A string containing an e-mail address.
* @return
* TRUE if the address is in a valid format.
*/
function valid_email_address($mail) {
return (bool)filter_var($mail, FILTER_VALIDATE_EMAIL);
}
/**
* Verify the syntax of the given URL.
*
* This function should only be used on actual URLs. It should not be used for
* Drupal menu paths, which can contain arbitrary characters.
* Valid values per RFC 3986.
* @param $url
* The URL to verify.
* @param $absolute
* Whether the URL is absolute (beginning with a scheme such as "http:").
* @return
* TRUE if the URL is in a valid format.
*/
function valid_url($url, $absolute = FALSE) {
if ($absolute) {
return (bool)preg_match("
/^ # Start at the beginning of the text
(?:ftp|https?|feed):\/\/ # Look for ftp, http, https or feed schemes
(?: # Userinfo (optional) which is typically
(?:(?:[\w\.\-\+!$&'\(\)*\+,;=]|%[0-9a-f]{2})+:)* # a username or a username and password
(?:[\w\.\-\+%!$&'\(\)*\+,;=]|%[0-9a-f]{2})+@ # combination
)?
(?:
(?:[a-z0-9\-\.]|%[0-9a-f]{2})+ # A domain name or a IPv4 address
|(?:\[(?:[0-9a-f]{0,4}:)*(?:[0-9a-f]{0,4})\]) # or a well formed IPv6 address
)
(?::[0-9]+)? # Server port number (optional)
(?:[\/|\?]
(?:[\w#!:\.\?\+=&@$'~*,;\/\(\)\[\]\-]|%[0-9a-f]{2}) # The path and query (optional)
*)?
$/xi", $url);
} else {
return (bool)preg_match("/^(?:[\w#!:\.\?\+=&@$'~*,;\/\(\)\[\]\-]|%[0-9a-f]{2})+$/i", $url);
}
}
/**
* @} End of "defgroup validation".
*/
/**
* Register an event for the current visitor to the flood control mechanism.
*
* @param $name
* The name of an event.
* @param $window
* Optional number of seconds before this event expires. Defaults to 3600 (1
* hour). Typically uses the same value as the flood_is_allowed() $window
* parameter. Expired events are purged on cron run to prevent the flood table
* from growing indefinitely.
* @param $identifier
* Optional identifier (defaults to the current user's IP address).
*/
function flood_register_event($name, $window = 3600, $identifier = NULL) {
if (!isset($identifier)) {
$identifier = ip_address();
}
db_insert('flood')
->fields(array(
'event' => $name,
'identifier' => $identifier,
'timestamp' => REQUEST_TIME,
'expiration' => REQUEST_TIME + $window,
))
->execute();
}
/**
* Make the flood control mechanism forget about an event for the current visitor.
*
* @param $name
* The name of an event.
* @param $identifier
* Optional identifier (defaults to the current user's IP address).
*/
function flood_clear_event($name, $identifier = NULL) {
if (!isset($identifier)) {
$identifier = ip_address();
}
db_delete('flood')
->condition('event', $name)
->condition('identifier', $identifier)
->execute();
}
/**
* Checks whether user is allowed to proceed with the specified event.
*
* Events can have thresholds saying that each user can only do that event
* a certain number of times in a time window. This function verifies that the
* current user has not exceeded this threshold.
*
* @param $name
* The unique name of the event.
* @param $threshold
* The maximum number of times each user can do this event per time window.
* @param $window
* Number of seconds in the time window for this event (default is 3600
* seconds, or 1 hour).
* @param $identifier
* Unique identifier of the current user. Defaults to their IP address. *
* @return
* TRUE if the user is allowed to proceed. FALSE if they have exceeded the
* threshold and should not be allowed to proceed.
*/
function flood_is_allowed($name, $threshold, $window = 3600, $identifier = NULL) {
if (!isset($identifier)) {
$identifier = ip_address();
}
$number = db_query("SELECT COUNT(*) FROM {flood} WHERE event = :event AND identifier = :identifier AND timestamp > :timestamp", array(
':event' => $name,
':identifier' => $identifier,
':timestamp' => REQUEST_TIME - $window))
->fetchField();
return ($number < $threshold);
}
/**
* @defgroup sanitization Sanitization functions
* @{
* Functions to sanitize values.
*
* See http://drupal.org/writing-secure-code for information
* on writing secure code.
*/
/**
* Strips dangerous protocols (e.g. 'javascript:') from a URI.
*
* This function must be called for all URIs within user-entered input prior
* to being output to an HTML attribute value. It is often called as part of
* check_url() or filter_xss(), but those functions return an HTML-encoded
* string, so this function can be called independently when the output needs to
* be a plain-text string for passing to t(), l(), drupal_attributes(), or
* another function that will call check_plain() separately.
*
* @param $uri
* A plain-text URI that might contain dangerous protocols.
*
* @return
* A plain-text URI stripped of dangerous protocols. As with all plain-text
* strings, this return value must not be output to an HTML page without
* check_plain() being called on it. However, it can be passed to functions
* expecting plain-text strings.
*
* @see check_url()
*/
function drupal_strip_dangerous_protocols($uri) {
static $allowed_protocols;
if (!isset($allowed_protocols)) {
$allowed_protocols = array_flip(variable_get('filter_allowed_protocols', array('ftp', 'http', 'https', 'irc', 'mailto', 'news', 'nntp', 'rtsp', 'sftp', 'ssh', 'tel', 'telnet', 'webcal')));
}
// Iteratively remove any invalid protocol found.
do {
$before = $uri;
$colonpos = strpos($uri, ':');
if ($colonpos > 0) {
// We found a colon, possibly a protocol. Verify.
$protocol = substr($uri, 0, $colonpos);
// If a colon is preceded by a slash, question mark or hash, it cannot
// possibly be part of the URL scheme. This must be a relative URL, which
// inherits the (safe) protocol of the base document.
if (preg_match('![/?#]!', $protocol)) {
break;
}
// Check if this is a disallowed protocol. Per RFC2616, section 3.2.3
// (URI Comparison) scheme comparison must be case-insensitive.
if (!isset($allowed_protocols[strtolower($protocol)])) { $uri = substr($uri, $colonpos + 1);
}
}
} while ($before != $uri);
return $uri;
}
/**
* Strips dangerous protocols (e.g. 'javascript:') from a URI and encodes it for output to an HTML attribute value.
*
* @param $uri
* A plain-text URI that might contain dangerous protocols.
*
* @return
* A URI stripped of dangerous protocols and encoded for output to an HTML
* attribute value. Because it is already encoded, it should not be set as a
* value within a $attributes array passed to drupal_attributes(), because
* drupal_attributes() expects those values to be plain-text strings. To pass
* a filtered URI to drupal_attributes(), call
* drupal_strip_dangerous_protocols() instead.
*
* @see drupal_strip_dangerous_protocols()
*/
function check_url($uri) {
return check_plain(drupal_strip_dangerous_protocols($uri));
}
/**
* Very permissive XSS/HTML filter for admin-only use.
*
* Use only for fields where it is impractical to use the
* whole filter system, but where some (mainly inline) mark-up
* is desired (so check_plain() is not acceptable).
*
* Allows all tags that can be used inside an HTML body, save
* for scripts and styles.
*/
function filter_xss_admin($string) {
return filter_xss($string, array('a', 'abbr', 'acronym', 'address', 'b', 'bdo', 'big', 'blockquote', 'br', 'caption', 'cite', 'code', 'col', 'colgroup', 'dd', 'del', 'dfn', 'div', 'dl', 'dt', 'em', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'img', 'ins', 'kbd', 'li', 'ol', 'p', 'pre', 'q', 'samp', 'small', 'span', 'strong', 'sub', 'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr', 'tt', 'ul', 'var'));
}
/**
* Filters an HTML string to prevent cross-site-scripting (XSS) vulnerabilities.
*
* Based on kses by Ulf Harnhammar, see http://sourceforge.net/projects/kses.
* For examples of various XSS attacks, see: http://ha.ckers.org/xss.html.
*
* This code does four things:
* - Removes characters and constructs that can trick browsers.
* - Makes sure all HTML entities are well-formed.
* - Makes sure all HTML tags and attributes are well-formed.
* - Makes sure no HTML tags contain URLs with a disallowed protocol (e.g.
* javascript:).
*
* @param $string
* The string with raw HTML in it. It will be stripped of everything that can
* cause an XSS attack.
* @param $allowed_tags
* An array of allowed tags.
*
* @return
* An XSS safe version of $string, or an empty string if $string is not
* valid UTF-8.
*
* @see drupal_validate_utf8()
* @ingroup sanitization
*/
function filter_xss($string, $allowed_tags = array('a', 'em', 'strong', 'cite', 'blockquote', 'code', 'ul', 'ol', 'li', 'dl', 'dt', 'dd')) {
// Only operate on valid UTF-8 strings. This is necessary to prevent cross // site scripting issues on Internet Explorer 6.
if (!drupal_validate_utf8($string)) {
return '';
}
// Store the text format
_filter_xss_split($allowed_tags, TRUE);
// Remove NULL characters (ignored by some browsers)
$string = str_replace(chr(0), '', $string);
// Remove Netscape 4 JS entities
$string = preg_replace('%&\s*\{[^}]*(\}\s*;?|$)%', '', $string);
// Defuse all HTML entities
$string = str_replace('&', '&', $string);
// Change back only well-formed entities in our whitelist
// Decimal numeric entities
$string = preg_replace('/&#([0-9]+;)/', '&#\1', $string);
// Hexadecimal numeric entities
$string = preg_replace('/&#[Xx]0*((?:[0-9A-Fa-f]{2})+;)/', '&#x\1', $string);
// Named entities
$string = preg_replace('/&([A-Za-z][A-Za-z0-9]*;)/', '&\1', $string);
return preg_replace_callback('%
(
<(?=[^a-zA-Z!/]) # a lone <
| # or
<!--.*?--> # a comment
| # or
<[^>]*(>|$) # a string that starts with a <, up until the > or the end of the string
| # or
> # just a >
)%x', '_filter_xss_split', $string);
}
/**
* Processes an HTML tag.
*
* @param $m
* An array with various meaning depending on the value of $store.
* If $store is TRUE then the array contains the allowed tags.
* If $store is FALSE then the array has one element, the HTML tag to process.
* @param $store
* Whether to store $m.
* @return
* If the element isn't allowed, an empty string. Otherwise, the cleaned up
* version of the HTML element.
*/
function _filter_xss_split($m, $store = FALSE) {
static $allowed_html;
if ($store) {
$allowed_html = array_flip($m);
return;
}
$string = $m[1];
if (substr($string, 0, 1) != '<') {
// We matched a lone ">" character
return '>';
}
elseif (strlen($string) == 1) {
// We matched a lone "<" character
return '<';
}
if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?|(<!--.*?-->)$%', $string, $matches)) {
// Seriously malformed
return '';
}
$slash = trim($matches[1]);
$elem = &$matches[2];
$attrlist = &$matches[3];
$comment = &$matches[4];
if ($comment) {
$elem = '!--';
}
if (!isset($allowed_html[strtolower($elem)])) {
// Disallowed HTML element
return '';
}
if ($comment) {
return $comment;
}
if ($slash != '') {
return "</$elem>";
}
// Is there a closing XHTML slash at the end of the attributes?
$attrlist = preg_replace('%(\s?)/\s*$%', '\1', $attrlist, -1, $count);
$xhtml_slash = $count ? ' /' : '';
// Clean up attributes
$attr2 = implode(' ', _filter_xss_attributes($attrlist));
$attr2 = preg_replace('/[<>]/', '', $attr2);
$attr2 = strlen($attr2) ? ' ' . $attr2 : '';
return "<$elem$attr2$xhtml_slash>";
}
/**
* Processes a string of HTML attributes.
*
* @return
* Cleaned up version of the HTML attributes.
*/
function _filter_xss_attributes($attr) {
$attrarr = array();
$mode = 0;
$attrname = '';
while (strlen($attr) != 0) {
// Was the last operation successful?
$working = 0;
switch ($mode) {
case 0:
// Attribute name, href for instance
if (preg_match('/^([-a-zA-Z]+)/', $attr, $match)) {
$attrname = strtolower($match[1]);
$skip = ($attrname == 'style' || substr($attrname, 0, 2) == 'on');
$working = $mode = 1;
$attr = preg_replace('/^[-a-zA-Z]+/', '', $attr);
}
break;
case 1:
// Equals sign or valueless ("selected")
if (preg_match('/^\s*=\s*/', $attr)) {
$working = 1; $mode = 2;
$attr = preg_replace('/^\s*=\s*/', '', $attr);
break;
}
if (preg_match('/^\s+/', $attr)) {
$working = 1; $mode = 0; if (!$skip) {
$attrarr[] = $attrname;
}
$attr = preg_replace('/^\s+/', '', $attr);
}
break;
case 2:
// Attribute value, a URL after href= for instance
if (preg_match('/^"([^"]*)"(\s+|$)/', $attr, $match)) {
$thisval = filter_xss_bad_protocol($match[1]);
if (!$skip) {
$attrarr[] = "$attrname=\"$thisval\"";
}
$working = 1;
$mode = 0;
$attr = preg_replace('/^"[^"]*"(\s+|$)/', '', $attr);
break;
}
if (preg_match("/^'([^']*)'(\s+|$)/", $attr, $match)) {
$thisval = filter_xss_bad_protocol($match[1]);
if (!$skip) {
$attrarr[] = "$attrname='$thisval'";
}
$working = 1; $mode = 0;
$attr = preg_replace("/^'[^']*'(\s+|$)/", '', $attr);
break;
}
if (preg_match("%^([^\s\"']+)(\s+|$)%", $attr, $match)) {
$thisval = filter_xss_bad_protocol($match[1]);
if (!$skip) {
$attrarr[] = "$attrname=\"$thisval\"";
}
$working = 1; $mode = 0;
$attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr);
}
break;
}
if ($working == 0) {
// not well formed, remove and try again
$attr = preg_replace('/
^
(
"[^"]*("|$) # - a string that starts with a double quote, up until the next double quote or the end of the string
| # or
\'[^\']*(\'|$)| # - a string that starts with a quote, up until the next quote or the end of the string
| # or
\S # - a non-whitespace character
)* # any number of the above three
\s* # any number of whitespaces
/x', '', $attr);
$mode = 0;
}
}
// The attribute list ends with a valueless attribute like "selected".
if ($mode == 1 && !$skip) {
$attrarr[] = $attrname;
}
return $attrarr;
}
/**
* Processes an HTML attribute value and ensures it does not contain an URL with a disallowed protocol (e.g. javascript:). *
* @param $string
* The string with the attribute value.
* @param $decode
* (Deprecated) Whether to decode entities in the $string. Set to FALSE if the
* $string is in plain text, TRUE otherwise. Defaults to TRUE. This parameter
* is deprecated and will be removed in Drupal 8. To process a plain-text URI,
* call drupal_strip_dangerous_protocols() or check_url() instead.
* @return
* Cleaned up and HTML-escaped version of $string.
*/
function filter_xss_bad_protocol($string, $decode = TRUE) {
// Get the plain text representation of the attribute value (i.e. its meaning).
// @todo Remove the $decode parameter in Drupal 8, and always assume an HTML
// string that needs decoding.
if ($decode) {
if (!function_exists('decode_entities')) {
require_once DRUPAL_ROOT . '/includes/unicode.inc';
}
$string = decode_entities($string);
}
return check_plain(drupal_strip_dangerous_protocols($string));
}
/**
* @} End of "defgroup sanitization".
*/
/**
* @defgroup format Formatting
* @{
* Functions to format numbers, strings, dates, etc.
*/
/**
* Formats an RSS channel.
*
* Arbitrary elements may be added using the $args associative array.
*/
function format_rss_channel($title, $link, $description, $items, $langcode = NULL, $args = array()) {
global $language_content;
$langcode = $langcode ? $langcode : $language_content->language;
$output = "<channel>\n";
$output .= ' <title>' . check_plain($title) . "</title>\n";
$output .= ' <link>' . check_url($link) . "</link>\n";
// The RSS 2.0 "spec" doesn't indicate HTML can be used in the description.
// We strip all HTML tags, but need to prevent double encoding from properly
// escaped source data (such as & becoming &amp;).
$output .= ' <description>' . check_plain(decode_entities(strip_tags($description))) . "</description>\n";
$output .= ' <language>' . check_plain($langcode) . "</language>\n";
$output .= format_xml_elements($args);
$output .= $items;
$output .= "</channel>\n";
return $output;
}
/**
* Format a single RSS item.
*
* Arbitrary elements may be added using the $args associative array.
*/
function format_rss_item($title, $link, $description, $args = array()) {
$output = "<item>\n";
$output .= ' <title>' . check_plain($title) . "</title>\n";
$output .= ' <link>' . check_url($link) . "</link>\n";
$output .= ' <description>' . check_plain($description) . "</description>\n"; $output .= format_xml_elements($args);
$output .= "</item>\n";
return $output;
}
/**
* Format XML elements.
*
* @param $array
* An array where each item represents an element and is either a:
* - (key => value) pair (<key>value</key>)
* - Associative array with fields:
* - 'key': element name
* - 'value': element contents
* - 'attributes': associative array of element attributes
*
* In both cases, 'value' can be a simple string, or it can be another array
* with the same format as $array itself for nesting.
*/
function format_xml_elements($array) {
$output = '';
foreach ($array as $key => $value) {
if (is_numeric($key)) {
if ($value['key']) {
$output .= ' <' . $value['key'];
if (isset($value['attributes']) && is_array($value['attributes'])) {
$output .= drupal_attributes($value['attributes']);
}
if (isset($value['value']) && $value['value'] != '') {
$output .= '>' . (is_array($value['value']) ? format_xml_elements($value['value']) : check_plain($value['value'])) . '</' . $value['key'] . ">\n";
}
else {
$output .= " />\n";
}
}
}
else {
$output .= ' <' . $key . '>' . (is_array($value) ? format_xml_elements($value) : check_plain($value)) . "</$key>\n";
}
}
return $output;
}
/**
* Format a string containing a count of items.
*
* This function ensures that the string is pluralized correctly. Since t() is
* called by this function, make sure not to pass already-localized strings to
* it.
*
* For example:
* @code
* $output = format_plural($node->comment_count, '1 comment', '@count comments');
* @endcode
*
* Example with additional replacements:
* @code
* $output = format_plural($update_count,
* 'Changed the content type of 1 post from %old-type to %new-type.',
* 'Changed the content type of @count posts from %old-type to %new-type.',
* array('%old-type' => $info->old_type, '%new-type' => $info->new_type)));
* @endcode
*
* @param $count
* The item count to display.
* @param $singular
* The string for the singular case. Please make sure it is clear this is
* singular, to ease translation (e.g. use "1 new comment" instead of "1 new"). * Do not use @count in the singular string.
* @param $plural
* The string for the plural case. Please make sure it is clear this is plural,
* to ease translation. Use @count in place of the item count, as in "@count
* new comments".
* @param $args
* An associative array of replacements to make after translation. Incidences
* of any key in this array are replaced with the corresponding value.
* Based on the first character of the key, the value is escaped and/or themed:
* - !variable: inserted as is
* - @variable: escape plain text to HTML (check_plain)
* - %variable: escape text and theme as a placeholder for user-submitted
* content (check_plain + drupal_placeholder)
* Note that you do not need to include @count in this array.
* This replacement is done automatically for the plural case.
* @param $options
* An associative array of additional options, with the following keys:
* - 'langcode' (default to the current language) The language code to
* translate to a language other than what is used to display the page.
* - 'context' (default to the empty context) The context the source string
* belongs to.
* @return
* A translated string.
*/
function format_plural($count, $singular, $plural, array $args = array(), array $options = array()) {
$args['@count'] = $count;
if ($count == 1) {
return t($singular, $args, $options);
}
// Get the plural index through the gettext formula.
$index = (function_exists('locale_get_plural')) ? locale_get_plural($count, isset($options['langcode']) ? $options['langcode'] : NULL) : -1;
// Backwards compatibility.
if ($index < 0) {
return t($plural, $args, $options);
}
else {
switch ($index) {
case "0":
return t($singular, $args, $options);
case "1":
return t($plural, $args, $options);
default:
unset($args['@count']);
$args['@count[' . $index . ']'] = $count;
return t(strtr($plural, array('@count' => '@count[' . $index . ']')), $args, $options);
}
}
}
/**
* Parse a given byte count.
*
* @param $size
* A size expressed as a number of bytes with optional SI or IEC binary unit
* prefix (e.g. 2, 3K, 5MB, 10G, 6GiB, 8 bytes, 9mbytes).
* @return
* An integer representation of the size in bytes.
*/
function parse_size($size) {
$unit = preg_replace('/[^bkmgtpezy]/i', '', $size); // Remove the non-unit characters from the size.
$size = preg_replace('/[^0-9\.]/', '', $size); // Remove the non-numeric characters from the size.
if ($unit) {
// Find the position of the unit in the ordered string which is the power of magnitude to multiply a kilobyte by.
return round($size * pow(DRUPAL_KILOBYTE, stripos('bkmgtpezy', $unit[0])));
}
else {
return round($size);
}
}
/**
* Generate a string representation for the given byte count.
*
* @param $size
* A size in bytes.
* @param $langcode
* Optional language code to translate to a language other than what is used
* to display the page.
* @return
* A translated string representation of the size.
*/
function format_size($size, $langcode = NULL) {
if ($size < DRUPAL_KILOBYTE) {
return format_plural($size, '1 byte', '@count bytes', array(), array('langcode' => $langcode));
}
else {
$size = $size / DRUPAL_KILOBYTE; // Convert bytes to kilobytes.
$units = array(
t('@size KB', array(), array('langcode' => $langcode)),
t('@size MB', array(), array('langcode' => $langcode)),
t('@size GB', array(), array('langcode' => $langcode)),
t('@size TB', array(), array('langcode' => $langcode)),
t('@size PB', array(), array('langcode' => $langcode)),
t('@size EB', array(), array('langcode' => $langcode)),
t('@size ZB', array(), array('langcode' => $langcode)),
t('@size YB', array(), array('langcode' => $langcode)),
);
foreach ($units as $unit) {
if (round($size, 2) >= DRUPAL_KILOBYTE) {
$size = $size / DRUPAL_KILOBYTE;
}
else {
break;
}
}
return str_replace('@size', round($size, 2), $unit);
}
}
/**
* Format a time interval with the requested granularity.
*
* @param $timestamp
* The length of the interval in seconds.
* @param $granularity
* How many different units to display in the string.
* @param $langcode
* Optional language code to translate to a language other than
* what is used to display the page.
* @return
* A translated string representation of the interval.
*/
function format_interval($timestamp, $granularity = 2, $langcode = NULL) {
$units = array(
'1 year|@count years' => 31536000,
'1 month|@count months' => 2592000,
'1 week|@count weeks' => 604800,
'1 day|@count days' => 86400,
'1 hour|@count hours' => 3600,
'1 min|@count min' => 60,
'1 sec|@count sec' => 1
);
$output = '';
foreach ($units as $key => $value) {
$key = explode('|', $key);
if ($timestamp >= $value) {
$output .= ($output ? ' ' : '') . format_plural(floor($timestamp / $value), $key[0], $key[1], array(), array('langcode' => $langcode));
$timestamp %= $value;
$granularity--; }
if ($granularity == 0) {
break;
}
}
return $output ? $output : t('0 sec', array(), array('langcode' => $langcode));
}
/**
* Formats a date, using a date type or a custom date format string.
*
* @param $timestamp
* A UNIX timestamp to format.
* @param $type
* (optional) The format to use, one of:
* - 'short', 'medium', or 'long' (the corresponding built-in date formats).
* - The name of a date type defined by a module in hook_date_format_types(),
* if it's been assigned a format.
* - The machine name of an administrator-defined date format.
* - 'custom', to use $format.
* Defaults to 'medium'.
* @param $format
* (optional) If $type is 'custom', a PHP date format string suitable for
* input to date(). Use a backslash to escape ordinary text, so it does not
* get interpreted as date format characters.
* @param $timezone
* (optional) Time zone identifier, as described at
* http://php.net/manual/en/timezones.php Defaults to the time zone used to
* display the page.
* @param $langcode
* (optional) Language code to translate to. Defaults to the language used to
* display the page.
*
* @return
* A translated date string in the requested format.
*/
function format_date($timestamp, $type = 'medium', $format = '', $timezone = NULL, $langcode = NULL) {
// Use the advanced drupal_static() pattern, since this is called very often.
static $drupal_static_fast;
if (!isset($drupal_static_fast)) {
$drupal_static_fast['timezones'] = &drupal_static(__FUNCTION__);
}
$timezones = &$drupal_static_fast['timezones'];
if (!isset($timezone)) {
$timezone = date_default_timezone_get();
}
// Store DateTimeZone objects in an array rather than repeatedly
// constructing identical objects over the life of a request.
if (!isset($timezones[$timezone])) {
$timezones[$timezone] = timezone_open($timezone);
}
// Use the default langcode if none is set.
global $language;
if (empty($langcode)) {
$langcode = isset($language->language) ? $language->language : 'en';
}
switch ($type) {
case 'short':
$format = variable_get('date_format_short', 'm/d/Y - H:i');
break;
case 'long':
$format = variable_get('date_format_long', 'l, F j, Y - H:i');
break;
case 'custom': // No change to format.
break;
case 'medium':
default:
// Retrieve the format of the custom $type passed.
if ($type != 'medium') {
$format = variable_get('date_format_' . $type, '');
}
// Fall back to 'medium'.
if ($format === '') {
$format = variable_get('date_format_medium', 'D, m/d/Y - H:i');
}
break;
}
// Create a DateTime object from the timestamp.
$date_time = date_create('@' . $timestamp);
// Set the time zone for the DateTime object.
date_timezone_set($date_time, $timezones[$timezone]);
// Encode markers that should be translated. 'A' becomes '\xEF\AA\xFF'.
// xEF and xFF are invalid UTF-8 sequences, and we assume they are not in the
// input string.
// Paired backslashes are isolated to prevent errors in read-ahead evaluation.
// The read-ahead expression ensures that A matches, but not \A.
$format = preg_replace(array('/\\\\\\\\/', '/(?<!\\\\)([AaeDlMTF])/'), array("\xEF\\\\\\\\\xFF", "\xEF\\\\\$1\$1\xFF"), $format);
// Call date_format().
$format = date_format($date_time, $format);
// Pass the langcode to _format_date_callback().
_format_date_callback(NULL, $langcode);
// Translate the marked sequences.
return preg_replace_callback('/\xEF([AaeDlMTF]?)(.*?)\xFF/', '_format_date_callback', $format);
}
/**
* Returns an ISO8601 formatted date based on the given date.
*
* Can be used as a callback for RDF mappings.
*
* @param $date
* A UNIX timestamp.
* @return string
* An ISO8601 formatted date.
*/
function date_iso8601($date) {
// The DATE_ISO8601 constant cannot be used here because it does not match
// date('c') and produces invalid RDF markup.
return date('c', $date);
}
/**
* Callback function for preg_replace_callback().
*/
function _format_date_callback(array $matches = NULL, $new_langcode = NULL) {
// We cache translations to avoid redundant and rather costly calls to t().
static $cache, $langcode;
if (!isset($matches)) {
$langcode = $new_langcode;
return;
}
$code = $matches[1];
$string = $matches[2];
if (!isset($cache[$langcode][$code][$string])) { $options = array(
'langcode' => $langcode,
);
if ($code == 'F') {
$options['context'] = 'Long month name';
}
if ($code == '') {
$cache[$langcode][$code][$string] = $string;
}
else {
$cache[$langcode][$code][$string] = t($string, array(), $options);
}
}
return $cache[$langcode][$code][$string];
}
/**
* Format a username.
*
* By default, the passed-in object's 'name' property is used if it exists, or
* else, the site-defined value for the 'anonymous' variable. However, a module
* may override this by implementing hook_username_alter(&$name, $account).
*
* @see hook_username_alter()
*
* @param $account
* The account object for the user whose name is to be formatted.
*
* @return
* An unsanitized string with the username to display. The code receiving
* this result must ensure that check_plain() is called on it before it is
* printed to the page.
*/
function format_username($account) {
$name = !empty($account->name) ? $account->name : variable_get('anonymous', t('Anonymous'));
drupal_alter('username', $name, $account);
return $name;
}
/**
* @} End of "defgroup format".
*/
/**
* Generates an internal or external URL.
*
* When creating links in modules, consider whether l() could be a better
* alternative than url().
*
* @param $path
* The internal path or external URL being linked to, such as "node/34" or
* "http://example.com/foo". A few notes:
* - If you provide a full URL, it will be considered an external URL.
* - If you provide only the path (e.g. "node/34"), it will be
* considered an internal link. In this case, it should be a system URL,
* and it will be replaced with the alias, if one exists. Additional query
* arguments for internal paths must be supplied in $options['query'], not
* included in $path.
* - If you provide an internal path and $options['alias'] is set to TRUE, the
* path is assumed already to be the correct path alias, and the alias is
* not looked up.
* - The special string '<front>' generates a link to the site's base URL.
* - If your external URL contains a query (e.g. http://example.com/foo?a=b),
* then you can either URL encode the query keys and values yourself and
* include them in $path, or use $options['query'] to let this function
* URL encode them.
* @param $options
* An associative array of additional options, with the following elements: * - 'query': An array of query key/value-pairs (without any URL-encoding) to
* append to the URL.
* - 'fragment': A fragment identifier (named anchor) to append to the URL.
* Do not include the leading '#' character.
* - 'absolute': Defaults to FALSE. Whether to force the output to be an
* absolute link (beginning with http:). Useful for links that will be
* displayed outside the site, such as in an RSS feed.
* - 'alias': Defaults to FALSE. Whether the given path is a URL alias
* already.
* - 'external': Whether the given path is an external URL.
* - 'language': An optional language object. If the path being linked to is
* internal to the site, $options['language'] is used to look up the alias
* for the URL. If $options['language'] is omitted, the global $language_url
* will be used.
* - 'https': Whether this URL should point to a secure location. If not
* defined, the current scheme is used, so the user stays on http or https
* respectively. TRUE enforces HTTPS and FALSE enforces HTTP, but HTTPS can
* only be enforced when the variable 'https' is set to TRUE.
* - 'base_url': Only used internally, to modify the base URL when a language
* dependent URL requires so.
* - 'prefix': Only used internally, to modify the path when a language
* dependent URL requires so.
* - 'script': The script filename in Drupal's root directory to use when
* clean URLs are disabled, such as 'index.php'. Defaults to an empty
* string, as most modern web servers automatically find 'index.php'. If
* clean URLs are disabled, the value of $path is appended as query
* parameter 'q' to $options['script'] in the returned URL. When deploying
* Drupal on a web server that cannot be configured to automatically find
* index.php, then hook_url_outbound_alter() can be implemented to force
* this value to 'index.php'.
* - 'entity_type': The entity type of the object that called url(). Only set if
* url() is invoked by entity_uri().
* - 'entity': The entity object (such as a node) for which the URL is being
* generated. Only set if url() is invoked by entity_uri().
*
* @return
* A string containing a URL to the given path.
*/
function url($path = NULL, array $options = array()) {
// Merge in defaults.
$options += array(
'fragment' => '',
'query' => array(),
'absolute' => FALSE,
'alias' => FALSE,
'prefix' => ''
);
if (!isset($options['external'])) {
// Return an external link if $path contains an allowed absolute URL. Only
// call the slow drupal_strip_dangerous_protocols() if $path contains a ':'
// before any / ? or #. Note: we could use url_is_external($path) here, but
// that would require another function call, and performance inside url() is
// critical.
$colonpos = strpos($path, ':');
$options['external'] = ($colonpos !== FALSE && !preg_match('![/?#]!', substr($path, 0, $colonpos)) && drupal_strip_dangerous_protocols($path) == $path);
}
// Preserve the original path before altering or aliasing.
$original_path = $path;
// Allow other modules to alter the outbound URL and options.
drupal_alter('url_outbound', $path, $options, $original_path);
if (isset($options['fragment']) && $options['fragment'] !== '') {
$options['fragment'] = '#' . $options['fragment'];
}
if ($options['external']) {
// Split off the fragment. if (strpos($path, '#') !== FALSE) {
list($path, $old_fragment) = explode('#', $path, 2);
// If $options contains no fragment, take it over from the path.
if (isset($old_fragment) && !$options['fragment']) {
$options['fragment'] = '#' . $old_fragment;
}
}
// Append the query.
if ($options['query']) {
$path .= (strpos($path, '?') !== FALSE ? '&' : '?') . drupal_http_build_query($options['query']);
}
if (isset($options['https']) && variable_get('https', FALSE)) {
if ($options['https'] === TRUE) {
$path = str_replace('http://', 'https://', $path);
}
elseif ($options['https'] === FALSE) {
$path = str_replace('https://', 'http://', $path);
}
}
// Reassemble.
return $path . $options['fragment'];
}
global $base_url, $base_secure_url, $base_insecure_url;
// The base_url might be rewritten from the language rewrite in domain mode.
if (!isset($options['base_url'])) {
if (isset($options['https']) && variable_get('https', FALSE)) {
if ($options['https'] === TRUE) {
$options['base_url'] = $base_secure_url;
$options['absolute'] = TRUE;
}
elseif ($options['https'] === FALSE) {
$options['base_url'] = $base_insecure_url;
$options['absolute'] = TRUE;
}
}
else {
$options['base_url'] = $base_url;
}
}
// The special path '<front>' links to the default front page.
if ($path == '<front>') {
$path = '';
}
elseif (!empty($path) && !$options['alias']) {
$language = isset($options['language']) && isset($options['language']->language) ? $options['language']->language : '';
$alias = drupal_get_path_alias($original_path, $language);
if ($alias != $original_path) {
$path = $alias;
}
}
$base = $options['absolute'] ? $options['base_url'] . '/' : base_path();
$prefix = empty($path) ? rtrim($options['prefix'], '/') : $options['prefix'];
// With Clean URLs.
if (!empty($GLOBALS['conf']['clean_url'])) {
$path = drupal_encode_path($prefix . $path);
if ($options['query']) {
return $base . $path . '?' . drupal_http_build_query($options['query']) . $options['fragment'];
}
else {
return $base . $path . $options['fragment'];
}
}
// Without Clean URLs.
else {
$path = $prefix . $path; $query = array();
if (!empty($path)) {
$query['q'] = $path;
}
if ($options['query']) {
// We do not use array_merge() here to prevent overriding $path via query
// parameters.
$query += $options['query'];
}
$query = $query ? ('?' . drupal_http_build_query($query)) : '';
$script = isset($options['script']) ? $options['script'] : '';
return $base . $script . $query . $options['fragment'];
}
}
/**
* Return TRUE if a path is external to Drupal (e.g. http://example.com).
*
* If a path cannot be assessed by Drupal's menu handler, then we must
* treat it as potentially insecure.
*
* @param $path
* The internal path or external URL being linked to, such as "node/34" or
* "http://example.com/foo".
* @return
* Boolean TRUE or FALSE, where TRUE indicates an external path.
*/
function url_is_external($path) {
$colonpos = strpos($path, ':');
// Only call the slow drupal_strip_dangerous_protocols() if $path contains a
// ':' before any / ? or #.
return $colonpos !== FALSE && !preg_match('![/?#]!', substr($path, 0, $colonpos)) && drupal_strip_dangerous_protocols($path) == $path;
}
/**
* Format an attribute string for a HTTP header.
*
* @param $attributes
* An associative array of attributes such as 'rel'.
*
* @return
* A ; separated string ready for insertion in a HTTP header. No escaping is
* performed for HTML entities, so this string is not safe to be printed.
*
* @see drupal_add_http_header()
*/
function drupal_http_header_attributes(array $attributes = array()) {
foreach ($attributes as $attribute => &$data) {
if (is_array($data)) {
$data = implode(' ', $data);
}
$data = $attribute . '="' . $data . '"';
}
return $attributes ? ' ' . implode('; ', $attributes) : '';
}
/**
* Converts an associative array to an attribute string for use in XML/HTML tags.
*
* Each array key and its value will be formatted into an attribute string.
* If a value is itself an array, then its elements are concatenated to a single
* space-delimited string (for example, a class attribute with multiple values).
*
* Attribute values are sanitized by running them through check_plain().
* Attribute names are not automatically sanitized. When using user-supplied
* attribute names, it is strongly recommended to allow only white-listed names,
* since certain attributes carry security risks and can be abused.
*
* Examples of security aspects when using drupal_attributes:
* @code * // By running the value in the following statement through check_plain,
* // the malicious script is neutralized.
* drupal_attributes(array('title' => t('<script>steal_cookie();</script>')));
*
* // The statement below demonstrates dangerous use of drupal_attributes, and
* // will return an onmouseout attribute with JavaScript code that, when used
* // as attribute in a tag, will cause users to be redirected to another site.
* //
* // In this case, the 'onmouseout' attribute should not be whitelisted --
* // you don't want users to have the ability to add this attribute or others
* // that take JavaScript commands.
* drupal_attributes(array('onmouseout' => 'window.location="http://malicious.com/";')));
* @endcode
*
* @param $attributes
* An associative array of key-value pairs to be converted to attributes.
*
* @return
* A string ready for insertion in a tag (starts with a space).
*
* @ingroup sanitization
*/
function drupal_attributes(array $attributes = array()) {
foreach ($attributes as $attribute => &$data) {
$data = implode(' ', (array) $data);
$data = $attribute . '="' . check_plain($data) . '"';
}
return $attributes ? ' ' . implode(' ', $attributes) : '';
}
/**
* Formats an internal or external URL link as an HTML anchor tag.
*
* This function correctly handles aliased paths, and adds an 'active' class
* attribute to links that point to the current page (for theming), so all
* internal links output by modules should be generated by this function if
* possible.
*
* @param $text
* The link text for the anchor tag.
* @param $path
* The internal path or external URL being linked to, such as "node/34" or
* "http://example.com/foo". After the url() function is called to construct
* the URL from $path and $options, the resulting URL is passed through
* check_plain() before it is inserted into the HTML anchor tag, to ensure
* well-formed HTML. See url() for more information and notes.
* @param array $options
* An associative array of additional options, with the following elements:
* - 'attributes': An associative array of HTML attributes to apply to the
* anchor tag. If element 'class' is included, it must be an array; 'title'
* must be a string; other elements are more flexible, as they just need
* to work in a call to drupal_attributes($options['attributes']).
* - 'html' (default FALSE): Whether $text is HTML or just plain-text. For
* example, to make an image tag into a link, this must be set to TRUE, or
* you will see the escaped HTML image tag. $text is not sanitized if
* 'html' is TRUE. The calling function must ensure that $text is already
* safe.
* - 'language': An optional language object. If the path being linked to is
* internal to the site, $options['language'] is used to determine whether
* the link is "active", or pointing to the current page (the language as
* well as the path must match). This element is also used by url().
* - Additional $options elements used by the url() function.
*
* @return
* An HTML string containing a link to the given path.
*/
function l($text, $path, array $options = array()) {
global $language_url;
static $use_theme = NULL;
// Merge in defaults.
$options += array(
'attributes' => array(),
'html' => FALSE,
);
// Append active class.
if (($path == $_GET['q'] || ($path == '<front>' && drupal_is_front_page())) &&
(empty($options['language']) || $options['language']->language == $language_url->language)) {
$options['attributes']['class'][] = 'active';
}
// Remove all HTML and PHP tags from a tooltip. For best performance, we act only
// if a quick strpos() pre-check gave a suspicion (because strip_tags() is expensive).
if (isset($options['attributes']['title']) && strpos($options['attributes']['title'], '<') !== FALSE) {
$options['attributes']['title'] = strip_tags($options['attributes']['title']);
}
// Determine if rendering of the link is to be done with a theme function
// or the inline default. Inline is faster, but if the theme system has been
// loaded and a module or theme implements a preprocess or process function
// or overrides the theme_link() function, then invoke theme(). Preliminary
// benchmarks indicate that invoking theme() can slow down the l() function
// by 20% or more, and that some of the link-heavy Drupal pages spend more
// than 10% of the total page request time in the l() function.
if (!isset($use_theme) && function_exists('theme')) {
// Allow edge cases to prevent theme initialization and force inline link
// rendering.
if (variable_get('theme_link', TRUE)) {
drupal_theme_initialize();
$registry = theme_get_registry();
// We don't want to duplicate functionality that's in theme(), so any
// hint of a module or theme doing anything at all special with the 'link'
// theme hook should simply result in theme() being called. This includes
// the overriding of theme_link() with an alternate function or template,
// the presence of preprocess or process functions, or the presence of
// include files.
$use_theme = !isset($registry['link']['function']) || ($registry['link']['function'] != 'theme_link');
$use_theme = $use_theme || !empty($registry['link']['preprocess functions']) || !empty($registry['link']['process functions']) || !empty($registry['link']['includes']);
}
else {
$use_theme = FALSE;
}
}
if ($use_theme) {
return theme('link', array('text' => $text, 'path' => $path, 'options' => $options));
}
// The result of url() is a plain-text URL. Because we are using it here
// in an HTML argument context, we need to encode it properly.
return '<a href="' . check_plain(url($path, $options)) . '"' . drupal_attributes($options['attributes']) . '>' . ($options['html'] ? $text : check_plain($text)) . '</a>';
}
/**
* Delivers a page callback result to the browser in the appropriate format.
*
* This function is most commonly called by menu_execute_active_handler(), but
* can also be called by error conditions such as drupal_not_found(),
* drupal_access_denied(), and drupal_site_offline().
*
* When a user requests a page, index.php calls menu_execute_active_handler(),
* which calls the 'page callback' function registered in hook_menu(). The page
* callback function can return one of:
* - NULL: to indicate no content.
* - An integer menu status constant: to indicate an error condition.
* - A string of HTML content.
* - A renderable array of content.
* Returning a renderable array rather than a string of HTML is preferred,
* because that provides modules with more flexibility in customizing the final
* result.
* * When the page callback returns its constructed content to
* menu_execute_active_handler(), this function gets called. The purpose of
* this function is to determine the most appropriate 'delivery callback'
* function to route the content to. The delivery callback function then
* sends the content to the browser in the needed format. The default delivery
* callback is drupal_deliver_html_page(), which delivers the content as an HTML
* page, complete with blocks in addition to the content. This default can be
* overridden on a per menu router item basis by setting 'delivery callback' in
* hook_menu() or hook_menu_alter(), and can also be overridden on a per request
* basis in hook_page_delivery_callback_alter().
*
* For example, the same page callback function can be used for an HTML
* version of the page and an Ajax version of the page. The page callback
* function just needs to decide what content is to be returned and the
* delivery callback function will send it as an HTML page or an Ajax
* response, as appropriate.
*
* In order for page callbacks to be reusable in different delivery formats,
* they should not issue any "print" or "echo" statements, but instead just
* return content.
*
* Also note that this function does not perform access checks. The delivery
* callback function specified in hook_menu(), hook_menu_alter(), or
* hook_page_delivery_callback_alter() will be called even if the router item
* access checks fail. This is intentional (it is needed for JSON and other
* purposes), but it has security implications. Do not call this function
* directly unless you understand the security implications, and be careful in
* writing delivery callbacks, so that they do not violate security. See
* drupal_deliver_html_page() for an example of a delivery callback that
* respects security.
*
* @param $page_callback_result
* The result of a page callback. Can be one of:
* - NULL: to indicate no content.
* - An integer menu status constant: to indicate an error condition.
* - A string of HTML content.
* - A renderable array of content.
* @param $default_delivery_callback
* (Optional) If given, it is the name of a delivery function most likely
* to be appropriate for the page request as determined by the calling
* function (e.g., menu_execute_active_handler()). If not given, it is
* determined from the menu router information of the current page.
*
* @see menu_execute_active_handler()
* @see hook_menu()
* @see hook_menu_alter()
* @see hook_page_delivery_callback_alter()
*/
function drupal_deliver_page($page_callback_result, $default_delivery_callback = NULL) {
if (!isset($default_delivery_callback) && ($router_item = menu_get_item())) {
$default_delivery_callback = $router_item['delivery_callback'];
}
$delivery_callback = !empty($default_delivery_callback) ? $default_delivery_callback : 'drupal_deliver_html_page';
// Give modules a chance to alter the delivery callback used, based on
// request-time context (e.g., HTTP request headers).
drupal_alter('page_delivery_callback', $delivery_callback);
if (function_exists($delivery_callback)) {
$delivery_callback($page_callback_result);
}
else {
// If a delivery callback is specified, but doesn't exist as a function,
// something is wrong, but don't print anything, since it's not known
// what format the response needs to be in.
watchdog('delivery callback not found', 'callback %callback not found: %q.', array('%callback' => $delivery_callback, '%q' => $_GET['q']), WATCHDOG_ERROR);
}
}
/**
* Package and send the result of a page callback to the browser as HTML.
* * @param $page_callback_result
* The result of a page callback. Can be one of:
* - NULL: to indicate no content.
* - An integer menu status constant: to indicate an error condition.
* - A string of HTML content.
* - A renderable array of content.
*
* @see drupal_deliver_page()
*/
function drupal_deliver_html_page($page_callback_result) {
// Emit the correct charset HTTP header, but not if the page callback
// result is NULL, since that likely indicates that it printed something
// in which case, no further headers may be sent, and not if code running
// for this page request has already set the content type header.
if (isset($page_callback_result) && is_null(drupal_get_http_header('Content-Type'))) {
drupal_add_http_header('Content-Type', 'text/html; charset=utf-8');
}
// Menu status constants are integers; page content is a string or array.
if (is_int($page_callback_result)) {
// @todo: Break these up into separate functions?
switch ($page_callback_result) {
case MENU_NOT_FOUND:
// Print a 404 page.
drupal_add_http_header('Status', '404 Not Found');
watchdog('page not found', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
// Keep old path for reference, and to allow forms to redirect to it.
if (!isset($_GET['destination'])) {
$_GET['destination'] = $_GET['q'];
}
$path = drupal_get_normal_path(variable_get('site_404', ''));
if ($path && $path != $_GET['q']) {
// Custom 404 handler. Set the active item in case there are tabs to
// display, or other dependencies on the path.
menu_set_active_item($path);
$return = menu_execute_active_handler($path, FALSE);
}
if (empty($return) || $return == MENU_NOT_FOUND || $return == MENU_ACCESS_DENIED) {
// Standard 404 handler.
drupal_set_title(t('Page not found'));
$return = t('The requested page could not be found.');
}
drupal_set_page_content($return);
$page = element_info('page');
print drupal_render_page($page);
break;
case MENU_ACCESS_DENIED:
// Print a 403 page.
drupal_add_http_header('Status', '403 Forbidden');
watchdog('access denied', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
// Keep old path for reference, and to allow forms to redirect to it.
if (!isset($_GET['destination'])) {
$_GET['destination'] = $_GET['q'];
}
$path = drupal_get_normal_path(variable_get('site_403', ''));
if ($path && $path != $_GET['q']) {
// Custom 403 handler. Set the active item in case there are tabs to
// display or other dependencies on the path.
menu_set_active_item($path);
$return = menu_execute_active_handler($path, FALSE);
}
if (empty($return) || $return == MENU_NOT_FOUND || $return == MENU_ACCESS_DENIED) {
// Standard 403 handler.
drupal_set_title(t('Access denied'));
$return = t('You are not authorized to access this page.');
}
print drupal_render_page($return);
break;
case MENU_SITE_OFFLINE:
// Print a 503 page.
drupal_maintenance_theme();
drupal_add_http_header('Status', '503 Service unavailable');
drupal_set_title(t('Site under maintenance'));
print theme('maintenance_page', array('content' => filter_xss_admin(variable_get('maintenance_mode_message',
t('@site is currently under maintenance. We should be back shortly. Thank you for your patience.', array('@site' => variable_get('site_name', 'Drupal')))))));
break;
}
}
elseif (isset($page_callback_result)) {
// Print anything besides a menu constant, assuming it's not NULL or
// undefined.
print drupal_render_page($page_callback_result);
}
// Perform end-of-request tasks.
drupal_page_footer();
}
/**
* Perform end-of-request tasks.
*
* This function sets the page cache if appropriate, and allows modules to
* react to the closing of the page by calling hook_exit().
*/
function drupal_page_footer() {
global $user;
module_invoke_all('exit');
// Commit the user session, if needed.
drupal_session_commit();
if (variable_get('cache', 0) && ($cache = drupal_page_set_cache())) {
drupal_serve_page_from_cache($cache);
}
else {
ob_flush();
}
_registry_check_code(REGISTRY_WRITE_LOOKUP_CACHE);
drupal_cache_system_paths();
module_implements_write_cache();
system_run_automated_cron();
}
/**
* Perform end-of-request tasks.
*
* In some cases page requests need to end without calling drupal_page_footer().
* In these cases, call drupal_exit() instead. There should rarely be a reason
* to call exit instead of drupal_exit();
*
* @param $destination
* If this function is called from drupal_goto(), then this argument
* will be a fully-qualified URL that is the destination of the redirect.
* This should be passed along to hook_exit() implementations.
*/
function drupal_exit($destination = NULL) {
if (drupal_get_bootstrap_phase() == DRUPAL_BOOTSTRAP_FULL) { if (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') {
module_invoke_all('exit', $destination);
}
drupal_session_commit();
}
exit;
}
/**
* Form an associative array from a linear array.
*
* This function walks through the provided array and constructs an associative
* array out of it. The keys of the resulting array will be the values of the
* input array. The values will be the same as the keys unless a function is
* specified, in which case the output of the function is used for the values
* instead.
*
* @param $array
* A linear array.
* @param $function
* A name of a function to apply to all values before output.
*
* @return
* An associative array.
*/
function drupal_map_assoc($array, $function = NULL) {
// array_combine() fails with empty arrays:
// http://bugs.php.net/bug.php?id=34857.
$array = !empty($array) ? array_combine($array, $array) : array();
if (is_callable($function)) {
$array = array_map($function, $array);
}
return $array;
}
/**
* Attempts to set the PHP maximum execution time.
*
* This function is a wrapper around the PHP function set_time_limit().
* When called, set_time_limit() restarts the timeout counter from zero.
* In other words, if the timeout is the default 30 seconds, and 25 seconds
* into script execution a call such as set_time_limit(20) is made, the
* script will run for a total of 45 seconds before timing out.
*
* It also means that it is possible to decrease the total time limit if
* the sum of the new time limit and the current time spent running the
* script is inferior to the original time limit. It is inherent to the way
* set_time_limit() works, it should rather be called with an appropriate
* value every time you need to allocate a certain amount of time
* to execute a task than only once at the beginning of the script.
*
* Before calling set_time_limit(), we check if this function is available
* because it could be disabled by the server administrator. We also hide all
* the errors that could occur when calling set_time_limit(), because it is
* not possible to reliably ensure that PHP or a security extension will
* not issue a warning/error if they prevent the use of this function.
*
* @param $time_limit
* An integer specifying the new time limit, in seconds. A value of 0
* indicates unlimited execution time.
*
* @ingroup php_wrappers
*/
function drupal_set_time_limit($time_limit) {
if (function_exists('set_time_limit')) {
@set_time_limit($time_limit);
}
}
/** * Returns the path to a system item (module, theme, etc.).
*
* @param $type
* The type of the item (i.e. theme, theme_engine, module, profile).
* @param $name
* The name of the item for which the path is requested.
*
* @return
* The path to the requested item.
*/
function drupal_get_path($type, $name) {
return dirname(drupal_get_filename($type, $name));
}
/**
* Return the base URL path (i.e., directory) of the Drupal installation.
*
* base_path() prefixes and suffixes a "/" onto the returned path if the path is
* not empty. At the very least, this will return "/".
*
* Examples:
* - http://example.com returns "/" because the path is empty.
* - http://example.com/drupal/folder returns "/drupal/folder/".
*/
function base_path() {
return $GLOBALS['base_path'];
}
/**
* Add a LINK tag with a distinct 'rel' attribute to the page's HEAD.
*
* This function can be called as long the HTML header hasn't been sent,
* which on normal pages is up through the preprocess step of theme('html').
* Adding a link will overwrite a prior link with the exact same 'rel' and
* 'href' attributes.
*
* @param $attributes
* Associative array of element attributes including 'href' and 'rel'.
* @param $header
* Optional flag to determine if a HTTP 'Link:' header should be sent.
*/
function drupal_add_html_head_link($attributes, $header = FALSE) {
$element = array(
'#tag' => 'link',
'#attributes' => $attributes,
);
$href = $attributes['href'];
if ($header) {
// Also add a HTTP header "Link:".
$href = '<' . check_plain($attributes['href']) . '>;';
unset($attributes['href']);
$element['#attached']['drupal_add_http_header'][] = array('Link', $href . drupal_http_header_attributes($attributes), TRUE);
}
drupal_add_html_head($element, 'drupal_add_html_head_link:' . $attributes['rel'] . ':' . $href);
}
/**
* Adds a cascading stylesheet to the stylesheet queue.
*
* Calling drupal_static_reset('drupal_add_css') will clear all cascading
* stylesheets added so far.
*
* If CSS aggregation/compression is enabled, all cascading style sheets added
* with $options['preprocess'] set to TRUE will be merged into one aggregate
* file and compressed by removing all extraneous white space.
* Preprocessed inline stylesheets will not be aggregated into this single file;
* instead, they are just compressed upon output on the page. Externally hosted
* stylesheets are never aggregated or compressed. *
* The reason for aggregating the files is outlined quite thoroughly here:
* http://www.die.net/musings/page_load_time/ "Load fewer external objects. Due
* to request overhead, one bigger file just loads faster than two smaller ones
* half its size."
*
* $options['preprocess'] should be only set to TRUE when a file is required for
* all typical visitors and most pages of a site. It is critical that all
* preprocessed files are added unconditionally on every page, even if the
* files do not happen to be needed on a page. This is normally done by calling
* drupal_add_css() in a hook_init() implementation.
*
* Non-preprocessed files should only be added to the page when they are
* actually needed.
*
* @param $data
* (optional) The stylesheet data to be added, depending on what is passed
* through to the $options['type'] parameter:
* - 'file': The path to the CSS file relative to the base_path(), or a
* stream wrapper URI. For example: "modules/devel/devel.css" or
* "public://generated_css/stylesheet_1.css". Note that Modules should
* always prefix the names of their CSS files with the module name; for
* example, system-menus.css rather than simply menus.css. Themes can
* override module-supplied CSS files based on their filenames, and this
* prefixing helps prevent confusing name collisions for theme developers.
* See drupal_get_css() where the overrides are performed. Also, if the
* direction of the current language is right-to-left (Hebrew, Arabic,
* etc.), the function will also look for an RTL CSS file and append it to
* the list. The name of this file should have an '-rtl.css' suffix. For
* example a CSS file called 'mymodule-name.css' will have a
* 'mymodule-name-rtl.css' file added to the list, if exists in the same
* directory. This CSS file should contain overrides for properties which
* should be reversed or otherwise different in a right-to-left display.
* - 'inline': A string of CSS that should be placed in the given scope. Note
* that it is better practice to use 'file' stylesheets, rather than
* 'inline', as the CSS would then be aggregated and cached.
* - 'external': The absolute path to an external CSS file that is not hosted
* on the local server. These files will not be aggregated if CSS
* aggregation is enabled.
* @param $options
* (optional) A string defining the 'type' of CSS that is being added in the
* $data parameter ('file', 'inline', or 'external'), or an array which can
* have any or all of the following keys:
* - 'type': The type of stylesheet being added. Available options are 'file',
* 'inline' or 'external'. Defaults to 'file'.
* - 'basename': Force a basename for the file being added. Modules are
* expected to use stylesheets with unique filenames, but integration of
* external libraries may make this impossible. The basename of
* 'modules/node/node.css' is 'node.css'. If the external library "node.js"
* ships with a 'node.css', then a different, unique basename would be
* 'node.js.css'.
* - 'group': A number identifying the group in which to add the stylesheet.
* Available constants are:
* - CSS_SYSTEM: Any system-layer CSS.
* - CSS_DEFAULT: Any module-layer CSS.
* - CSS_THEME: Any theme-layer CSS.
* The group number serves as a weight: the markup for loading a stylesheet
* within a lower weight group is output to the page before the markup for
* loading a stylesheet within a higher weight group, so CSS within higher
* weight groups take precendence over CSS within lower weight groups.
* - 'every_page': For optimal front-end performance when aggregation is
* enabled, this should be set to TRUE if the stylesheet is present on every
* page of the website for users for whom it is present at all. This
* defaults to FALSE. It is set to TRUE for stylesheets added via module and
* theme .info files. Modules that add stylesheets within hook_init()
* implementations, or from other code that ensures that the stylesheet is
* added to all website pages, should also set this flag to TRUE. All
* stylesheets within the same group that have the 'every_page' flag set to
* TRUE and do not have 'preprocess' set to FALSE are aggregated together
* into a single aggregate file, and that aggregate file can be reused * across a user's entire site visit, leading to faster navigation between
* pages. However, stylesheets that are only needed on pages less frequently
* visited, can be added by code that only runs for those particular pages,
* and that code should not set the 'every_page' flag. This minimizes the
* size of the aggregate file that the user needs to download when first
* visiting the website. Stylesheets without the 'every_page' flag are
* aggregated into a separate aggregate file. This other aggregate file is
* likely to change from page to page, and each new aggregate file needs to
* be downloaded when first encountered, so it should be kept relatively
* small by ensuring that most commonly needed stylesheets are added to
* every page.
* - 'weight': The weight of the stylesheet specifies the order in which the
* CSS will appear relative to other stylesheets with the same group and
* 'every_page' flag. The exact ordering of stylesheets is as follows:
* - First by group.
* - Then by the 'every_page' flag, with TRUE coming before FALSE.
* - Then by weight.
* - Then by the order in which the CSS was added. For example, all else
* being the same, a stylesheet added by a call to drupal_add_css() that
* happened later in the page request gets added to the page after one for
* which drupal_add_css() happened earlier in the page request.
* - 'media': The media type for the stylesheet, e.g., all, print, screen.
* Defaults to 'all'.
* - 'preprocess': If TRUE and CSS aggregation/compression is enabled, the
* styles will be aggregated and compressed. Defaults to TRUE.
* - 'browsers': An array containing information specifying which browsers
* should load the CSS item. See drupal_pre_render_conditional_comments()
* for details.
*
* @return
* An array of queued cascading stylesheets.
*
* @see drupal_get_css()
*/
function drupal_add_css($data = NULL, $options = NULL) {
$css = &drupal_static(__FUNCTION__, array());
// Construct the options, taking the defaults into consideration.
if (isset($options)) {
if (!is_array($options)) {
$options = array('type' => $options);
}
}
else {
$options = array();
}
// Create an array of CSS files for each media type first, since each type needs to be served
// to the browser differently.
if (isset($data)) {
$options += array(
'type' => 'file',
'group' => CSS_DEFAULT,
'weight' => 0,
'every_page' => FALSE,
'media' => 'all',
'preprocess' => TRUE,
'data' => $data,
'browsers' => array(),
);
$options['browsers'] += array(
'IE' => TRUE,
'!IE' => TRUE,
);
// Files with a query string cannot be preprocessed.
if ($options['type'] === 'file' && $options['preprocess'] && strpos($options['data'], '?') !== FALSE) {
$options['preprocess'] = FALSE;
}
// Always add a tiny value to the weight, to conserve the insertion order.
$options['weight'] += count($css) / 1000;
// Add the data to the CSS array depending on the type.
switch ($options['type']) {
case 'inline':
// For inline stylesheets, we don't want to use the $data as the array
// key as $data could be a very long string of CSS.
$css[] = $options;
break;
default:
// Local and external files must keep their name as the associative key
// so the same CSS file is not be added twice.
$css[$data] = $options;
}
}
return $css;
}
/**
* Returns a themed representation of all stylesheets that should be attached to the page.
*
* It loads the CSS in order, with 'module' first, then 'theme' afterwards.
* This ensures proper cascading of styles so themes can easily override
* module styles through CSS selectors.
*
* Themes may replace module-defined CSS files by adding a stylesheet with the
* same filename. For example, themes/bartik/system-menus.css would replace
* modules/system/system-menus.css. This allows themes to override complete
* CSS files, rather than specific selectors, when necessary.
*
* If the original CSS file is being overridden by a theme, the theme is
* responsible for supplying an accompanying RTL CSS file to replace the
* module's.
*
* @param $css
* (optional) An array of CSS files. If no array is provided, the default
* stylesheets array is used instead.
* @param $skip_alter
* (optional) If set to TRUE, this function skips calling drupal_alter() on
* $css, useful when the calling function passes a $css array that has already
* been altered.
*
* @return
* A string of XHTML CSS tags.
*
* @see drupal_add_css()
*/
function drupal_get_css($css = NULL, $skip_alter = FALSE) {
if (!isset($css)) {
$css = drupal_add_css();
}
// Allow modules and themes to alter the CSS items.
if (!$skip_alter) {
drupal_alter('css', $css);
}
// Sort CSS items, so that they appear in the correct order.
uasort($css, 'drupal_sort_css_js');
// Remove the overridden CSS files. Later CSS files override former ones.
$previous_item = array();
foreach ($css as $key => $item) {
if ($item['type'] == 'file') {
// If defined, force a unique basename for this file.
$basename = isset($item['basename']) ? $item['basename'] : basename($item['data']);
if (isset($previous_item[$basename])) {
// Remove the previous item that shared the same base name. unset($css[$previous_item[$basename]]);
}
$previous_item[$basename] = $key;
}
}
// Render the HTML needed to load the CSS.
$styles = array(
'#type' => 'styles',
'#items' => $css,
);
// Provide the page with information about the individual CSS files used,
// information not otherwise available when CSS aggregation is enabled.
$setting['ajaxPageState']['css'] = array_fill_keys(array_keys($css), 1);
$styles['#attached']['js'][] = array('type' => 'setting', 'data' => $setting);
return drupal_render($styles);
}
/**
* Function used by uasort to sort the array structures returned by drupal_add_css() and drupal_add_js().
*
* This sort order helps optimize front-end performance while providing modules
* and themes with the necessary control for ordering the CSS and JavaScript
* appearing on a page.
*/
function drupal_sort_css_js($a, $b) {
// First order by group, so that, for example, all items in the CSS_SYSTEM
// group appear before items in the CSS_DEFAULT group, which appear before
// all items in the CSS_THEME group. Modules may create additional groups by
// defining their own constants.
if ($a['group'] < $b['group']) {
return -1;
}
elseif ($a['group'] > $b['group']) {
return 1;
}
// Within a group, order all infrequently needed, page-specific files after
// common files needed throughout the website. Separating this way allows for
// the aggregate file generated for all of the common files to be reused
// across a site visit without being cut by a page using a less common file.
elseif ($a['every_page'] && !$b['every_page']) {
return -1;
}
elseif (!$a['every_page'] && $b['every_page']) {
return 1;
}
// Finally, order by weight.
elseif ($a['weight'] < $b['weight']) {
return -1;
}
elseif ($a['weight'] > $b['weight']) {
return 1;
}
else {
return 0;
}
}
/**
* Default callback to group CSS items.
*
* This function arranges the CSS items that are in the #items property of the
* styles element into groups. Arranging the CSS items into groups serves two
* purposes. When aggregation is enabled, files within a group are aggregated
* into a single file, significantly improving page loading performance by
* minimizing network traffic overhead. When aggregation is disabled, grouping
* allows multiple files to be loaded from a single STYLE tag, enabling sites
* with many modules enabled or a complex theme being used to stay within IE's * 31 CSS inclusion tag limit: http://drupal.org/node/228818.
*
* This function puts multiple items into the same group if they are groupable
* and if they are for the same 'media' and 'browsers'. Items of the 'file' type
* are groupable if their 'preprocess' flag is TRUE, items of the 'inline' type
* are always groupable, and items of the 'external' type are never groupable.
* This function also ensures that the process of grouping items does not change
* their relative order. This requirement may result in multiple groups for the
* same type, media, and browsers, if needed to accomodate other items in
* between.
*
* @param $css
* An array of CSS items, as returned by drupal_add_css(), but after
* alteration performed by drupal_get_css().
*
* @return
* An array of CSS groups. Each group contains the same keys (e.g., 'media',
* 'data', etc.) as a CSS item from the $css parameter, with the value of
* each key applying to the group as a whole. Each group also contains an
* 'items' key, which is the subset of items from $css that are in the group.
*
* @see drupal_pre_render_styles()
*/
function drupal_group_css($css) {
$groups = array();
// If a group can contain multiple items, we track the information that must
// be the same for each item in the group, so that when we iterate the next
// item, we can determine if it can be put into the current group, or if a
// new group needs to be made for it.
$current_group_keys = NULL;
// When creating a new group, we pre-increment $i, so by initializing it to
// -1, the first group will have index 0.
$i = -1;
foreach ($css as $item) {
// The browsers for which the CSS item needs to be loaded is part of the
// information that determines when a new group is needed, but the order of
// keys in the array doesn't matter, and we don't want a new group if all
// that's different is that order.
ksort($item['browsers']);
// If the item can be grouped with other items, set $group_keys to an array
// of information that must be the same for all items in its group. If the
// item can't be grouped with other items, set $group_keys to FALSE. We
// put items into a group that can be aggregated together: whether they will
// be aggregated is up to the _drupal_css_aggregate() function or an
// override of that function specified in hook_css_alter(), but regardless
// of the details of that function, a group represents items that can be
// aggregated. Since a group may be rendered with a single HTML tag, all
// items in the group must share the same information that would need to be
// part of that HTML tag.
switch ($item['type']) {
case 'file':
// Group file items if their 'preprocess' flag is TRUE.
// Help ensure maximum reuse of aggregate files by only grouping
// together items that share the same 'group' value and 'every_page'
// flag. See drupal_add_css() for details about that.
$group_keys = $item['preprocess'] ? array($item['type'], $item['group'], $item['every_page'], $item['media'], $item['browsers']) : FALSE;
break;
case 'inline':
// Always group inline items.
$group_keys = array($item['type'], $item['media'], $item['browsers']);
break;
case 'external':
// Do not group external items.
$group_keys = FALSE;
break;
}
// If the group keys don't match the most recent group we're working with,
// then a new group must be made. if ($group_keys !== $current_group_keys) {
$i++;
// Initialize the new group with the same properties as the first item
// being placed into it. The item's 'data' and 'weight' properties are
// unique to the item and should not be carried over to the group.
$groups[$i] = $item;
unset($groups[$i]['data'], $groups[$i]['weight']);
$groups[$i]['items'] = array();
$current_group_keys = $group_keys ? $group_keys : NULL;
}
// Add the item to the current group.
$groups[$i]['items'][] = $item;
}
return $groups;
}
/**
* Default callback to aggregate CSS files and inline content.
*
* Having the browser load fewer CSS files results in much faster page loads
* than when it loads many small files. This function aggregates files within
* the same group into a single file unless the site-wide setting to do so is
* disabled (commonly the case during site development). To optimize download,
* it also compresses the aggregate files by removing comments, whitespace, and
* other unnecessary content. Additionally, this functions aggregates inline
* content together, regardless of the site-wide aggregation setting.
*
* @param $css_groups
* An array of CSS groups as returned by drupal_group_css(). This function
* modifies the group's 'data' property for each group that is aggregated.
*
* @see drupal_group_css()
* @see drupal_pre_render_styles()
*/
function drupal_aggregate_css(&$css_groups) {
$preprocess_css = (variable_get('preprocess_css', FALSE) && (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update'));
// For each group that needs aggregation, aggregate its items.
foreach ($css_groups as $key => $group) {
switch ($group['type']) {
// If a file group can be aggregated into a single file, do so, and set
// the group's data property to the file path of the aggregate file.
case 'file':
if ($group['preprocess'] && $preprocess_css) {
$css_groups[$key]['data'] = drupal_build_css_cache($group['items']);
}
break;
// Aggregate all inline CSS content into the group's data property.
case 'inline':
$css_groups[$key]['data'] = '';
foreach ($group['items'] as $item) {
$css_groups[$key]['data'] .= drupal_load_stylesheet_content($item['data'], $item['preprocess']);
}
break;
}
}
}
/**
* #pre_render callback to add the elements needed for CSS tags to be rendered.
*
* For production websites, LINK tags are preferable to STYLE tags with @import
* statements, because:
* - They are the standard tag intended for linking to a resource.
* - On Firefox 2 and perhaps other browsers, CSS files included with @import
* statements don't get saved when saving the complete web page for offline
* use: http://drupal.org/node/145218.
* - On IE, if only LINK tags and no @import statements are used, all the CSS
* files are downloaded in parallel, resulting in faster page load, but if * @import statements are used and span across multiple STYLE tags, all the
* ones from one STYLE tag must be downloaded before downloading begins for
* the next STYLE tag. Furthermore, IE7 does not support media declaration on
* the @import statement, so multiple STYLE tags must be used when different
* files are for different media types. Non-IE browsers always download in
* parallel, so this is an IE-specific performance quirk:
* http://www.stevesouders.com/blog/2009/04/09/dont-use-import/.
*
* However, IE has an annoying limit of 31 total CSS inclusion tags
* (http://drupal.org/node/228818) and LINK tags are limited to one file per
* tag, whereas STYLE tags can contain multiple @import statements allowing
* multiple files to be loaded per tag. When CSS aggregation is disabled, a
* Drupal site can easily have more than 31 CSS files that need to be loaded, so
* using LINK tags exclusively would result in a site that would display
* incorrectly in IE. Depending on different needs, different strategies can be
* employed to decide when to use LINK tags and when to use STYLE tags.
*
* The strategy employed by this function is to use LINK tags for all aggregate
* files and for all files that cannot be aggregated (e.g., if 'preprocess' is
* set to FALSE or the type is 'external'), and to use STYLE tags for groups
* of files that could be aggregated together but aren't (e.g., if the site-wide
* aggregation setting is disabled). This results in all LINK tags when
* aggregation is enabled, a guarantee that as many or only slightly more tags
* are used with aggregation disabled than enabled (so that if the limit were to
* be crossed with aggregation enabled, the site developer would also notice the
* problem while aggregation is disabled), and an easy way for a developer to
* view HTML source while aggregation is disabled and know what files will be
* aggregated together when aggregation becomes enabled.
*
* This function evaluates the aggregation enabled/disabled condition on a group
* by group basis by testing whether an aggregate file has been made for the
* group rather than by testing the site-wide aggregation setting. This allows
* this function to work correctly even if modules have implemented custom
* logic for grouping and aggregating files.
*
* @param $element
* A render array containing:
* - '#items': The CSS items as returned by drupal_add_css() and altered by
* drupal_get_css().
* - '#group_callback': A function to call to group #items to enable the use
* of fewer tags by aggregating files and/or using multiple @import
* statements within a single tag.
* - '#aggregate_callback': A function to call to aggregate the items within
* the groups arranged by the #group_callback function.
*
* @return
* A render array that will render to a string of XHTML CSS tags.
*
* @see drupal_get_css()
*/
function drupal_pre_render_styles($elements) {
// Group and aggregate the items.
if (isset($elements['#group_callback'])) {
$elements['#groups'] = $elements['#group_callback']($elements['#items']);
}
if (isset($elements['#aggregate_callback'])) {
$elements['#aggregate_callback']($elements['#groups']);
}
// A dummy query-string is added to filenames, to gain control over
// browser-caching. The string changes on every update or full cache
// flush, forcing browsers to load a new copy of the files, as the
// URL changed.
$query_string = variable_get('css_js_query_string', '0');
// For inline CSS to validate as XHTML, all CSS containing XHTML needs to be
// wrapped in CDATA. To make that backwards compatible with HTML 4, we need to
// comment out the CDATA-tag.
$embed_prefix = "\n<!--/*--><![CDATA[/*><!--*/\n";
$embed_suffix = "\n/*]]>*/-->\n";
// Defaults for LINK and STYLE elements.
$link_element_defaults = array(
'#type' => 'html_tag',
'#tag' => 'link',
'#attributes' => array(
'type' => 'text/css',
'rel' => 'stylesheet',
),
);
$style_element_defaults = array(
'#type' => 'html_tag',
'#tag' => 'style',
'#attributes' => array(
'type' => 'text/css',
),
);
// Loop through each group.
foreach ($elements['#groups'] as $group) {
switch ($group['type']) {
// For file items, there are three possibilites.
// - The group has been aggregated: in this case, output a LINK tag for
// the aggregate file.
// - The group can be aggregated but has not been (most likely because
// the site administrator disabled the site-wide setting): in this case,
// output as few STYLE tags for the group as possible, using @import
// statement for each file in the group. This enables us to stay within
// IE's limit of 31 total CSS inclusion tags.
// - The group contains items not eligible for aggregation (their
// 'preprocess' flag has been set to FALSE): in this case, output a LINK
// tag for each file.
case 'file':
// The group has been aggregated into a single file: output a LINK tag
// for the aggregate file.
if (isset($group['data'])) {
$element = $link_element_defaults;
$element['#attributes']['href'] = file_create_url($group['data']);
$element['#attributes']['media'] = $group['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
// The group can be aggregated, but hasn't been: combine multiple items
// into as few STYLE tags as possible.
elseif ($group['preprocess']) {
$import = array();
foreach ($group['items'] as $item) {
// A theme's .info file may have an entry for a file that doesn't
// exist as a way of overriding a module or base theme CSS file from
// being added to the page. Normally, file_exists() calls that need
// to run for every page request should be minimized, but this one
// is okay, because it only runs when CSS aggregation is disabled.
// On a server under heavy enough load that file_exists() calls need
// to be minimized, CSS aggregation should be enabled, in which case
// this code is not run. When aggregation is enabled,
// drupal_load_stylesheet() checks file_exists(), but only when
// building the aggregate file, which is then reused for many page
// requests.
if (file_exists($item['data'])) {
// The dummy query string needs to be added to the URL to control
// browser-caching. IE7 does not support a media type on the
// @import statement, so we instead specify the media for the
// group on the STYLE tag.
$import[] = '@import url("' . check_plain(file_create_url($item['data']) . '?' . $query_string) . '");';
}
}
// In addition to IE's limit of 31 total CSS inclusion tags, it also
// has a limit of 31 @import statements per STYLE tag.
while (!empty($import)) {
$import_batch = array_slice($import, 0, 31); $import = array_slice($import, 31);
$element = $style_element_defaults;
$element['#value'] = implode("\n", $import_batch);
$element['#attributes']['media'] = $group['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
}
// The group contains items ineligible for aggregation: output a LINK
// tag for each file.
else {
foreach ($group['items'] as $item) {
$element = $link_element_defaults;
// We do not check file_exists() here, because this code runs for
// files whose 'preprocess' is set to FALSE, and therefore, even
// when aggregation is enabled, and we want to avoid needlessly
// taxing a server that may be under heavy load. The file_exists()
// performed above for files whose 'preprocess' is TRUE is done for
// the benefit of theme .info files, but code that deals with files
// whose 'preprocess' is FALSE is responsible for ensuring the file
// exists.
// The dummy query string needs to be added to the URL to control
// browser-caching.
$query_string_separator = (strpos($item['data'], '?') !== FALSE) ? '&' : '?';
$element['#attributes']['href'] = file_create_url($item['data']) . $query_string_separator . $query_string;
$element['#attributes']['media'] = $item['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
}
break;
// For inline content, the 'data' property contains the CSS content. If
// the group's 'data' property is set, then output it in a single STYLE
// tag. Otherwise, output a separate STYLE tag for each item.
case 'inline':
if (isset($group['data'])) {
$element = $style_element_defaults;
$element['#value'] = $group['data'];
$element['#value_prefix'] = $embed_prefix;
$element['#value_suffix'] = $embed_suffix;
$element['#attributes']['media'] = $group['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
else {
foreach ($group['items'] as $item) {
$element = $style_element_defaults;
$element['#value'] = $item['data'];
$element['#value_prefix'] = $embed_prefix;
$element['#value_suffix'] = $embed_suffix;
$element['#attributes']['media'] = $item['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
}
break;
// Output a LINK tag for each external item. The item's 'data' property
// contains the full URL.
case 'external':
foreach ($group['items'] as $item) {
$element = $link_element_defaults;
$element['#attributes']['href'] = $item['data'];
$element['#attributes']['media'] = $item['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
break;
}
}
return $elements;
}
/**
* Aggregates and optimizes CSS files into a cache file in the files directory.
*
* The file name for the CSS cache file is generated from the hash of the
* aggregated contents of the files in $css. This forces proxies and browsers
* to download new CSS when the CSS changes.
*
* The cache file name is retrieved on a page load via a lookup variable that
* contains an associative array. The array key is the hash of the file names
* in $css while the value is the cache file name. The cache file is generated
* in two cases. First, if there is no file name value for the key, which will
* happen if a new file name has been added to $css or after the lookup
* variable is emptied to force a rebuild of the cache. Second, the cache
* file is generated if it is missing on disk. Old cache files are not deleted
* immediately when the lookup variable is emptied, but are deleted after a set
* period by drupal_delete_file_if_stale(). This ensures that files referenced
* by a cached page will still be available.
*
* @param $css
* An array of CSS files to aggregate and compress into one file.
*
* @return
* The URI of the CSS cache file, or FALSE if the file could not be saved.
*/
function drupal_build_css_cache($css) {
$data = '';
$uri = '';
$map = variable_get('drupal_css_cache_files', array());
$key = hash('sha256', serialize($css));
if (isset($map[$key])) {
$uri = $map[$key];
}
if (empty($uri) || !file_exists($uri)) {
// Build aggregate CSS file.
foreach ($css as $stylesheet) {
// Only 'file' stylesheets can be aggregated.
if ($stylesheet['type'] == 'file') {
$contents = drupal_load_stylesheet($stylesheet['data'], TRUE);
// Build the base URL of this CSS file: start with the full URL.
$css_base_url = file_create_url($stylesheet['data']);
// Move to the parent.
$css_base_url = substr($css_base_url, 0, strrpos($css_base_url, '/'));
// Simplify to a relative URL if the stylesheet URL starts with the
// base URL of the website.
if (substr($css_base_url, 0, strlen($GLOBALS['base_root'])) == $GLOBALS['base_root']) {
$css_base_url = substr($css_base_url, strlen($GLOBALS['base_root']));
}
_drupal_build_css_path(NULL, $css_base_url . '/');
// Anchor all paths in the CSS with its base URL, ignoring external and absolute paths.
$data .= preg_replace_callback('/url\(\s*[\'"]?(?![a-z]+:|\/+)([^\'")]+)[\'"]?\s*\)/i', '_drupal_build_css_path', $contents);
}
}
// Per the W3C specification at http://www.w3.org/TR/REC-CSS2/cascade.html#at-import,
// @import rules must proceed any other style, so we move those to the top.
$regexp = '/@import[^;]+;/i';
preg_match_all($regexp, $data, $matches);
$data = preg_replace($regexp, '', $data);
$data = implode('', $matches[0]) . $data;
// Prefix filename to prevent blocking by firewalls which reject files
// starting with "ad*".
$filename = 'css_' . drupal_hash_base64($data) . '.css';
// Create the css/ within the files folder. $csspath = 'public://css';
$uri = $csspath . '/' . $filename;
// Create the CSS file.
file_prepare_directory($csspath, FILE_CREATE_DIRECTORY);
if (!file_exists($uri) && !file_unmanaged_save_data($data, $uri, FILE_EXISTS_REPLACE)) {
return FALSE;
}
// If CSS gzip compression is enabled, clean URLs are enabled (which means
// that rewrite rules are working) and the zlib extension is available then
// create a gzipped version of this file. This file is served conditionally
// to browsers that accept gzip using .htaccess rules.
if (variable_get('css_gzip_compression', TRUE) && variable_get('clean_url', 0) && extension_loaded('zlib')) {
if (!file_exists($uri . '.gz') && !file_unmanaged_save_data(gzencode($data, 9, FORCE_GZIP), $uri . '.gz', FILE_EXISTS_REPLACE)) {
return FALSE;
}
}
// Save the updated map.
$map[$key] = $uri;
variable_set('drupal_css_cache_files', $map);
}
return $uri;
}
/**
* Helper function for drupal_build_css_cache().
*
* This function will prefix all paths within a CSS file.
*/
function _drupal_build_css_path($matches, $base = NULL) {
$_base = &drupal_static(__FUNCTION__);
// Store base path for preg_replace_callback.
if (isset($base)) {
$_base = $base;
}
// Prefix with base and remove '../' segments where possible.
$path = $_base . $matches[1];
$last = '';
while ($path != $last) {
$last = $path;
$path = preg_replace('`(^|/)(?!\.\./)([^/]+)/\.\./`', '$1', $path);
}
return 'url(' . $path . ')';
}
/**
* Loads the stylesheet and resolves all @import commands.
*
* Loads a stylesheet and replaces @import commands with the contents of the
* imported file. Use this instead of file_get_contents when processing
* stylesheets.
*
* The returned contents are compressed removing white space and comments only
* when CSS aggregation is enabled. This optimization will not apply for
* color.module enabled themes with CSS aggregation turned off.
*
* @param $file
* Name of the stylesheet to be processed.
* @param $optimize
* Defines if CSS contents should be compressed or not.
* @param $reset_basepath
* Used internally to facilitate recursive resolution of @import commands.
*
* @return
* Contents of the stylesheet, including any resolved @import commands.
*/
function drupal_load_stylesheet($file, $optimize = NULL, $reset_basepath = TRUE) {
// These statics are not cache variables, so we don't use drupal_static().
static $_optimize, $basepath;
if ($reset_basepath) { $basepath = '';
}
// Store the value of $optimize for preg_replace_callback with nested
// @import loops.
if (isset($optimize)) {
$_optimize = $optimize;
}
// Stylesheets are relative one to each other. Start by adding a base path
// prefix provided by the parent stylesheet (if necessary).
if ($basepath && !file_uri_scheme($file)) {
$file = $basepath . '/' . $file;
}
$basepath = dirname($file);
// Load the CSS stylesheet. We suppress errors because themes may specify
// stylesheets in their .info file that don't exist in the theme's path,
// but are merely there to disable certain module CSS files.
if ($contents = @file_get_contents($file)) {
// Return the processed stylesheet.
return drupal_load_stylesheet_content($contents, $_optimize);
}
return '';
}
/**
* Process the contents of a stylesheet for aggregation.
*
* @param $contents
* The contents of the stylesheet.
* @param $optimize
* (optional) Boolean whether CSS contents should be minified. Defaults to
* FALSE.
* @return
* Contents of the stylesheet including the imported stylesheets.
*/
function drupal_load_stylesheet_content($contents, $optimize = FALSE) {
// Remove multiple charset declarations for standards compliance (and fixing Safari problems).
$contents = preg_replace('/^@charset\s+[\'"](\S*)\b[\'"];/i', '', $contents);
if ($optimize) {
// Perform some safe CSS optimizations.
// Regexp to match comment blocks.
$comment = '/\*[^*]*\*+(?:[^/*][^*]*\*+)*/';
// Regexp to match double quoted strings.
$double_quot = '"[^"\\\\]*(?:\\\\.[^"\\\\]*)*"';
// Regexp to match single quoted strings.
$single_quot = "'[^'\\\\]*(?:\\\\.[^'\\\\]*)*'";
// Strip all comment blocks, but keep double/single quoted strings.
$contents = preg_replace(
"<($double_quot|$single_quot)|$comment>Ss",
"$1",
$contents
);
// Remove certain whitespace.
// There are different conditions for removing leading and trailing
// whitespace.
// @see http://php.net/manual/en/regexp.reference.subpatterns.php
$contents = preg_replace('<
# Strip leading and trailing whitespace.
\s*([@{};,])\s*
# Strip only leading whitespace from:
# - Closing parenthesis: Retain "@media (bar) and foo".
| \s+([\)])
# Strip only trailing whitespace from:
# - Opening parenthesis: Retain "@media (bar) and foo".
# - Colon: Retain :pseudo-selectors.
| ([\(:])\s+
>xS', // Only one of the three capturing groups will match, so its reference
// will contain the wanted value and the references for the
// two non-matching groups will be replaced with empty strings.
'$1$2$3',
$contents
);
// End the file with a new line.
$contents = trim($contents);
$contents .= "\n";
}
// Replaces @import commands with the actual stylesheet content.
// This happens recursively but omits external files.
$contents = preg_replace_callback('/@import\s*(?:url\(\s*)?[\'"]?(?![a-z]+:)([^\'"\()]+)[\'"]?\s*\)?\s*;/', '_drupal_load_stylesheet', $contents);
return $contents;
}
/**
* Loads stylesheets recursively and returns contents with corrected paths.
*
* This function is used for recursive loading of stylesheets and
* returns the stylesheet content with all url() paths corrected.
*/
function _drupal_load_stylesheet($matches) {
$filename = $matches[1];
// Load the imported stylesheet and replace @import commands in there as well.
$file = drupal_load_stylesheet($filename, NULL, FALSE);
// Determine the file's directory.
$directory = dirname($filename);
// If the file is in the current directory, make sure '.' doesn't appear in
// the url() path.
$directory = $directory == '.' ? '' : $directory .'/';
// Alter all internal url() paths. Leave external paths alone. We don't need
// to normalize absolute paths here (i.e. remove folder/... segments) because
// that will be done later.
return preg_replace('/url\(\s*([\'"]?)(?![a-z]+:|\/+)/i', 'url(\1'. $directory, $file);
}
/**
* Deletes old cached CSS files.
*/
function drupal_clear_css_cache() {
variable_del('drupal_css_cache_files');
file_scan_directory('public://css', '/.*/', array('callback' => 'drupal_delete_file_if_stale'));
}
/**
* Callback to delete files modified more than a set time ago.
*/
function drupal_delete_file_if_stale($uri) {
// Default stale file threshold is 30 days.
if (REQUEST_TIME - filemtime($uri) > variable_get('drupal_stale_file_threshold', 2592000)) {
file_unmanaged_delete($uri);
}
}
/**
* Prepare a string for use as a valid CSS identifier (element, class or ID name).
*
* http://www.w3.org/TR/CSS21/syndata.html#characters shows the syntax for valid
* CSS identifiers (including element names, classes, and IDs in selectors.)
*
* @param $identifier
* The identifier to clean.
* @param $filter
* An array of string replacements to use on the identifier.
* @return
* The cleaned identifier. */
function drupal_clean_css_identifier($identifier, $filter = array(' ' => '-', '_' => '-', '/' => '-', '[' => '-', ']' => '')) {
// By default, we filter using Drupal's coding standards.
$identifier = strtr($identifier, $filter);
// Valid characters in a CSS identifier are:
// - the hyphen (U+002D)
// - a-z (U+0030 - U+0039)
// - A-Z (U+0041 - U+005A)
// - the underscore (U+005F)
// - 0-9 (U+0061 - U+007A)
// - ISO 10646 characters U+00A1 and higher
// We strip out any character not in the above list.
$identifier = preg_replace('/[^\x{002D}\x{0030}-\x{0039}\x{0041}-\x{005A}\x{005F}\x{0061}-\x{007A}\x{00A1}-\x{FFFF}]/u', '', $identifier);
return $identifier;
}
/**
* Prepare a string for use as a valid class name.
*
* Do not pass one string containing multiple classes as they will be
* incorrectly concatenated with dashes, i.e. "one two" will become "one-two".
*
* @param $class
* The class name to clean.
* @return
* The cleaned class name.
*/
function drupal_html_class($class) {
return drupal_clean_css_identifier(drupal_strtolower($class));
}
/**
* Prepare a string for use as a valid HTML ID and guarantee uniqueness.
*
* This function ensures that each passed HTML ID value only exists once on the
* page. By tracking the already returned ids, this function enables forms,
* blocks, and other content to be output multiple times on the same page,
* without breaking (X)HTML validation.
*
* For already existing IDs, a counter is appended to the ID string. Therefore,
* JavaScript and CSS code should not rely on any value that was generated by
* this function and instead should rely on manually added CSS classes or
* similarly reliable constructs.
*
* Two consecutive hyphens separate the counter from the original ID. To manage
* uniqueness across multiple Ajax requests on the same page, Ajax requests
* POST an array of all IDs currently present on the page, which are used to
* prime this function's cache upon first invocation.
*
* To allow reverse-parsing of IDs submitted via Ajax, any multiple consecutive
* hyphens in the originally passed $id are replaced with a single hyphen.
*
* @param $id
* The ID to clean.
*
* @return
* The cleaned ID.
*/
function drupal_html_id($id) {
// If this is an Ajax request, then content returned by this page request will
// be merged with content already on the base page. The HTML IDs must be
// unique for the fully merged content. Therefore, initialize $seen_ids to
// take into account IDs that are already in use on the base page.
$seen_ids_init = &drupal_static(__FUNCTION__ . ':init');
if (!isset($seen_ids_init)) {
// Ideally, Drupal would provide an API to persist state information about
// prior page requests in the database, and we'd be able to add this
// function's $seen_ids static variable to that state information in order // to have it properly initialized for this page request. However, no such
// page state API exists, so instead, ajax.js adds all of the in-use HTML
// IDs to the POST data of Ajax submissions. Direct use of $_POST is
// normally not recommended as it could open up security risks, but because
// the raw POST data is cast to a number before being returned by this
// function, this usage is safe.
if (empty($_POST['ajax_html_ids'])) {
$seen_ids_init = array();
}
else {
// This function ensures uniqueness by appending a counter to the base id
// requested by the calling function after the first occurrence of that
// requested id. $_POST['ajax_html_ids'] contains the ids as they were
// returned by this function, potentially with the appended counter, so
// we parse that to reconstruct the $seen_ids array.
foreach ($_POST['ajax_html_ids'] as $seen_id) {
// We rely on '--' being used solely for separating a base id from the
// counter, which this function ensures when returning an id.
$parts = explode('--', $seen_id, 2);
if (!empty($parts[1]) && is_numeric($parts[1])) {
list($seen_id, $i) = $parts;
}
else {
$i = 1;
}
if (!isset($seen_ids_init[$seen_id]) || ($i > $seen_ids_init[$seen_id])) {
$seen_ids_init[$seen_id] = $i;
}
}
}
}
$seen_ids = &drupal_static(__FUNCTION__, $seen_ids_init);
$id = strtr(drupal_strtolower($id), array(' ' => '-', '_' => '-', '[' => '-', ']' => ''));
// As defined in http://www.w3.org/TR/html4/types.html#type-name, HTML IDs can
// only contain letters, digits ([0-9]), hyphens ("-"), underscores ("_"),
// colons (":"), and periods ("."). We strip out any character not in that
// list. Note that the CSS spec doesn't allow colons or periods in identifiers
// (http://www.w3.org/TR/CSS21/syndata.html#characters), so we strip those two
// characters as well.
$id = preg_replace('/[^A-Za-z0-9\-_]/', '', $id);
// Removing multiple consecutive hyphens.
$id = preg_replace('/\-+/', '-', $id);
// Ensure IDs are unique by appending a counter after the first occurrence.
// The counter needs to be appended with a delimiter that does not exist in
// the base ID. Requiring a unique delimiter helps ensure that we really do
// return unique IDs and also helps us re-create the $seen_ids array during
// Ajax requests.
if (isset($seen_ids[$id])) {
$id = $id . '--' . ++$seen_ids[$id];
}
else {
$seen_ids[$id] = 1;
}
return $id;
}
/**
* Provides a standard HTML class name that identifies a page region.
*
* It is recommended that template preprocess functions apply this class to any
* page region that is output by the theme (Drupal core already handles this in
* the standard template preprocess implementation). Standardizing the class
* names in this way allows modules to implement certain features, such as
* drag-and-drop or dynamic Ajax loading, in a theme-independent way.
*
* @param $region * The name of the page region (for example, 'page_top' or 'content').
*
* @return
* An HTML class that identifies the region (for example, 'region-page-top'
* or 'region-content').
*
* @see template_preprocess_region()
*/
function drupal_region_class($region) {
return drupal_html_class("region-$region");
}
/**
* Adds a JavaScript file, setting, or inline code to the page.
*
* The behavior of this function depends on the parameters it is called with.
* Generally, it handles the addition of JavaScript to the page, either as
* reference to an existing file or as inline code. The following actions can be
* performed using this function:
* - Add a file ('file'): Adds a reference to a JavaScript file to the page.
* - Add inline JavaScript code ('inline'): Executes a piece of JavaScript code
* on the current page by placing the code directly in the page (for example,
* to tell the user that a new message arrived, by opening a pop up, alert
* box, etc.). This should only be used for JavaScript that cannot be executed
* from a file. When adding inline code, make sure that you are not relying on
* $() being the jQuery function. Wrap your code in
* @code (function ($) {... })(jQuery); @endcode
* or use jQuery() instead of $().
* - Add external JavaScript ('external'): Allows the inclusion of external
* JavaScript files that are not hosted on the local server. Note that these
* external JavaScript references do not get aggregated when preprocessing is
* on.
* - Add settings ('setting'): Adds settings to Drupal's global storage of
* JavaScript settings. Per-page settings are required by some modules to
* function properly. All settings will be accessible at Drupal.settings.
*
* Examples:
* @code
* drupal_add_js('misc/collapse.js');
* drupal_add_js('misc/collapse.js', 'file');
* drupal_add_js('jQuery(document).ready(function () { alert("Hello!"); });', 'inline');
* drupal_add_js('jQuery(document).ready(function () { alert("Hello!"); });',
* array('type' => 'inline', 'scope' => 'footer', 'weight' => 5)
* );
* drupal_add_js('http://example.com/example.js', 'external');
* drupal_add_js(array('myModule' => array('key' => 'value')), 'setting');
* @endcode
*
* Calling drupal_static_reset('drupal_add_js') will clear all JavaScript added
* so far.
*
* If JavaScript aggregation is enabled, all JavaScript files added with
* $options['preprocess'] set to TRUE will be merged into one aggregate file.
* Preprocessed inline JavaScript will not be aggregated into this single file.
* Externally hosted JavaScripts are never aggregated.
*
* The reason for aggregating the files is outlined quite thoroughly here:
* http://www.die.net/musings/page_load_time/ "Load fewer external objects. Due
* to request overhead, one bigger file just loads faster than two smaller ones
* half its size."
*
* $options['preprocess'] should be only set to TRUE when a file is required for
* all typical visitors and most pages of a site. It is critical that all
* preprocessed files are added unconditionally on every page, even if the
* files are not needed on a page. This is normally done by calling
* drupal_add_js() in a hook_init() implementation.
*
* Non-preprocessed files should only be added to the page when they are
* actually needed.
* * @param $data
* (optional) If given, the value depends on the $options parameter:
* - 'file': Path to the file relative to base_path().
* - 'inline': The JavaScript code that should be placed in the given scope.
* - 'external': The absolute path to an external JavaScript file that is not
* hosted on the local server. These files will not be aggregated if
* JavaScript aggregation is enabled.
* - 'setting': An associative array with configuration options. The array is
* merged directly into Drupal.settings. All modules should wrap their
* actual configuration settings in another variable to prevent conflicts in
* the Drupal.settings namespace. Items added with a string key will replace
* existing settings with that key; items with numeric array keys will be
* added to the existing settings array.
* @param $options
* (optional) A string defining the type of JavaScript that is being added in
* the $data parameter ('file'/'setting'/'inline'/'external'), or an
* associative array. JavaScript settings should always pass the string
* 'setting' only. Other types can have the following elements in the array:
* - type: The type of JavaScript that is to be added to the page. Allowed
* values are 'file', 'inline', 'external' or 'setting'. Defaults
* to 'file'.
* - scope: The location in which you want to place the script. Possible
* values are 'header' or 'footer'. If your theme implements different
* regions, you can also use these. Defaults to 'header'.
* - group: A number identifying the group in which to add the JavaScript.
* Available constants are:
* - JS_LIBRARY: Any libraries, settings, or jQuery plugins.
* - JS_DEFAULT: Any module-layer JavaScript.
* - JS_THEME: Any theme-layer JavaScript.
* The group number serves as a weight: JavaScript within a lower weight
* group is presented on the page before JavaScript within a higher weight
* group.
* - every_page: For optimal front-end performance when aggregation is
* enabled, this should be set to TRUE if the JavaScript is present on every
* page of the website for users for whom it is present at all. This
* defaults to FALSE. It is set to TRUE for JavaScript files that are added
* via module and theme .info files. Modules that add JavaScript within
* hook_init() implementations, or from other code that ensures that the
* JavaScript is added to all website pages, should also set this flag to
* TRUE. All JavaScript files within the same group and that have the
* 'every_page' flag set to TRUE and do not have 'preprocess' set to FALSE
* are aggregated together into a single aggregate file, and that aggregate
* file can be reused across a user's entire site visit, leading to faster
* navigation between pages. However, JavaScript that is only needed on
* pages less frequently visited, can be added by code that only runs for
* those particular pages, and that code should not set the 'every_page'
* flag. This minimizes the size of the aggregate file that the user needs
* to download when first visiting the website. JavaScript without the
* 'every_page' flag is aggregated into a separate aggregate file. This
* other aggregate file is likely to change from page to page, and each new
* aggregate file needs to be downloaded when first encountered, so it
* should be kept relatively small by ensuring that most commonly needed
* JavaScript is added to every page.
* - weight: A number defining the order in which the JavaScript is added to
* the page relative to other JavaScript with the same 'scope', 'group',
* and 'every_page' value. In some cases, the order in which the JavaScript
* is presented on the page is very important. jQuery, for example, must be
* added to the page before any jQuery code is run, so jquery.js uses the
* JS_LIBRARY group and a weight of -20, jquery.once.js (a library drupal.js
* depends on) uses the JS_LIBRARY group and a weight of -19, drupal.js uses
* the JS_LIBRARY group and a weight of -1, other libraries use the
* JS_LIBRARY group and a weight of 0 or higher, and all other scripts use
* one of the other group constants. The exact ordering of JavaScript is as
* follows:
* - First by scope, with 'header' first, 'footer' last, and any other
* scopes provided by a custom theme coming in between, as determined by
* the theme.
* - Then by group.
* - Then by the 'every_page' flag, with TRUE coming before FALSE.
* - Then by weight. * - Then by the order in which the JavaScript was added. For example, all
* else being the same, JavaScript added by a call to drupal_add_js() that
* happened later in the page request gets added to the page after one for
* which drupal_add_js() happened earlier in the page request.
* - defer: If set to TRUE, the defer attribute is set on the <script>
* tag. Defaults to FALSE.
* - cache: If set to FALSE, the JavaScript file is loaded anew on every page
* call; in other words, it is not cached. Used only when 'type' references
* a JavaScript file. Defaults to TRUE.
* - preprocess: If TRUE and JavaScript aggregation is enabled, the script
* file will be aggregated. Defaults to TRUE.
*
* @return
* The current array of JavaScript files, settings, and in-line code,
* including Drupal defaults, anything previously added with calls to
* drupal_add_js(), and this function call's additions.
*
* @see drupal_get_js()
*/
function drupal_add_js($data = NULL, $options = NULL) {
$javascript = &drupal_static(__FUNCTION__, array());
// Construct the options, taking the defaults into consideration.
if (isset($options)) {
if (!is_array($options)) {
$options = array('type' => $options);
}
}
else {
$options = array();
}
$options += drupal_js_defaults($data);
// Preprocess can only be set if caching is enabled.
$options['preprocess'] = $options['cache'] ? $options['preprocess'] : FALSE;
// Tweak the weight so that files of the same weight are included in the
// order of the calls to drupal_add_js().
$options['weight'] += count($javascript) / 1000;
if (isset($data)) {
// Add jquery.js and drupal.js, as well as the basePath setting, the
// first time a JavaScript file is added.
if (empty($javascript)) {
// url() generates the prefix using hook_url_outbound_alter(). Instead of
// running the hook_url_outbound_alter() again here, extract the prefix
// from url().
url('', array('prefix' => &$prefix));
$javascript = array(
'settings' => array(
'data' => array(
array('basePath' => base_path()),
array('pathPrefix' => empty($prefix) ? '' : $prefix),
),
'type' => 'setting',
'scope' => 'header',
'group' => JS_LIBRARY,
'every_page' => TRUE,
'weight' => 0,
),
'misc/drupal.js' => array(
'data' => 'misc/drupal.js',
'type' => 'file',
'scope' => 'header',
'group' => JS_LIBRARY,
'every_page' => TRUE,
'weight' => -1,
'preprocess' => TRUE,
'cache' => TRUE,
'defer' => FALSE, ),
);
// Register all required libraries.
drupal_add_library('system', 'jquery', TRUE);
drupal_add_library('system', 'jquery.once', TRUE);
}
switch ($options['type']) {
case 'setting':
// All JavaScript settings are placed in the header of the page with
// the library weight so that inline scripts appear afterwards.
$javascript['settings']['data'][] = $data;
break;
case 'inline':
$javascript[] = $options;
break;
default: // 'file' and 'external'
// Local and external files must keep their name as the associative key
// so the same JavaScript file is not added twice.
$javascript[$options['data']] = $options;
}
}
return $javascript;
}
/**
* Constructs an array of the defaults that are used for JavaScript items.
*
* @param $data
* (optional) The default data parameter for the JavaScript item array.
* @see drupal_get_js()
* @see drupal_add_js()
*/
function drupal_js_defaults($data = NULL) {
return array(
'type' => 'file',
'group' => JS_DEFAULT,
'every_page' => FALSE,
'weight' => 0,
'scope' => 'header',
'cache' => TRUE,
'defer' => FALSE,
'preprocess' => TRUE,
'version' => NULL,
'data' => $data,
);
}
/**
* Returns a themed presentation of all JavaScript code for the current page.
*
* References to JavaScript files are placed in a certain order: first, all
* 'core' files, then all 'module' and finally all 'theme' JavaScript files
* are added to the page. Then, all settings are output, followed by 'inline'
* JavaScript code. If running update.php, all preprocessing is disabled.
*
* Note that hook_js_alter(&$javascript) is called during this function call
* to allow alterations of the JavaScript during its presentation. Calls to
* drupal_add_js() from hook_js_alter() will not be added to the output
* presentation. The correct way to add JavaScript during hook_js_alter()
* is to add another element to the $javascript array, deriving from
* drupal_js_defaults(). See locale_js_alter() for an example of this.
*
* @param $scope
* (optional) The scope for which the JavaScript rules should be returned.
* Defaults to 'header'.
* @param $javascript
* (optional) An array with all JavaScript code. Defaults to the default * JavaScript array for the given scope.
* @param $skip_alter
* (optional) If set to TRUE, this function skips calling drupal_alter() on
* $javascript, useful when the calling function passes a $javascript array
* that has already been altered.
* @return
* All JavaScript code segments and includes for the scope as HTML tags.
* @see drupal_add_js()
* @see locale_js_alter()
* @see drupal_js_defaults()
*/
function drupal_get_js($scope = 'header', $javascript = NULL, $skip_alter = FALSE) {
if (!isset($javascript)) {
$javascript = drupal_add_js();
}
if (empty($javascript)) {
return '';
}
// Allow modules to alter the JavaScript.
if (!$skip_alter) {
drupal_alter('js', $javascript);
}
// Filter out elements of the given scope.
$items = array();
foreach ($javascript as $key => $item) {
if ($item['scope'] == $scope) {
$items[$key] = $item;
}
}
$output = '';
// The index counter is used to keep aggregated and non-aggregated files in
// order by weight.
$index = 1;
$processed = array();
$files = array();
$preprocess_js = (variable_get('preprocess_js', FALSE) && (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update'));
// A dummy query-string is added to filenames, to gain control over
// browser-caching. The string changes on every update or full cache
// flush, forcing browsers to load a new copy of the files, as the
// URL changed. Files that should not be cached (see drupal_add_js())
// get REQUEST_TIME as query-string instead, to enforce reload on every
// page request.
$default_query_string = variable_get('css_js_query_string', '0');
// For inline JavaScript to validate as XHTML, all JavaScript containing
// XHTML needs to be wrapped in CDATA. To make that backwards compatible
// with HTML 4, we need to comment out the CDATA-tag.
$embed_prefix = "\n<!--//--><![CDATA[//><!--\n";
$embed_suffix = "\n//--><!]]>\n";
// Since JavaScript may look for arguments in the URL and act on them, some
// third-party code might require the use of a different query string.
$js_version_string = variable_get('drupal_js_version_query_string', 'v=');
// Sort the JavaScript so that it appears in the correct order.
uasort($items, 'drupal_sort_css_js');
// Provide the page with information about the individual JavaScript files
// used, information not otherwise available when aggregation is enabled.
$setting['ajaxPageState']['js'] = array_fill_keys(array_keys($items), 1);
unset($setting['ajaxPageState']['js']['settings']);
drupal_add_js($setting, 'setting');
// If we're outputting the header scope, then this might be the final time
// that drupal_get_js() is running, so add the setting to this output as well
// as to the drupal_add_js() cache. If $items['settings'] doesn't exist, it's // because drupal_get_js() was intentionally passed a $javascript argument
// stripped off settings, potentially in order to override how settings get
// output, so in this case, do not add the setting to this output.
if ($scope == 'header' && isset($items['settings'])) {
$items['settings']['data'][] = $setting;
}
// Loop through the JavaScript to construct the rendered output.
$element = array(
'#tag' => 'script',
'#value' => '',
'#attributes' => array(
'type' => 'text/javascript',
),
);
foreach ($items as $item) {
$query_string = empty($item['version']) ? $default_query_string : $js_version_string . $item['version'];
switch ($item['type']) {
case 'setting':
$js_element = $element;
$js_element['#value_prefix'] = $embed_prefix;
$js_element['#value'] = 'jQuery.extend(Drupal.settings, ' . drupal_json_encode(drupal_array_merge_deep_array($item['data'])) . ");";
$js_element['#value_suffix'] = $embed_suffix;
$output .= theme('html_tag', array('element' => $js_element));
break;
case 'inline':
$js_element = $element;
if ($item['defer']) {
$js_element['#attributes']['defer'] = 'defer';
}
$js_element['#value_prefix'] = $embed_prefix;
$js_element['#value'] = $item['data'];
$js_element['#value_suffix'] = $embed_suffix;
$processed[$index++] = theme('html_tag', array('element' => $js_element));
break;
case 'file':
$js_element = $element;
if (!$item['preprocess'] || !$preprocess_js) {
if ($item['defer']) {
$js_element['#attributes']['defer'] = 'defer';
}
$query_string_separator = (strpos($item['data'], '?') !== FALSE) ? '&' : '?';
$js_element['#attributes']['src'] = file_create_url($item['data']) . $query_string_separator . ($item['cache'] ? $query_string : REQUEST_TIME);
$processed[$index++] = theme('html_tag', array('element' => $js_element));
}
else {
// By increasing the index for each aggregated file, we maintain
// the relative ordering of JS by weight. We also set the key such
// that groups are split by items sharing the same 'group' value and
// 'every_page' flag. While this potentially results in more aggregate
// files, it helps make each one more reusable across a site visit,
// leading to better front-end performance of a website as a whole.
// See drupal_add_js() for details.
$key = 'aggregate_' . $item['group'] . '_' . $item['every_page'] . '_' . $index;
$processed[$key] = '';
$files[$key][$item['data']] = $item;
}
break;
case 'external':
$js_element = $element;
// Preprocessing for external JavaScript files is ignored.
if ($item['defer']) {
$js_element['#attributes']['defer'] = 'defer';
}
$js_element['#attributes']['src'] = $item['data'];
$processed[$index++] = theme('html_tag', array('element' => $js_element)); break;
}
}
// Aggregate any remaining JS files that haven't already been output.
if ($preprocess_js && count($files) > 0) {
foreach ($files as $key => $file_set) {
$uri = drupal_build_js_cache($file_set);
// Only include the file if was written successfully. Errors are logged
// using watchdog.
if ($uri) {
$preprocess_file = file_create_url($uri);
$js_element = $element;
$js_element['#attributes']['src'] = $preprocess_file;
$processed[$key] = theme('html_tag', array('element' => $js_element));
}
}
}
// Keep the order of JS files consistent as some are preprocessed and others are not.
// Make sure any inline or JS setting variables appear last after libraries have loaded.
return implode('', $processed) . $output;
}
/**
* Adds attachments to a render() structure.
*
* Libraries, JavaScript, CSS and other types of custom structures are attached
* to elements using the #attached property. The #attached property is an
* associative array, where the keys are the the attachment types and the values
* are the attached data. For example:
* @code
* $build['#attached'] = array(
* 'js' => array(drupal_get_path('module', 'taxonomy') . '/taxonomy.js'),
* 'css' => array(drupal_get_path('module', 'taxonomy') . '/taxonomy.css'),
* );
* @endcode
*
* 'js', 'css', and 'library' are types that get special handling. For any
* other kind of attached data, the array key must be the full name of the
* callback function and each value an array of arguments. For example:
* @code
* $build['#attached']['drupal_add_http_header'] = array(
* array('Content-Type', 'application/rss+xml; charset=utf-8'),
* );
* @endcode
*
* External 'js' and 'css' files can also be loaded. For example:
* @code
* $build['#attached']['js'] = array(
* 'http://code.jquery.com/jquery-1.4.2.min.js' => array(
* 'type' => 'external',
* ),
* );
* @endcode
*
* @param $elements
* The structured array describing the data being rendered.
* @param $group
* The default group of JavaScript and CSS being added. This is only applied
* to the stylesheets and JavaScript items that don't have an explicit group
* assigned to them.
* @param $dependency_check
* When TRUE, will exit if a given library's dependencies are missing. When
* set to FALSE, will continue to add the libraries, even though one or more
* dependencies are missing. Defaults to FALSE.
* @param $every_page
* Set to TRUE to indicate that the attachments are added to every page on the
* site. Only attachments with the every_page flag set to TRUE can participate
* in JavaScript/CSS aggregation. *
* @return
* FALSE if there were any missing library dependencies; TRUE if all library
* dependencies were met.
*
* @see drupal_add_library()
* @see drupal_add_js()
* @see drupal_add_css()
* @see drupal_render()
*/
function drupal_process_attached($elements, $group = JS_DEFAULT, $dependency_check = FALSE, $every_page = NULL) {
// Add defaults to the special attached structures that should be processed differently.
$elements['#attached'] += array(
'library' => array(),
'js' => array(),
'css' => array(),
);
// Add the libraries first.
$success = TRUE;
foreach ($elements['#attached']['library'] as $library) {
if (drupal_add_library($library[0], $library[1], $every_page) === FALSE) {
$success = FALSE;
// Exit if the dependency is missing.
if ($dependency_check) {
return $success;
}
}
}
unset($elements['#attached']['library']);
// Add both the JavaScript and the CSS.
// The parameters for drupal_add_js() and drupal_add_css() require special
// handling.
foreach (array('js', 'css') as $type) {
foreach ($elements['#attached'][$type] as $data => $options) {
// If the value is not an array, it's a filename and passed as first
// (and only) argument.
if (!is_array($options)) {
$data = $options;
$options = NULL;
}
// In some cases, the first parameter ($data) is an array. Arrays can't be
// passed as keys in PHP, so we have to get $data from the value array.
if (is_numeric($data)) {
$data = $options['data'];
unset($options['data']);
}
// Apply the default group if it isn't explicitly given.
if (!isset($options['group'])) {
$options['group'] = $group;
}
// Set the every_page flag if one was passed.
if (isset($every_page)) {
$options['every_page'] = $every_page;
}
call_user_func('drupal_add_' . $type, $data, $options);
}
unset($elements['#attached'][$type]);
}
// Add additional types of attachments specified in the render() structure.
// Libraries, JavaScript and CSS have been added already, as they require
// special handling.
foreach ($elements['#attached'] as $callback => $options) {
if (function_exists($callback)) {
foreach ($elements['#attached'][$callback] as $args) {
call_user_func_array($callback, $args);
}
} }
return $success;
}
/**
* Adds JavaScript to change the state of an element based on another element.
*
* A "state" means a certain property on a DOM element, such as "visible" or
* "checked". A state can be applied to an element, depending on the state of
* another element on the page. In general, states depend on HTML attributes and
* DOM element properties, which change due to user interaction.
*
* Since states are driven by JavaScript only, it is important to understand
* that all states are applied on presentation only, none of the states force
* any server-side logic, and that they will not be applied for site visitors
* without JavaScript support. All modules implementing states have to make
* sure that the intended logic also works without JavaScript being enabled.
*
* #states is an associative array in the form of:
* @code
* array(
* STATE1 => CONDITIONS_ARRAY1,
* STATE2 => CONDITIONS_ARRAY2,
* ...
* )
* @endcode
* Each key is the name of a state to apply to the element, such as 'visible'.
* Each value is a list of conditions that denote when the state should be
* applied.
*
* Multiple different states may be specified to act on complex conditions:
* @code
* array(
* 'visible' => CONDITIONS,
* 'checked' => OTHER_CONDITIONS,
* )
* @endcode
*
* Every condition is a key/value pair, whose key is a jQuery selector that
* denotes another element on the page, and whose value is an array of
* conditions, which must bet met on that element:
* @code
* array(
* 'visible' => array(
* JQUERY_SELECTOR => REMOTE_CONDITIONS,
* JQUERY_SELECTOR => REMOTE_CONDITIONS,
* ...
* ),
* )
* @endcode
* All conditions must be met for the state to be applied.
*
* Each remote condition is a key/value pair specifying conditions on the other
* element that need to be met to apply the state to the element:
* @code
* array(
* 'visible' => array(
* ':input[name="remote_checkbox"]' => array('checked' => TRUE),
* ),
* )
* @endcode
*
* For example, to show a textfield only when a checkbox is checked:
* @code
* $form['toggle_me'] = array(
* '#type' => 'checkbox',
* '#title' => t('Tick this box to type'),
* );
* $form['settings'] = array( * '#type' => 'textfield',
* '#states' => array(
* // Only show this field when the 'toggle_me' checkbox is enabled.
* 'visible' => array(
* ':input[name="toggle_me"]' => array('checked' => TRUE),
* ),
* ),
* );
* @endcode
*
* The following states may be applied to an element:
* - enabled
* - disabled
* - visible
* - invisible
* - checked
* - unchecked
* - expanded
* - collapsed
*
* The following states may be used in remote conditions:
* - enabled
* - disabled
* - visible
* - invisible
* - checked
* - unchecked
* - value
*
* The following states exist for both states and remote conditions, but are not
* fully implemented and may not change anything on the element:
* - required
* - optional
* - relevant
* - irrelevant
* - valid
* - invalid
* - touched
* - untouched
* - filled
* - empty
* - readwrite
* - readonly
*
* When referencing select lists and radio buttons in remote conditions, a
* 'value' condition must be used:
* @code
* '#states' => array(
* // Show the settings if 'bar' has been selected for 'foo'.
* 'visible' => array(
* ':input[name="foo"]' => array('value' => 'bar'),
* ),
* ),
* @endcode
*
* @param $elements
* A renderable array element having a #states property as described above.
*
* @see form_example_states_form()
*/
function drupal_process_states(&$elements) {
$elements['#attached']['library'][] = array('system', 'drupal.states');
$elements['#attached']['js'][] = array(
'type' => 'setting',
'data' => array('states' => array('#' . $elements['#id'] => $elements['#states'])),
);
}
/**
* Adds multiple JavaScript or CSS files at the same time. *
* A library defines a set of JavaScript and/or CSS files, optionally using
* settings, and optionally requiring another library. For example, a library
* can be a jQuery plugin, a JavaScript framework, or a CSS framework. This
* function allows modules to load a library defined/shipped by itself or a
* depending module, without having to add all files of the library separately.
* Each library is only loaded once.
*
* @param $module
* The name of the module that registered the library.
* @param $name
* The name of the library to add.
* @param $every_page
* Set to TRUE if this library is added to every page on the site. Only items
* with the every_page flag set to TRUE can participate in aggregation.
*
* @return
* TRUE if the library was successfully added; FALSE if the library or one of
* its dependencies could not be added.
*
* @see drupal_get_library()
* @see hook_library()
* @see hook_library_alter()
*/
function drupal_add_library($module, $name, $every_page = NULL) {
$added = &drupal_static(__FUNCTION__, array());
// Only process the library if it exists and it was not added already.
if (!isset($added[$module][$name])) {
if ($library = drupal_get_library($module, $name)) {
// Add all components within the library.
$elements['#attached'] = array(
'library' => $library['dependencies'],
'js' => $library['js'],
'css' => $library['css'],
);
$added[$module][$name] = drupal_process_attached($elements, JS_LIBRARY, TRUE, $every_page);
}
else {
// Requested library does not exist.
$added[$module][$name] = FALSE;
}
}
return $added[$module][$name];
}
/**
* Retrieves information for a JavaScript/CSS library.
*
* Library information is statically cached. Libraries are keyed by module for
* several reasons:
* - Libraries are not unique. Multiple modules might ship with the same library
* in a different version or variant. This registry cannot (and does not
* attempt to) prevent library conflicts.
* - Modules implementing and thereby depending on a library that is registered
* by another module can only rely on that module's library.
* - Two (or more) modules can still register the same library and use it
* without conflicts in case the libraries are loaded on certain pages only.
*
* @param $module
* The name of a module that registered a library.
* @param $name
* (optional) The name of a registered library to retrieve. By default, all
* libraries registered by $module are returned.
*
* @return
* The definition of the requested library, if $name was passed and it exists,
* or FALSE if it does not exist. If no $name was passed, an associative array
* of libraries registered by $module is returned (which may be empty). *
* @see drupal_add_library()
* @see hook_library()
* @see hook_library_alter()
*
* @todo The purpose of drupal_get_*() is completely different to other page
* requisite API functions; find and use a different name.
*/
function drupal_get_library($module, $name = NULL) {
$libraries = &drupal_static(__FUNCTION__, array());
if (!isset($libraries[$module])) {
// Retrieve all libraries associated with the module.
$module_libraries = module_invoke($module, 'library');
if (empty($module_libraries)) {
$module_libraries = array();
}
// Allow modules to alter the module's registered libraries.
drupal_alter('library', $module_libraries, $module);
foreach ($module_libraries as $key => $data) {
if (is_array($data)) {
// Add default elements to allow for easier processing.
$module_libraries[$key] += array('dependencies' => array(), 'js' => array(), 'css' => array());
foreach ($module_libraries[$key]['js'] as $file => $options) {
$module_libraries[$key]['js'][$file]['version'] = $module_libraries[$key]['version'];
}
}
}
$libraries[$module] = $module_libraries;
}
if (isset($name)) {
if (!isset($libraries[$module][$name])) {
$libraries[$module][$name] = FALSE;
}
return $libraries[$module][$name];
}
return $libraries[$module];
}
/**
* Assist in adding the tableDrag JavaScript behavior to a themed table.
*
* Draggable tables should be used wherever an outline or list of sortable items
* needs to be arranged by an end-user. Draggable tables are very flexible and
* can manipulate the value of form elements placed within individual columns.
*
* To set up a table to use drag and drop in place of weight select-lists or
* in place of a form that contains parent relationships, the form must be
* themed into a table. The table must have an id attribute set. If using
* theme_table(), the id may be set as such:
* @code
* $output = theme('table', array('header' => $header, 'rows' => $rows, 'attributes' => array('id' => 'my-module-table')));
* return $output;
* @endcode
*
* In the theme function for the form, a special class must be added to each
* form element within the same column, "grouping" them together.
*
* In a situation where a single weight column is being sorted in the table, the
* classes could be added like this (in the theme function):
* @code
* $form['my_elements'][$delta]['weight']['#attributes']['class'] = array('my-elements-weight');
* @endcode
*
* Each row of the table must also have a class of "draggable" in order to enable the
* drag handles:
* @code
* $row = array(...);
* $rows[] = array( * 'data' => $row,
* 'class' => array('draggable'),
* );
* @endcode
*
* When tree relationships are present, the two additional classes
* 'tabledrag-leaf' and 'tabledrag-root' can be used to refine the behavior:
* - Rows with the 'tabledrag-leaf' class cannot have child rows.
* - Rows with the 'tabledrag-root' class cannot be nested under a parent row.
*
* Calling drupal_add_tabledrag() would then be written as such:
* @code
* drupal_add_tabledrag('my-module-table', 'order', 'sibling', 'my-elements-weight');
* @endcode
*
* In a more complex case where there are several groups in one column (such as
* the block regions on the admin/structure/block page), a separate subgroup class
* must also be added to differentiate the groups.
* @code
* $form['my_elements'][$region][$delta]['weight']['#attributes']['class'] = array('my-elements-weight', 'my-elements-weight-' . $region);
* @endcode
*
* $group is still 'my-element-weight', and the additional $subgroup variable
* will be passed in as 'my-elements-weight-' . $region. This also means that
* you'll need to call drupal_add_tabledrag() once for every region added.
*
* @code
* foreach ($regions as $region) {
* drupal_add_tabledrag('my-module-table', 'order', 'sibling', 'my-elements-weight', 'my-elements-weight-' . $region);
* }
* @endcode
*
* In a situation where tree relationships are present, adding multiple
* subgroups is not necessary, because the table will contain indentations that
* provide enough information about the sibling and parent relationships.
* See theme_menu_overview_form() for an example creating a table containing
* parent relationships.
*
* Please note that this function should be called from the theme layer, such as
* in a .tpl.php file, theme_ function, or in a template_preprocess function,
* not in a form declaration. Though the same JavaScript could be added to the
* page using drupal_add_js() directly, this function helps keep template files
* clean and readable. It also prevents tabledrag.js from being added twice
* accidentally.
*
* @param $table_id
* String containing the target table's id attribute. If the table does not
* have an id, one will need to be set, such as <table id="my-module-table">.
* @param $action
* String describing the action to be done on the form item. Either 'match'
* 'depth', or 'order'. Match is typically used for parent relationships.
* Order is typically used to set weights on other form elements with the same
* group. Depth updates the target element with the current indentation.
* @param $relationship
* String describing where the $action variable should be performed. Either
* 'parent', 'sibling', 'group', or 'self'. Parent will only look for fields
* up the tree. Sibling will look for fields in the same group in rows above
* and below it. Self affects the dragged row itself. Group affects the
* dragged row, plus any children below it (the entire dragged group).
* @param $group
* A class name applied on all related form elements for this action.
* @param $subgroup
* (optional) If the group has several subgroups within it, this string should
* contain the class name identifying fields in the same subgroup.
* @param $source
* (optional) If the $action is 'match', this string should contain the class
* name identifying what field will be used as the source value when matching
* the value in $subgroup.
* @param $hidden
* (optional) The column containing the field elements may be entirely hidden * from view dynamically when the JavaScript is loaded. Set to FALSE if the
* column should not be hidden.
* @param $limit
* (optional) Limit the maximum amount of parenting in this table.
* @see block-admin-display-form.tpl.php
* @see theme_menu_overview_form()
*/
function drupal_add_tabledrag($table_id, $action, $relationship, $group, $subgroup = NULL, $source = NULL, $hidden = TRUE, $limit = 0) {
$js_added = &drupal_static(__FUNCTION__, FALSE);
if (!$js_added) {
// Add the table drag JavaScript to the page before the module JavaScript
// to ensure that table drag behaviors are registered before any module
// uses it.
drupal_add_library('system', 'jquery.cookie');
drupal_add_js('misc/tabledrag.js', array('weight' => -1));
$js_added = TRUE;
}
// If a subgroup or source isn't set, assume it is the same as the group.
$target = isset($subgroup) ? $subgroup : $group;
$source = isset($source) ? $source : $target;
$settings['tableDrag'][$table_id][$group][] = array(
'target' => $target,
'source' => $source,
'relationship' => $relationship,
'action' => $action,
'hidden' => $hidden,
'limit' => $limit,
);
drupal_add_js($settings, 'setting');
}
/**
* Aggregates JavaScript files into a cache file in the files directory.
*
* The file name for the JavaScript cache file is generated from the hash of
* the aggregated contents of the files in $files. This forces proxies and
* browsers to download new JavaScript when the JavaScript changes.
*
* The cache file name is retrieved on a page load via a lookup variable that
* contains an associative array. The array key is the hash of the names in
* $files while the value is the cache file name. The cache file is generated
* in two cases. First, if there is no file name value for the key, which will
* happen if a new file name has been added to $files or after the lookup
* variable is emptied to force a rebuild of the cache. Second, the cache
* file is generated if it is missing on disk. Old cache files are not deleted
* immediately when the lookup variable is emptied, but are deleted after a set
* period by drupal_delete_file_if_stale(). This ensures that files referenced
* by a cached page will still be available.
*
* @param $files
* An array of JavaScript files to aggregate and compress into one file.
*
* @return
* The URI of the cache file, or FALSE if the file could not be saved.
*/
function drupal_build_js_cache($files) {
$contents = '';
$uri = '';
$map = variable_get('drupal_js_cache_files', array());
$key = hash('sha256', serialize($files));
if (isset($map[$key])) {
$uri = $map[$key];
}
if (empty($uri) || !file_exists($uri)) {
// Build aggregate JS file.
foreach ($files as $path => $info) {
if ($info['preprocess']) {
// Append a ';' and a newline after each JS file to prevent them from running together. $contents .= file_get_contents($path) . ";\n";
}
}
// Prefix filename to prevent blocking by firewalls which reject files
// starting with "ad*".
$filename = 'js_' . drupal_hash_base64($contents) . '.js';
// Create the js/ within the files folder.
$jspath = 'public://js';
$uri = $jspath . '/' . $filename;
// Create the JS file.
file_prepare_directory($jspath, FILE_CREATE_DIRECTORY);
if (!file_exists($uri) && !file_unmanaged_save_data($contents, $uri, FILE_EXISTS_REPLACE)) {
return FALSE;
}
// If JS gzip compression is enabled, clean URLs are enabled (which means
// that rewrite rules are working) and the zlib extension is available then
// create a gzipped version of this file. This file is served conditionally
// to browsers that accept gzip using .htaccess rules.
if (variable_get('js_gzip_compression', TRUE) && variable_get('clean_url', 0) && extension_loaded('zlib')) {
if (!file_exists($uri . '.gz') && !file_unmanaged_save_data(gzencode($contents, 9, FORCE_GZIP), $uri . '.gz', FILE_EXISTS_REPLACE)) {
return FALSE;
}
}
$map[$key] = $uri;
variable_set('drupal_js_cache_files', $map);
}
return $uri;
}
/**
* Deletes old cached JavaScript files and variables.
*/
function drupal_clear_js_cache() {
variable_del('javascript_parsed');
variable_del('drupal_js_cache_files');
file_scan_directory('public://js', '/.*/', array('callback' => 'drupal_delete_file_if_stale'));
}
/**
* Converts a PHP variable into its JavaScript equivalent.
*
* We use HTML-safe strings, i.e. with <, > and & escaped.
*
* @see drupal_json_decode()
* @ingroup php_wrappers
*/
function drupal_json_encode($var) {
// json_encode() does not escape <, > and &, so we do it with str_replace().
return str_replace(array('<', '>', '&'), array('\u003c', '\u003e', '\u0026'), json_encode($var));
}
/**
* Converts an HTML-safe JSON string into its PHP equivalent.
*
* @see drupal_json_encode()
* @ingroup php_wrappers
*/
function drupal_json_decode($var) {
return json_decode($var, TRUE);
}
/**
* Return data in JSON format.
*
* This function should be used for JavaScript callback functions returning
* data in JSON format. It sets the header for JavaScript output.
*
* @param $var
* (optional) If set, the variable will be converted to JSON and output.
*/function drupal_json_output($var = NULL) {
// We are returning JSON, so tell the browser.
drupal_add_http_header('Content-Type', 'application/json');
if (isset($var)) {
echo drupal_json_encode($var);
}
}
/**
* Get a salt useful for hardening against SQL injection.
*
* @return
* A salt based on information in settings.php, not in the database.
*/
function drupal_get_hash_salt() {
global $drupal_hash_salt, $databases;
// If the $drupal_hash_salt variable is empty, a hash of the serialized
// database credentials is used as a fallback salt.
return empty($drupal_hash_salt) ? hash('sha256', serialize($databases)) : $drupal_hash_salt;
}
/**
* Ensure the private key variable used to generate tokens is set.
*
* @return
* The private key.
*/
function drupal_get_private_key() {
if (!($key = variable_get('drupal_private_key', 0))) {
$key = drupal_hash_base64(drupal_random_bytes(55));
variable_set('drupal_private_key', $key);
}
return $key;
}
/**
* Generate a token based on $value, the current user session and private key.
*
* @param $value
* An additional value to base the token on.
*/
function drupal_get_token($value = '') {
return drupal_hmac_base64($value, session_id() . drupal_get_private_key() . drupal_get_hash_salt());
}
/**
* Validate a token based on $value, the current user session and private key.
*
* @param $token
* The token to be validated.
* @param $value
* An additional value to base the token on.
* @param $skip_anonymous
* Set to true to skip token validation for anonymous users.
* @return
* True for a valid token, false for an invalid token. When $skip_anonymous
* is true, the return value will always be true for anonymous users.
*/
function drupal_valid_token($token, $value = '', $skip_anonymous = FALSE) {
global $user;
return (($skip_anonymous && $user->uid == 0) || ($token == drupal_get_token($value)));
}
function _drupal_bootstrap_full() {
static $called = FALSE;
if ($called) {
return;
} $called = TRUE;
require_once DRUPAL_ROOT . '/' . variable_get('path_inc', 'includes/path.inc');
require_once DRUPAL_ROOT . '/includes/theme.inc';
require_once DRUPAL_ROOT . '/includes/pager.inc';
require_once DRUPAL_ROOT . '/' . variable_get('menu_inc', 'includes/menu.inc');
require_once DRUPAL_ROOT . '/includes/tablesort.inc';
require_once DRUPAL_ROOT . '/includes/file.inc';
require_once DRUPAL_ROOT . '/includes/unicode.inc';
require_once DRUPAL_ROOT . '/includes/image.inc';
require_once DRUPAL_ROOT . '/includes/form.inc';
require_once DRUPAL_ROOT . '/includes/mail.inc';
require_once DRUPAL_ROOT . '/includes/actions.inc';
require_once DRUPAL_ROOT . '/includes/ajax.inc';
require_once DRUPAL_ROOT . '/includes/token.inc';
require_once DRUPAL_ROOT . '/includes/errors.inc';
// Detect string handling method
unicode_check();
// Undo magic quotes
fix_gpc_magic();
// Load all enabled modules
module_load_all();
// Make sure all stream wrappers are registered.
file_get_stream_wrappers();
$test_info = &$GLOBALS['drupal_test_info'];
if (!empty($test_info['in_child_site'])) {
// Running inside the simpletest child site, log fatal errors to test
// specific file directory.
ini_set('log_errors', 1);
ini_set('error_log', 'public://error.log');
}
// Initialize $_GET['q'] prior to invoking hook_init().
drupal_path_initialize();
// Let all modules take action before the menu system handles the request.
// We do not want this while running update.php.
if (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') {
// Prior to invoking hook_init(), initialize the theme (potentially a custom
// one for this page), so that:
// - Modules with hook_init() implementations that call theme() or
// theme_get_registry() don't initialize the incorrect theme.
// - The theme can have hook_*_alter() implementations affect page building
// (e.g., hook_form_alter(), hook_node_view_alter(), hook_page_alter()),
// ahead of when rendering starts.
menu_set_custom_theme();
drupal_theme_initialize();
module_invoke_all('init');
}
}
/**
* Store the current page in the cache.
*
* If page_compression is enabled, a gzipped version of the page is stored in
* the cache to avoid compressing the output on each request. The cache entry
* is unzipped in the relatively rare event that the page is requested by a
* client without gzip support.
*
* Page compression requires the PHP zlib extension
* (http://php.net/manual/en/ref.zlib.php).
*
* @see drupal_page_header()
*/
function drupal_page_set_cache() {
global $base_root;
if (drupal_page_is_cacheable()) {
$cache = (object) array( 'cid' => $base_root . request_uri(),
'data' => array(
'path' => $_GET['q'],
'body' => ob_get_clean(),
'title' => drupal_get_title(),
'headers' => array(),
),
'expire' => CACHE_TEMPORARY,
'created' => REQUEST_TIME,
);
// Restore preferred header names based on the lower-case names returned
// by drupal_get_http_header().
$header_names = _drupal_set_preferred_header_name();
foreach (drupal_get_http_header() as $name_lower => $value) {
$cache->data['headers'][$header_names[$name_lower]] = $value;
if ($name_lower == 'expires') {
// Use the actual timestamp from an Expires header if available.
$cache->expire = strtotime($value);
}
}
if ($cache->data['body']) {
if (variable_get('page_compression', TRUE) && extension_loaded('zlib')) {
$cache->data['body'] = gzencode($cache->data['body'], 9, FORCE_GZIP);
}
cache_set($cache->cid, $cache->data, 'cache_page', $cache->expire);
}
return $cache;
}
}
/**
* Executes a cron run when called.
*
* Do not call this function from test, use $this->cronRun() instead.
*
* @return
* Returns TRUE if ran successfully
*/
function drupal_cron_run() {
// Allow execution to continue even if the request gets canceled.
@ignore_user_abort(TRUE);
// Prevent session information from being saved while cron is running.
drupal_save_session(FALSE);
// Force the current user to anonymous to ensure consistent permissions on
// cron runs.
$original_user = $GLOBALS['user'];
$GLOBALS['user'] = drupal_anonymous_user();
// Try to allocate enough time to run all the hook_cron implementations.
drupal_set_time_limit(240);
$return = FALSE;
// Grab the defined cron queues.
$queues = module_invoke_all('cron_queue_info');
drupal_alter('cron_queue_info', $queues);
// Try to acquire cron lock.
if (!lock_acquire('cron', 240.0)) {
// Cron is still running normally.
watchdog('cron', 'Attempting to re-run cron while it is already running.', array(), WATCHDOG_WARNING);
}
else {
// Make sure every queue exists. There is no harm in trying to recreate an
// existing queue.
foreach ($queues as $queue_name => $info) {
DrupalQueue::get($queue_name)->createQueue(); }
// Register shutdown callback
drupal_register_shutdown_function('drupal_cron_cleanup');
// Iterate through the modules calling their cron handlers (if any):
module_invoke_all('cron');
// Record cron time
variable_set('cron_last', REQUEST_TIME);
watchdog('cron', 'Cron run completed.', array(), WATCHDOG_NOTICE);
// Release cron lock.
lock_release('cron');
// Return TRUE so other functions can check if it did run successfully
$return = TRUE;
}
foreach ($queues as $queue_name => $info) {
$function = $info['worker callback'];
$end = time() + (isset($info['time']) ? $info['time'] : 15);
$queue = DrupalQueue::get($queue_name);
while (time() < $end && ($item = $queue->claimItem())) {
$function($item->data);
$queue->deleteItem($item);
}
}
// Restore the user.
$GLOBALS['user'] = $original_user;
drupal_save_session(TRUE);
return $return;
}
/**
* Shutdown function for cron cleanup.
*/
function drupal_cron_cleanup() {
// See if the semaphore is still locked.
if (variable_get('cron_semaphore', FALSE)) {
watchdog('cron', 'Cron run exceeded the time limit and was aborted.', array(), WATCHDOG_WARNING);
// Release cron semaphore
variable_del('cron_semaphore');
}
}
/**
* Returns information about system object files (modules, themes, etc.).
*
* This function is used to find all or some system object files (module files,
* theme files, etc.) that exist on the site. It searches in several locations,
* depending on what type of object you are looking for. For instance, if you
* are looking for modules and call:
* @code
* drupal_system_listing("/\.module$/", "modules", 'name', 0);
* @endcode
* this function will search the site-wide modules directory (i.e., /modules/),
* your install profile's directory (i.e.,
* /profiles/your_site_profile/modules/), the all-sites directory (i.e.,
* /sites/all/modules/), and your site-specific directory (i.e.,
* /sites/your_site_dir/modules/), in that order, and return information about
* all of the files ending in .module in those directories.
*
* The information is returned in an associative array, which can be keyed on
* the file name ($key = 'filename'), the file name without the extension ($key
* = 'name'), or the full file stream URI ($key = 'uri'). If you use a key of
* 'filename' or 'name', files found later in the search will take precedence
* over files found earlier (unless they belong to a module or theme not
* compatible with Drupal core); if you choose a key of 'uri', you will get all * files found.
*
* @param string $mask
* The preg_match() regular expression for the files to find.
* @param string $directory
* The subdirectory name in which the files are found. For example,
* 'modules' will search in sub-directories of the top-level /modules
* directory, sub-directories of /sites/all/modules/, etc.
* @param string $key
* The key to be used for the associative array returned. Possible values are
* 'uri', for the file's URI; 'filename', for the basename of the file; and
* 'name' for the name of the file without the extension. If you choose 'name'
* or 'filename', only the highest-precedence file will be returned.
* @param int $min_depth
* Minimum depth of directories to return files from, relative to each
* directory searched. For instance, a minimum depth of 2 would find modules
* inside /modules/node/tests, but not modules directly in /modules/node.
*
* @return array
* An associative array of file objects, keyed on the chosen key. Each element
* in the array is an object containing file information, with properties:
* - 'uri': Full URI of the file.
* - 'filename': File name.
* - 'name': Name of file without the extension.
*/
function drupal_system_listing($mask, $directory, $key = 'name', $min_depth = 1) {
$config = conf_path();
$profile = drupal_get_profile();
$searchdir = array($directory);
$files = array();
// The 'profiles' directory contains pristine collections of modules and
// themes as organized by a distribution. It is pristine in the same way
// that /modules is pristine for core; users should avoid changing anything
// there in favor of sites/all or sites/<domain> directories.
if (file_exists("profiles/$profile/$directory")) {
$searchdir[] = "profiles/$profile/$directory";
}
// Always search sites/all/* as well as the global directories
$searchdir[] = 'sites/all/' . $directory;
if (file_exists("$config/$directory")) {
$searchdir[] = "$config/$directory";
}
// Get current list of items
if (!function_exists('file_scan_directory')) {
require_once DRUPAL_ROOT . '/includes/file.inc';
}
foreach ($searchdir as $dir) {
$files_to_add = file_scan_directory($dir, $mask, array('key' => $key, 'min_depth' => $min_depth));
// Duplicate files found in later search directories take precedence over
// earlier ones, so we want them to overwrite keys in our resulting
// $files array.
// The exception to this is if the later file is from a module or theme not
// compatible with Drupal core. This may occur during upgrades of Drupal
// core when new modules exist in core while older contrib modules with the
// same name exist in a directory such as sites/all/modules/.
foreach (array_intersect_key($files_to_add, $files) as $file_key => $file) {
// If it has no info file, then we just behave liberally and accept the
// new resource on the list for merging.
if (file_exists($info_file = dirname($file->uri) . '/' . $file->name . '.info')) {
// Get the .info file for the module or theme this file belongs to.
$info = drupal_parse_info_file($info_file);
// If the module or theme is incompatible with Drupal core, remove it // from the array for the current search directory, so it is not
// overwritten when merged with the $files array.
if (isset($info['core']) && $info['core'] != DRUPAL_CORE_COMPATIBILITY) {
unset($files_to_add[$file_key]);
}
}
}
$files = array_merge($files, $files_to_add);
}
return $files;
}
/**
* Set the main page content value for later use.
*
* Given the nature of the Drupal page handling, this will be called once with
* a string or array. We store that and return it later as the block is being
* displayed.
*
* @param $content
* A string or renderable array representing the body of the page.
* @return
* If called without $content, a renderable array representing the body of
* the page.
*/
function drupal_set_page_content($content = NULL) {
$content_block = &drupal_static(__FUNCTION__, NULL);
$main_content_display = &drupal_static('system_main_content_added', FALSE);
if (!empty($content)) {
$content_block = (is_array($content) ? $content : array('main' => array('#markup' => $content)));
}
else {
// Indicate that the main content has been requested. We assume that
// the module requesting the content will be adding it to the page.
// A module can indicate that it does not handle the content by setting
// the static variable back to FALSE after calling this function.
$main_content_display = TRUE;
return $content_block;
}
}
/**
* #pre_render callback to render #browsers into #prefix and #suffix.
*
* @param $elements
* A render array with a '#browsers' property. The '#browsers' property can
* contain any or all of the following keys:
* - 'IE': If FALSE, the element is not rendered by Internet Explorer. If
* TRUE, the element is rendered by Internet Explorer. Can also be a string
* containing an expression for Internet Explorer to evaluate as part of a
* conditional comment. For example, this can be set to 'lt IE 7' for the
* element to be rendered in Internet Explorer 6, but not in Internet
* Explorer 7 or higher. Defaults to TRUE.
* - '!IE': If FALSE, the element is not rendered by browsers other than
* Internet Explorer. If TRUE, the element is rendered by those browsers.
* Defaults to TRUE.
* Examples:
* - To render an element in all browsers, '#browsers' can be left out or set
* to array('IE' => TRUE, '!IE' => TRUE).
* - To render an element in Internet Explorer only, '#browsers' can be set
* to array('!IE' => FALSE).
* - To render an element in Internet Explorer 6 only, '#browsers' can be set
* to array('IE' => 'lt IE 7', '!IE' => FALSE).
* - To render an element in Internet Explorer 8 and higher and in all other
* browsers, '#browsers' can be set to array('IE' => 'gte IE 8').
*
* @return
* The passed-in element with markup for conditional comments potentially * added to '#prefix' and '#suffix'.
*/
function drupal_pre_render_conditional_comments($elements) {
$browsers = isset($elements['#browsers']) ? $elements['#browsers'] : array();
$browsers += array(
'IE' => TRUE,
'!IE' => TRUE,
);
// If rendering in all browsers, no need for conditional comments.
if ($browsers['IE'] === TRUE && $browsers['!IE']) {
return $elements;
}
// Determine the conditional comment expression for Internet Explorer to
// evaluate.
if ($browsers['IE'] === TRUE) {
$expression = 'IE';
}
elseif ($browsers['IE'] === FALSE) {
$expression = '!IE';
}
else {
$expression = $browsers['IE'];
}
// Wrap the element's potentially existing #prefix and #suffix properties with
// conditional comment markup. The conditional comment expression is evaluated
// by Internet Explorer only. To control the rendering by other browsers,
// either the "downlevel-hidden" or "downlevel-revealed" technique must be
// used. See http://en.wikipedia.org/wiki/Conditional_comment for details.
$elements += array(
'#prefix' => '',
'#suffix' => '',
);
if (!$browsers['!IE']) {
// "downlevel-hidden".
$elements['#prefix'] = "\n<!--[if $expression]>\n" . $elements['#prefix'];
$elements['#suffix'] .= "<![endif]-->\n";
}
else {
// "downlevel-revealed".
$elements['#prefix'] = "\n<!--[if $expression]><!-->\n" . $elements['#prefix'];
$elements['#suffix'] .= "<!--<![endif]-->\n";
}
return $elements;
}
/**
* #pre_render callback to render a link into #markup.
*
* Doing so during pre_render gives modules a chance to alter the link parts.
*
* @param $elements
* A structured array whose keys form the arguments to l():
* - #title: The link text to pass as argument to l().
* - #href: The URL path component to pass as argument to l().
* - #options: (optional) An array of options to pass to l().
*
* @return
* The passed-in elements containing a rendered link in '#markup'.
*/
function drupal_pre_render_link($element) {
// By default, link options to pass to l() are normally set in #options.
$element += array('#options' => array());
// However, within the scope of renderable elements, #attributes is a valid
// way to specify attributes, too. Take them into account, but do not override
// attributes from #options.
if (isset($element['#attributes'])) { $element['#options'] += array('attributes' => array());
$element['#options']['attributes'] += $element['#attributes'];
}
// This #pre_render callback can be invoked from inside or outside of a Form
// API context, and depending on that, a HTML ID may be already set in
// different locations. #options should have precedence over Form API's #id.
// #attributes have been taken over into #options above already.
if (isset($element['#options']['attributes']['id'])) {
$element['#id'] = $element['#options']['attributes']['id'];
}
elseif (isset($element['#id'])) {
$element['#options']['attributes']['id'] = $element['#id'];
}
// Conditionally invoke ajax_pre_render_element(), if #ajax is set.
if (isset($element['#ajax']) && !isset($element['#ajax_processed'])) {
// If no HTML ID was found above, automatically create one.
if (!isset($element['#id'])) {
$element['#id'] = $element['#options']['attributes']['id'] = drupal_html_id('ajax-link');
}
// If #ajax['path] was not specified, use the href as Ajax request URL.
if (!isset($element['#ajax']['path'])) {
$element['#ajax']['path'] = $element['#href'];
$element['#ajax']['options'] = $element['#options'];
}
$element = ajax_pre_render_element($element);
}
$element['#markup'] = l($element['#title'], $element['#href'], $element['#options']);
return $element;
}
/**
* #pre_render callback that collects child links into a single array.
*
* This function can be added as a pre_render callback for a renderable array,
* usually one which will be themed by theme_links(). It iterates through all
* unrendered children of the element, collects any #links properties it finds,
* merges them into the parent element's #links array, and prevents those
* children from being rendered separately.
*
* The purpose of this is to allow links to be logically grouped into related
* categories, so that each child group can be rendered as its own list of
* links if drupal_render() is called on it, but calling drupal_render() on the
* parent element will still produce a single list containing all the remaining
* links, regardless of what group they were in.
*
* A typical example comes from node links, which are stored in a renderable
* array similar to this:
* @code
* $node->content['links'] = array(
* '#theme' => 'links__node',
* '#pre_render' = array('drupal_pre_render_links'),
* 'comment' => array(
* '#theme' => 'links__node__comment',
* '#links' => array(
* // An array of links associated with node comments, suitable for
* // passing in to theme_links().
* ),
* ),
* 'statistics' => array(
* '#theme' => 'links__node__statistics',
* '#links' => array(
* // An array of links associated with node statistics, suitable for
* // passing in to theme_links().
* ),
* ),
* 'translation' => array(
* '#theme' => 'links__node__translation', * '#links' => array(
* // An array of links associated with node translation, suitable for
* // passing in to theme_links().
* ),
* ),
* );
* @endcode
*
* In this example, the links are grouped by functionality, which can be
* helpful to themers who want to display certain kinds of links independently.
* For example, adding this code to node.tpl.php will result in the comment
* links being rendered as a single list:
* @code
* print render($content['links']['comment']);
* @endcode
*
* (where $node->content has been transformed into $content before handing
* control to the node.tpl.php template).
*
* The pre_render function defined here allows the above flexibility, but also
* allows the following code to be used to render all remaining links into a
* single list, regardless of their group:
* @code
* print render($content['links']);
* @endcode
*
* In the above example, this will result in the statistics and translation
* links being rendered together in a single list (but not the comment links,
* which were rendered previously on their own).
*
* Because of the way this function works, the individual properties of each
* group (for example, a group-specific #theme property such as
* 'links__node__comment' in the example above, or any other property such as
* #attributes or #pre_render that is attached to it) are only used when that
* group is rendered on its own. When the group is rendered together with other
* children, these child-specific properties are ignored, and only the overall
* properties of the parent are used.
*/
function drupal_pre_render_links($element) {
$element += array('#links' => array());
foreach (element_children($element) as $key) {
$child = &$element[$key];
// If the child has links which have not been printed yet and the user has
// access to it, merge its links in to the parent.
if (isset($child['#links']) && empty($child['#printed']) && (!isset($child['#access']) || $child['#access'])) {
$element['#links'] += $child['#links'];
// Mark the child as having been printed already (so that its links
// cannot be mistakenly rendered twice).
$child['#printed'] = TRUE;
}
}
return $element;
}
/**
* #pre_render callback to append contents in #markup to #children.
*
* This needs to be a #pre_render callback, because eventually assigned
* #theme_wrappers will expect the element's rendered content in #children.
* Note that if also a #theme is defined for the element, then the result of
* the theme callback will override #children.
*
* @see drupal_render()
*
* @param $elements
* A structured array using the #markup key.
*
* @return
* The passed-in elements, but #markup appended to #children.
*/function drupal_pre_render_markup($elements) {
$elements['#children'] = $elements['#markup'];
return $elements;
}
/**
* Renders the page, including all theming.
*
* @param $page
* A string or array representing the content of a page. The array consists of
* the following keys:
* - #type: Value is always 'page'. This pushes the theming through page.tpl.php (required).
* - #show_messages: Suppress drupal_get_message() items. Used by Batch API (optional).
*
* @see hook_page_alter()
* @see element_info()
*/
function drupal_render_page($page) {
$main_content_display = &drupal_static('system_main_content_added', FALSE);
// Allow menu callbacks to return strings or arbitrary arrays to render.
// If the array returned is not of #type page directly, we need to fill
// in the page with defaults.
if (is_string($page) || (is_array($page) && (!isset($page['#type']) || ($page['#type'] != 'page')))) {
drupal_set_page_content($page);
$page = element_info('page');
}
// Modules can add elements to $page as needed in hook_page_build().
foreach (module_implements('page_build') as $module) {
$function = $module . '_page_build';
$function($page);
}
// Modules alter the $page as needed. Blocks are populated into regions like
// 'sidebar_first', 'footer', etc.
drupal_alter('page', $page);
// If no module has taken care of the main content, add it to the page now.
// This allows the site to still be usable even if no modules that
// control page regions (for example, the Block module) are enabled.
if (!$main_content_display) {
$page['content']['system_main'] = drupal_set_page_content();
}
return drupal_render($page);
}
/**
* Renders HTML given a structured array tree.
*
* Recursively iterates over each of the array elements, generating HTML code.
*
* HTML generation is controlled by two properties containing theme functions,
* #theme and #theme_wrappers.
*
* #theme is the theme function called first. If it is set and the element has
* any children, they have to be rendered there. For elements that are not
* allowed to have any children, e.g. buttons or textfields, it can be used to
* render the element itself. If #theme is not present and the element has
* children, they are rendered and concatenated into a string by
* drupal_render_children().
*
* The #theme_wrappers property contains an array of theme functions which will
* be called, in order, after #theme has run. These can be used to add further
* markup around the rendered children; e.g., fieldsets add the required markup
* for a fieldset around their rendered child elements. All wrapper theme
* functions have to include the element's #children property in their output,
* as it contains the output of the previous theme functions and the rendered
* children.
* * For example, for the form element type, by default only the #theme_wrappers
* property is set, which adds the form markup around the rendered child
* elements of the form. This allows you to set the #theme property on a
* specific form to a custom theme function, giving you complete control over
* the placement of the form's children while not at all having to deal with
* the form markup itself.
*
* drupal_render() can optionally cache the rendered output of elements to
* improve performance. To use drupal_render() caching, set the element's #cache
* property to an associative array with one or several of the following keys:
* - 'keys': An array of one or more keys that identify the element. If 'keys'
* is set, the cache ID is created automatically from these keys. See
* drupal_render_cid_create().
* - 'granularity' (optional): Define the cache granularity using binary
* combinations of the cache granularity constants, e.g. DRUPAL_CACHE_PER_USER
* to cache for each user separately or
* DRUPAL_CACHE_PER_PAGE | DRUPAL_CACHE_PER_ROLE to cache separately for each
* page and role. If not specified the element is cached globally for each
* theme and language.
* - 'cid': Specify the cache ID directly. Either 'keys' or 'cid' is required.
* If 'cid' is set, 'keys' and 'granularity' are ignored. Use only if you
* have special requirements.
* - 'expire': Set to one of the cache lifetime constants.
* - 'bin': Specify a cache bin to cache the element in. Defaults to 'cache'.
*
* This function is usually called from within another function, like
* drupal_get_form() or a theme function. Elements are sorted internally
* using uasort(). Since this is expensive, when passing already sorted
* elements to drupal_render(), for example from a database query, set
* $elements['#sorted'] = TRUE to avoid sorting them a second time.
*
* drupal_render() flags each element with a '#printed' status to indicate that
* the element has been rendered, which allows individual elements of a given
* array to be rendered independently and prevents them from being rendered
* more than once on subsequent calls to drupal_render() (e.g., as part of a
* larger array). If the same array or array element is passed more than once
* to drupal_render(), it simply returns a NULL value.
*
* @param $elements
* The structured array describing the data to be rendered.
* @return
* The rendered HTML.
*/
function drupal_render(&$elements) {
// Early-return nothing if user does not have access.
if (empty($elements) || (isset($elements['#access']) && !$elements['#access'])) {
return;
}
// Do not print elements twice.
if (!empty($elements['#printed'])) {
return;
}
// Try to fetch the element's markup from cache and return.
if (isset($elements['#cache']) && $cached_output = drupal_render_cache_get($elements)) {
return $cached_output;
}
// If #markup is set, ensure #type is set. This allows to specify just #markup
// on an element without setting #type.
if (isset($elements['#markup']) && !isset($elements['#type'])) {
$elements['#type'] = 'markup';
}
// If the default values for this element have not been loaded yet, populate
// them.
if (isset($elements['#type']) && empty($elements['#defaults_loaded'])) {
$elements += element_info($elements['#type']);
}
// Make any final changes to the element before it is rendered. This means
// that the $element or the children can be altered or corrected before the
// element is rendered into the final text.
if (isset($elements['#pre_render'])) {
foreach ($elements['#pre_render'] as $function) {
if (function_exists($function)) {
$elements = $function($elements);
}
}
}
// Allow #pre_render to abort rendering.
if (!empty($elements['#printed'])) {
return;
}
// Get the children of the element, sorted by weight.
$children = element_children($elements, TRUE);
// Initialize this element's #children, unless a #pre_render callback already
// preset #children.
if (!isset($elements['#children'])) {
$elements['#children'] = '';
}
// Call the element's #theme function if it is set. Then any children of the
// element have to be rendered there.
if (isset($elements['#theme'])) {
$elements['#children'] = theme($elements['#theme'], $elements);
}
// If #theme was not set and the element has children, render them now.
// This is the same process as drupal_render_children() but is inlined
// for speed.
if ($elements['#children'] == '') {
foreach ($children as $key) {
$elements['#children'] .= drupal_render($elements[$key]);
}
}
// Let the theme functions in #theme_wrappers add markup around the rendered
// children.
if (isset($elements['#theme_wrappers'])) {
foreach ($elements['#theme_wrappers'] as $theme_wrapper) {
$elements['#children'] = theme($theme_wrapper, $elements);
}
}
// Filter the outputted content and make any last changes before the
// content is sent to the browser. The changes are made on $content
// which allows the output'ed text to be filtered.
if (isset($elements['#post_render'])) {
foreach ($elements['#post_render'] as $function) {
if (function_exists($function)) {
$elements['#children'] = $function($elements['#children'], $elements);
}
}
}
// Add any JavaScript state information associated with the element.
if (!empty($elements['#states'])) {
drupal_process_states($elements);
}
// Add additional libraries, CSS, JavaScript an other custom
// attached data associated with this element.
if (!empty($elements['#attached'])) {
drupal_process_attached($elements);
}
$prefix = isset($elements['#prefix']) ? $elements['#prefix'] : ''; $suffix = isset($elements['#suffix']) ? $elements['#suffix'] : '';
$output = $prefix . $elements['#children'] . $suffix;
// Cache the processed element if #cache is set.
if (isset($elements['#cache'])) {
drupal_render_cache_set($output, $elements);
}
$elements['#printed'] = TRUE;
return $output;
}
/**
* Render children of an element and concatenate them.
*
* This renders all children of an element using drupal_render() and then
* joins them together into a single string.
*
* @param $element
* The structured array whose children shall be rendered.
* @param $children_keys
* If the keys of the element's children are already known, they can be passed
* in to save another run of element_children().
*/
function drupal_render_children(&$element, $children_keys = NULL) {
if ($children_keys === NULL) {
$children_keys = element_children($element);
}
$output = '';
foreach ($children_keys as $key) {
if (!empty($element[$key])) {
$output .= drupal_render($element[$key]);
}
}
return $output;
}
/**
* Render an element.
*
* This function renders an element using drupal_render(). The top level
* element is shown with show() before rendering, so it will always be rendered
* even if hide() had been previously used on it.
*
* @param $element
* The element to be rendered.
*
* @return
* The rendered element.
*
* @see drupal_render()
* @see show()
* @see hide()
*/
function render(&$element) {
if (is_array($element)) {
show($element);
return drupal_render($element);
}
else {
// Safe-guard for inappropriate use of render() on flat variables: return
// the variable as-is.
return $element;
}
}
/**
* Hide an element from later rendering.
*
* The first time render() or drupal_render() is called on an element tree, * as each element in the tree is rendered, it is marked with a #printed flag
* and the rendered children of the element are cached. Subsequent calls to
* render() or drupal_render() will not traverse the child tree of this element
* again: they will just use the cached children. So if you want to hide an
* element, be sure to call hide() on the element before its parent tree is
* rendered for the first time, as it will have no effect on subsequent
* renderings of the parent tree.
*
* @param $element
* The element to be hidden.
*
* @return
* The element.
*
* @see render()
* @see show()
*/
function hide(&$element) {
$element['#printed'] = TRUE;
return $element;
}
/**
* Show a hidden element for later rendering.
*
* You can also use render($element), which shows the element while rendering
* it.
*
* The first time render() or drupal_render() is called on an element tree,
* as each element in the tree is rendered, it is marked with a #printed flag
* and the rendered children of the element are cached. Subsequent calls to
* render() or drupal_render() will not traverse the child tree of this element
* again: they will just use the cached children. So if you want to show an
* element, be sure to call show() on the element before its parent tree is
* rendered for the first time, as it will have no effect on subsequent
* renderings of the parent tree.
*
* @param $element
* The element to be shown.
*
* @return
* The element.
*
* @see render()
* @see hide()
*/
function show(&$element) {
$element['#printed'] = FALSE;
return $element;
}
/**
* Get the rendered output of a renderable element from cache.
*
* @see drupal_render()
* @see drupal_render_cache_set()
*
* @param $elements
* A renderable array.
* @return
* A markup string containing the rendered content of the element, or FALSE
* if no cached copy of the element is available.
*/
function drupal_render_cache_get($elements) {
if (!in_array($_SERVER['REQUEST_METHOD'], array('GET', 'HEAD')) || !$cid = drupal_render_cid_create($elements)) {
return FALSE;
}
$bin = isset($elements['#cache']['bin']) ? $elements['#cache']['bin'] : 'cache';
if (!empty($cid) && $cache = cache_get($cid, $bin)) { // Add additional libraries, JavaScript, CSS and other data attached
// to this element.
if (isset($cache->data['#attached'])) {
drupal_process_attached($cache->data);
}
// Return the rendered output.
return $cache->data['#markup'];
}
return FALSE;
}
/**
* Cache the rendered output of a renderable element.
*
* This is called by drupal_render() if the #cache property is set on an element.
*
* @see drupal_render()
* @see drupal_render_cache_get()
*
* @param $markup
* The rendered output string of $elements.
* @param $elements
* A renderable array.
*/
function drupal_render_cache_set(&$markup, $elements) {
// Create the cache ID for the element.
if (!in_array($_SERVER['REQUEST_METHOD'], array('GET', 'HEAD')) || !$cid = drupal_render_cid_create($elements)) {
return FALSE;
}
// Cache implementations are allowed to modify the markup, to support
// replacing markup with edge-side include commands. The supporting cache
// backend will store the markup in some other key (like
// $data['#real-value']) and return an include command instead. When the
// ESI command is executed by the content accelerator, the real value can
// be retrieved and used.
$data['#markup'] = &$markup;
// Persist attached data associated with this element.
$attached = drupal_render_collect_attached($elements, TRUE);
if ($attached) {
$data['#attached'] = $attached;
}
$bin = isset($elements['#cache']['bin']) ? $elements['#cache']['bin'] : 'cache';
$expire = isset($elements['#cache']['expire']) ? $elements['#cache']['expire'] : CACHE_PERMANENT;
cache_set($cid, $data, $bin, $expire);
}
/**
* Collect #attached for an element and all child elements into a single array.
*
* When caching elements, it is necessary to collect all libraries, JavaScript
* and CSS into a single array, from both the element itself and all child
* elements. This allows drupal_render() to add these back to the page when the
* element is returned from cache.
*
* @param $elements
* The element to collect #attached from.
* @param $return
* Whether to return the attached elements and reset the internal static.
*
* @return
* The #attached array for this element and its descendants.
*/
function drupal_render_collect_attached($elements, $return = FALSE) {
$attached = &drupal_static(__FUNCTION__, array());
// Collect all #attached for this element.
if (isset($elements['#attached'])) {
foreach ($elements['#attached'] as $key => $value) {
if (!isset($attached[$key])) { $attached[$key] = array();
}
$attached[$key] = array_merge($attached[$key], $value);
}
}
if ($children = element_children($elements)) {
foreach ($children as $child) {
drupal_render_collect_attached($elements[$child]);
}
}
// If this was the first call to the function, return all attached elements
// and reset the static cache.
if ($return) {
$return = $attached;
$attached = array();
return $return;
}
}
/**
* Prepare an element for caching based on a query. This smart caching strategy
* saves Drupal from querying and rendering to HTML when the underlying query is
* unchanged.
*
* Expensive queries should use the query builder to create the query and then
* call this function. Executing the query and formatting results should happen
* in a #pre_render callback.
*
* @param $query
* A select query object as returned by db_select().
* @param $function
* The name of the function doing this caching. A _pre_render suffix will be
* added to this string and is also part of the cache key in
* drupal_render_cache_set() and drupal_render_cache_get().
* @param $expire
* The cache expire time, passed eventually to cache_set().
* @param $granularity
* One or more granularity constants passed to drupal_render_cid_parts().
*
* @return
* A renderable array with the following keys and values:
* - #query: The passed-in $query.
* - #pre_render: $function with a _pre_render suffix.
* - #cache: An associative array prepared for drupal_render_cache_set().
*/
function drupal_render_cache_by_query($query, $function, $expire = CACHE_TEMPORARY, $granularity = NULL) {
$cache_keys = array_merge(array($function), drupal_render_cid_parts($granularity));
$query->preExecute();
$cache_keys[] = hash('sha256', serialize(array((string) $query, $query->getArguments())));
return array(
'#query' => $query,
'#pre_render' => array($function . '_pre_render'),
'#cache' => array(
'keys' => $cache_keys,
'expire' => $expire,
),
);
}
/**
* Helper function for building cache ids.
*
* @param $granularity
* One or more cache granularity constants, e.g. DRUPAL_CACHE_PER_USER to cache
* for each user separately or DRUPAL_CACHE_PER_PAGE | DRUPAL_CACHE_PER_ROLE to
* cache separately for each page and role.
*
* @return
* An array of cache ID parts, always containing the active theme. If the * locale module is enabled it also contains the active language. If
* $granularity was passed in, more parts are added.
*/
function drupal_render_cid_parts($granularity = NULL) {
global $theme, $base_root, $user;
$cid_parts[] = $theme;
// If Locale is enabled but we have only one language we do not need it as cid
// part.
if (drupal_multilingual()) {
foreach (language_types_configurable() as $language_type) {
$cid_parts[] = $GLOBALS[$language_type]->language;
}
}
if (!empty($granularity)) {
// 'PER_ROLE' and 'PER_USER' are mutually exclusive. 'PER_USER' can be a
// resource drag for sites with many users, so when a module is being
// equivocal, we favor the less expensive 'PER_ROLE' pattern.
if ($granularity & DRUPAL_CACHE_PER_ROLE) {
$cid_parts[] = 'r.' . implode(',', array_keys($user->roles));
}
elseif ($granularity & DRUPAL_CACHE_PER_USER) {
$cid_parts[] = "u.$user->uid";
}
if ($granularity & DRUPAL_CACHE_PER_PAGE) {
$cid_parts[] = $base_root . request_uri();
}
}
return $cid_parts;
}
/**
* Create the cache ID for a renderable element.
*
* This creates the cache ID string, either by returning the #cache['cid']
* property if present or by building the cache ID out of the #cache['keys']
* and, optionally, the #cache['granularity'] properties.
*
* @param $elements
* A renderable array.
*
* @return
* The cache ID string, or FALSE if the element may not be cached.
*/
function drupal_render_cid_create($elements) {
if (isset($elements['#cache']['cid'])) {
return $elements['#cache']['cid'];
}
elseif (isset($elements['#cache']['keys'])) {
$granularity = isset($elements['#cache']['granularity']) ? $elements['#cache']['granularity'] : NULL;
// Merge in additional cache ID parts based provided by drupal_render_cid_parts().
$cid_parts = array_merge($elements['#cache']['keys'], drupal_render_cid_parts($granularity));
return implode(':', $cid_parts);
}
return FALSE;
}
/**
* Function used by uasort to sort structured arrays by weight.
*/
function element_sort($a, $b) {
$a_weight = (is_array($a) && isset($a['#weight'])) ? $a['#weight'] : 0;
$b_weight = (is_array($b) && isset($b['#weight'])) ? $b['#weight'] : 0;
if ($a_weight == $b_weight) {
return 0;
}
return ($a_weight < $b_weight) ? -1 : 1;}
/**
* Array sorting callback; sorts elements by title.
*/
function element_sort_by_title($a, $b) {
$a_title = (is_array($a) && isset($a['#title'])) ? $a['#title'] : '';
$b_title = (is_array($b) && isset($b['#title'])) ? $b['#title'] : '';
return strnatcasecmp($a_title, $b_title);
}
/**
* Retrieve the default properties for the defined element type.
*
* @param $type
* An element type as defined by hook_element_info().
*/
function element_info($type) {
// Use the advanced drupal_static() pattern, since this is called very often.
static $drupal_static_fast;
if (!isset($drupal_static_fast)) {
$drupal_static_fast['cache'] = &drupal_static(__FUNCTION__);
}
$cache = &$drupal_static_fast['cache'];
if (!isset($cache)) {
$cache = module_invoke_all('element_info');
foreach ($cache as $element_type => $info) {
$cache[$element_type]['#type'] = $element_type;
}
// Allow modules to alter the element type defaults.
drupal_alter('element_info', $cache);
}
return isset($cache[$type]) ? $cache[$type] : array();
}
/**
* Retrieve a single property for the defined element type.
*
* @param $type
* An element type as defined by hook_element_info().
* @param $property_name
* The property within the element type that should be returned.
* @param $default
* (Optional) The value to return if the element type does not specify a
* value for the property. Defaults to NULL.
*/
function element_info_property($type, $property_name, $default = NULL) {
return (($info = element_info($type)) && array_key_exists($property_name, $info)) ? $info[$property_name] : $default;
}
/**
* Function used by uasort to sort structured arrays by weight, without the property weight prefix.
*/
function drupal_sort_weight($a, $b) {
$a_weight = (is_array($a) && isset($a['weight'])) ? $a['weight'] : 0;
$b_weight = (is_array($b) && isset($b['weight'])) ? $b['weight'] : 0;
if ($a_weight == $b_weight) {
return 0;
}
return ($a_weight < $b_weight) ? -1 : 1;
}
/**
* Array sorting callback; sorts elements by 'title' key.
*/
function drupal_sort_title($a, $b) {
if (!isset($b['title'])) {
return -1; }
if (!isset($a['title'])) {
return 1;
}
return strcasecmp($a['title'], $b['title']);
}
/**
* Check if the key is a property.
*/
function element_property($key) {
return $key[0] == '#';
}
/**
* Get properties of a structured array element. Properties begin with '#'.
*/
function element_properties($element) {
return array_filter(array_keys((array) $element), 'element_property');
}
/**
* Check if the key is a child.
*/
function element_child($key) {
return !isset($key[0]) || $key[0] != '#';
}
/**
* Return the children of an element, optionally sorted by weight.
*
* @param $elements
* The element to be sorted.
* @param $sort
* Boolean to indicate whether the children should be sorted by weight.
* @return
* The array keys of the element's children.
*/
function element_children(&$elements, $sort = FALSE) {
// Do not attempt to sort elements which have already been sorted.
$sort = isset($elements['#sorted']) ? !$elements['#sorted'] : $sort;
// Filter out properties from the element, leaving only children.
$children = array();
$sortable = FALSE;
foreach ($elements as $key => $value) {
if ($key === '' || $key[0] !== '#') {
$children[$key] = $value;
if (is_array($value) && isset($value['#weight'])) {
$sortable = TRUE;
}
}
}
// Sort the children if necessary.
if ($sort && $sortable) {
uasort($children, 'element_sort');
// Put the sorted children back into $elements in the correct order, to
// preserve sorting if the same element is passed through
// element_children() twice.
foreach ($children as $key => $child) {
unset($elements[$key]);
$elements[$key] = $child;
}
$elements['#sorted'] = TRUE;
}
return array_keys($children);
}
/** * Return the visibile children of an element.
*
* @param $elements
* The parent element.
* @return
* The array keys of the element's visible children.
*/
function element_get_visible_children(array $elements) {
$visible_children = array();
foreach (element_children($elements) as $key) {
$child = $elements[$key];
// Skip un-accessible children.
if (isset($child['#access']) && !$child['#access']) {
continue;
}
// Skip value and hidden elements, since they are not rendered.
if (isset($child['#type']) && in_array($child['#type'], array('value', 'hidden'))) {
continue;
}
$visible_children[$key] = $child;
}
return array_keys($visible_children);
}
/**
* Sets HTML attributes based on element properties.
*
* @param $element
* The renderable element to process.
* @param $map
* An associative array whose keys are element property names and whose values
* are the HTML attribute names to set for corresponding the property; e.g.,
* array('#propertyname' => 'attributename'). If both names are identical
* except for the leading '#', then an attribute name value is sufficient and
* no property name needs to be specified.
*/
function element_set_attributes(array &$element, array $map) {
foreach ($map as $property => $attribute) {
// If the key is numeric, the attribute name needs to be taken over.
if (is_int($property)) {
$property = '#' . $attribute;
}
// Do not overwrite already existing attributes.
if (isset($element[$property]) && !isset($element['#attributes'][$attribute])) {
$element['#attributes'][$attribute] = $element[$property];
}
}
}
/**
* Sets a value in a nested array with variable depth.
*
* This helper function should be used when the depth of the array element you
* are changing may vary (that is, the number of parent keys is variable). It
* is primarily used for form structures and renderable arrays.
*
* Example:
* @code
* // Assume you have a 'signature' element somewhere in a form. It might be:
* $form['signature_settings']['signature'] = array(
* '#type' => 'text_format',
* '#title' => t('Signature'),
* );
* // Or, it might be further nested:
* $form['signature_settings']['user']['signature'] = array( * '#type' => 'text_format',
* '#title' => t('Signature'),
* );
* @endcode
*
* To deal with the situation, the code needs to figure out the route to the
* element, given an array of parents that is either
* @code array('signature_settings', 'signature') @endcode in the first case or
* @code array('signature_settings', 'user', 'signature') @endcode in the second
* case.
*
* Without this helper function the only way to set the signature element in one
* line would be using eval(), which should be avoided:
* @code
* // Do not do this! Avoid eval().
* eval('$form[\'' . implode("']['", $parents) . '\'] = $element;');
* @endcode
*
* Instead, use this helper function:
* @code
* drupal_array_set_nested_value($form, $parents, $element);
* @endcode
*
* However if the number of array parent keys is static, the value should always
* be set directly rather than calling this function. For instance, for the
* first example we could just do:
* @code
* $form['signature_settings']['signature'] = $element;
* @endcode
*
* @param $array
* A reference to the array to modify.
* @param $parents
* An array of parent keys, starting with the outermost key.
* @param $value
* The value to set.
* @param $force
* (Optional) If TRUE, the value is forced into the structure even if it
* requires the deletion of an already existing non-array parent value. If
* FALSE, PHP throws an error if trying to add into a value that is not an
* array. Defaults to FALSE.
*
* @see drupal_array_get_nested_value()
*/
function drupal_array_set_nested_value(array &$array, array $parents, $value, $force = FALSE) {
$ref = &$array;
foreach ($parents as $parent) {
// PHP auto-creates container arrays and NULL entries without error if $ref
// is NULL, but throws an error if $ref is set, but not an array.
if ($force && isset($ref) && !is_array($ref)) {
$ref = array();
}
$ref = &$ref[$parent];
}
$ref = $value;
}
/**
* Retrieves a value from a nested array with variable depth.
*
* This helper function should be used when the depth of the array element being
* retrieved may vary (that is, the number of parent keys is variable). It is
* primarily used for form structures and renderable arrays.
*
* Without this helper function the only way to get a nested array value with
* variable depth in one line would be using eval(), which should be avoided:
* @code
* // Do not do this! Avoid eval().
* // May also throw a PHP notice, if the variable array keys do not exist.
* eval('$value = $array[\'' . implode("']['", $parents) . "'];"); * @endcode
*
* Instead, use this helper function:
* @code
* $value = drupal_array_get_nested_value($form, $parents);
* @endcode
*
* The return value will be NULL, regardless of whether the actual value is NULL
* or whether the requested key does not exist. If it is required to know
* whether the nested array key actually exists, pass a third argument that is
* altered by reference:
* @code
* $key_exists = NULL;
* $value = drupal_array_get_nested_value($form, $parents, $key_exists);
* if ($key_exists) {
* // ... do something with $value ...
* }
* @endcode
*
* However if the number of array parent keys is static, the value should always
* be retrieved directly rather than calling this function. For instance:
* @code
* $value = $form['signature_settings']['signature'];
* @endcode
*
* @param $array
* The array from which to get the value.
* @param $parents
* An array of parent keys of the value, starting with the outermost key.
* @param $key_exists
* (optional) If given, an already defined variable that is altered by
* reference.
*
* @return
* The requested nested value. Possibly NULL if the value is NULL or not all
* nested parent keys exist. $key_exists is altered by reference and is a
* Boolean that indicates whether all nested parent keys exist (TRUE) or not
* (FALSE). This allows to distinguish between the two possibilities when NULL
* is returned.
*
* @see drupal_array_set_nested_value()
*/
function drupal_array_get_nested_value(array &$array, array $parents, &$key_exists = NULL) {
$ref = &$array;
foreach ($parents as $parent) {
if (is_array($ref) && array_key_exists($parent, $ref)) {
$ref = &$ref[$parent];
}
else {
$key_exists = FALSE;
return NULL;
}
}
$key_exists = TRUE;
return $ref;
}
/**
* Determines whether a nested array with variable depth contains all of the requested keys.
*
* This helper function should be used when the depth of the array element to be
* checked may vary (that is, the number of parent keys is variable). See
* drupal_array_set_nested_value() for details. It is primarily used for form
* structures and renderable arrays.
*
* If it is required to also get the value of the checked nested key, use
* drupal_array_get_nested_value() instead.
*
* If the number of array parent keys is static, this helper function is
* unnecessary and the following code can be used instead: * @code
* $value_exists = isset($form['signature_settings']['signature']);
* $key_exists = array_key_exists('signature', $form['signature_settings']);
* @endcode
*
* @param $array
* The array with the value to check for.
* @param $parents
* An array of parent keys of the value, starting with the outermost key.
*
* @return
* TRUE if all the parent keys exist, FALSE otherwise.
*
* @see drupal_array_get_nested_value()
*/
function drupal_array_nested_key_exists(array $array, array $parents) {
// Although this function is similar to PHP's array_key_exists(), its
// arguments should be consistent with drupal_array_get_nested_value().
$key_exists = NULL;
drupal_array_get_nested_value($array, $parents, $key_exists);
return $key_exists;
}
/**
* Provide theme registration for themes across .inc files.
*/
function drupal_common_theme() {
return array(
// theme.inc
'html' => array(
'render element' => 'page',
'template' => 'html',
),
'page' => array(
'render element' => 'page',
'template' => 'page',
),
'region' => array(
'render element' => 'elements',
'template' => 'region',
),
'status_messages' => array(
'variables' => array('display' => NULL),
),
'link' => array(
'variables' => array('text' => NULL, 'path' => NULL, 'options' => array()),
),
'links' => array(
'variables' => array('links' => NULL, 'attributes' => array('class' => array('links')), 'heading' => array()),
),
'image' => array(
// HTML 4 and XHTML 1.0 always require an alt attribute. The HTML 5 draft
// allows the alt attribute to be omitted in some cases. Therefore,
// default the alt attribute to an empty string, but allow code calling
// theme('image') to pass explicit NULL for it to be omitted. Usually,
// neither omission nor an empty string satisfies accessibility
// requirements, so it is strongly encouraged for code calling
// theme('image') to pass a meaningful value for the alt variable.
// - http://www.w3.org/TR/REC-html40/struct/objects.html#h-13.8
// - http://www.w3.org/TR/xhtml1/dtds.html
// - http://dev.w3.org/html5/spec/Overview.html#alt
// The title attribute is optional in all cases, so it is omitted by
// default.
'variables' => array('path' => NULL, 'width' => NULL, 'height' => NULL, 'alt' => '', 'title' => NULL, 'attributes' => array()),
),
'breadcrumb' => array(
'variables' => array('breadcrumb' => NULL),
),
'help' => array(
'variables' => array(), ),
'table' => array(
'variables' => array('header' => NULL, 'rows' => NULL, 'attributes' => array(), 'caption' => NULL, 'colgroups' => array(), 'sticky' => TRUE, 'empty' => ''),
),
'tablesort_indicator' => array(
'variables' => array('style' => NULL),
),
'mark' => array(
'variables' => array('type' => MARK_NEW),
),
'item_list' => array(
'variables' => array('items' => array(), 'title' => NULL, 'type' => 'ul', 'attributes' => array()),
),
'more_help_link' => array(
'variables' => array('url' => NULL),
),
'feed_icon' => array(
'variables' => array('url' => NULL, 'title' => NULL),
),
'more_link' => array(
'variables' => array('url' => NULL, 'title' => NULL)
),
'username' => array(
'variables' => array('account' => NULL),
),
'progress_bar' => array(
'variables' => array('percent' => NULL, 'message' => NULL),
),
'indentation' => array(
'variables' => array('size' => 1),
),
'html_tag' => array(
'render element' => 'element',
),
// from theme.maintenance.inc
'maintenance_page' => array(
'variables' => array('content' => NULL, 'show_messages' => TRUE),
'template' => 'maintenance-page',
),
'update_page' => array(
'variables' => array('content' => NULL, 'show_messages' => TRUE),
),
'install_page' => array(
'variables' => array('content' => NULL),
),
'task_list' => array(
'variables' => array('items' => NULL, 'active' => NULL),
),
'authorize_message' => array(
'variables' => array('message' => NULL, 'success' => TRUE),
),
'authorize_report' => array(
'variables' => array('messages' => array()),
),
// from pager.inc
'pager' => array(
'variables' => array('tags' => array(), 'element' => 0, 'parameters' => array(), 'quantity' => 9),
),
'pager_first' => array(
'variables' => array('text' => NULL, 'element' => 0, 'parameters' => array()),
),
'pager_previous' => array(
'variables' => array('text' => NULL, 'element' => 0, 'interval' => 1, 'parameters' => array()),
),
'pager_next' => array(
'variables' => array('text' => NULL, 'element' => 0, 'interval' => 1, 'parameters' => array()),
),
'pager_last' => array(
'variables' => array('text' => NULL, 'element' => 0, 'parameters' => array()),
), 'pager_link' => array(
'variables' => array('text' => NULL, 'page_new' => NULL, 'element' => NULL, 'parameters' => array(), 'attributes' => array()),
),
// from menu.inc
'menu_link' => array(
'render element' => 'element',
),
'menu_tree' => array(
'render element' => 'tree',
),
'menu_local_task' => array(
'render element' => 'element',
),
'menu_local_action' => array(
'render element' => 'element',
),
'menu_local_tasks' => array(
'variables' => array('primary' => array(), 'secondary' => array()),
),
// from form.inc
'select' => array(
'render element' => 'element',
),
'fieldset' => array(
'render element' => 'element',
),
'radio' => array(
'render element' => 'element',
),
'radios' => array(
'render element' => 'element',
),
'date' => array(
'render element' => 'element',
),
'exposed_filters' => array(
'render element' => 'form',
),
'checkbox' => array(
'render element' => 'element',
),
'checkboxes' => array(
'render element' => 'element',
),
'button' => array(
'render element' => 'element',
),
'image_button' => array(
'render element' => 'element',
),
'hidden' => array(
'render element' => 'element',
),
'textfield' => array(
'render element' => 'element',
),
'form' => array(
'render element' => 'element',
),
'textarea' => array(
'render element' => 'element',
),
'password' => array(
'render element' => 'element',
),
'file' => array(
'render element' => 'element',
),
'tableselect' => array(
'render element' => 'element', ),
'form_element' => array(
'render element' => 'element',
),
'form_required_marker' => array(
'render element' => 'element',
),
'form_element_label' => array(
'render element' => 'element',
),
'vertical_tabs' => array(
'render element' => 'element',
),
'container' => array(
'render element' => 'element',
),
);
}
/**
* @ingroup schemaapi
* @{
*/
/**
* Creates all tables in a module's hook_schema() implementation.
*
* Note: This function does not pass the module's schema through
* hook_schema_alter(). The module's tables will be created exactly as the
* module defines them.
*
* @param $module
* The module for which the tables will be created.
*/
function drupal_install_schema($module) {
$schema = drupal_get_schema_unprocessed($module);
_drupal_schema_initialize($schema, $module, FALSE);
foreach ($schema as $name => $table) {
db_create_table($name, $table);
}
}
/**
* Remove all tables that a module defines in its hook_schema().
*
* Note: This function does not pass the module's schema through
* hook_schema_alter(). The module's tables will be created exactly as the
* module defines them.
*
* @param $module
* The module for which the tables will be removed.
* @return
* An array of arrays with the following key/value pairs:
* - success: a boolean indicating whether the query succeeded.
* - query: the SQL query(s) executed, passed through check_plain().
*/
function drupal_uninstall_schema($module) {
$schema = drupal_get_schema_unprocessed($module);
_drupal_schema_initialize($schema, $module, FALSE);
foreach ($schema as $table) {
if (db_table_exists($table['name'])) {
db_drop_table($table['name']);
}
}
}
/**
* Returns the unprocessed and unaltered version of a module's schema. *
* Use this function only if you explicitly need the original
* specification of a schema, as it was defined in a module's
* hook_schema(). No additional default values will be set,
* hook_schema_alter() is not invoked and these unprocessed
* definitions won't be cached.
*
* This function can be used to retrieve a schema specification in
* hook_schema(), so it allows you to derive your tables from existing
* specifications.
*
* It is also used by drupal_install_schema() and
* drupal_uninstall_schema() to ensure that a module's tables are
* created exactly as specified without any changes introduced by a
* module that implements hook_schema_alter().
*
* @param $module
* The module to which the table belongs.
* @param $table
* The name of the table. If not given, the module's complete schema
* is returned.
*/
function drupal_get_schema_unprocessed($module, $table = NULL) {
// Load the .install file to get hook_schema.
module_load_install($module);
$schema = module_invoke($module, 'schema');
if (isset($table) && isset($schema[$table])) {
return $schema[$table];
}
elseif (!empty($schema)) {
return $schema;
}
return array();
}
/**
* Fill in required default values for table definitions returned by hook_schema().
*
* @param $schema
* The schema definition array as it was returned by the module's
* hook_schema().
* @param $module
* The module for which hook_schema() was invoked.
* @param $remove_descriptions
* (optional) Whether to additionally remove 'description' keys of all tables
* and fields to improve performance of serialize() and unserialize().
* Defaults to TRUE.
*/
function _drupal_schema_initialize(&$schema, $module, $remove_descriptions = TRUE) {
// Set the name and module key for all tables.
foreach ($schema as $name => &$table) {
if (empty($table['module'])) {
$table['module'] = $module;
}
if (!isset($table['name'])) {
$table['name'] = $name;
}
if ($remove_descriptions) {
unset($table['description']);
foreach ($table['fields'] as &$field) {
unset($field['description']);
}
}
}
}
/**
* Retrieve a list of fields from a table schema. The list is suitable for use in a SQL query.
* * @param $table
* The name of the table from which to retrieve fields.
* @param
* An optional prefix to to all fields.
*
* @return An array of fields.
**/
function drupal_schema_fields_sql($table, $prefix = NULL) {
$schema = drupal_get_schema($table);
$fields = array_keys($schema['fields']);
if ($prefix) {
$columns = array();
foreach ($fields as $field) {
$columns[] = "$prefix.$field";
}
return $columns;
}
else {
return $fields;
}
}
/**
* Saves (inserts or updates) a record to the database based upon the schema.
*
* @param $table
* The name of the table; this must be defined by a hook_schema()
* implementation.
* @param $record
* An object or array representing the record to write, passed in by
* reference. If inserting a new record, values not provided in $record will
* be populated in $record and in the database with the default values from
* the schema, as well as a single serial (auto-increment) field (if present).
* If updating an existing record, only provided values are updated in the
* database, and $record is not modified.
* @param $primary_keys
* To indicate that this is a new record to be inserted, omit this argument.
* If this is an update, this argument specifies the primary keys' field
* names. If there is only 1 field in the key, you may pass in a string; if
* there are multiple fields in the key, pass in an array.
*
* @return
* If the record insert or update failed, returns FALSE. If it succeeded,
* returns SAVED_NEW or SAVED_UPDATED, depending on the operation performed.
*/
function drupal_write_record($table, &$record, $primary_keys = array()) {
// Standardize $primary_keys to an array.
if (is_string($primary_keys)) {
$primary_keys = array($primary_keys);
}
$schema = drupal_get_schema($table);
if (empty($schema)) {
return FALSE;
}
$object = (object) $record;
$fields = array();
// Go through the schema to determine fields to write.
foreach ($schema['fields'] as $field => $info) {
if ($info['type'] == 'serial') {
// Skip serial types if we are updating.
if (!empty($primary_keys)) {
continue;
}
// Track serial field so we can helpfully populate them after the query.
// NOTE: Each table should come with one serial field only.
$serial = $field;
}
// Skip field if it is in $primary_keys as it is unnecessary to update a
// field to the value it is already set to.
if (in_array($field, $primary_keys)) {
continue;
}
if (!property_exists($object, $field)) {
// Skip fields that are not provided, default values are already known
// by the database.
continue;
}
// Build array of fields to update or insert.
if (empty($info['serialize'])) {
$fields[$field] = $object->$field;
}
else {
$fields[$field] = serialize($object->$field);
}
// Type cast to proper datatype, except when the value is NULL and the
// column allows this.
//
// MySQL PDO silently casts e.g. FALSE and '' to 0 when inserting the value
// into an integer column, but PostgreSQL PDO does not. Also type cast NULL
// when the column does not allow this.
if (isset($object->$field) || !empty($info['not null'])) {
if ($info['type'] == 'int' || $info['type'] == 'serial') {
$fields[$field] = (int) $fields[$field];
}
elseif ($info['type'] == 'float') {
$fields[$field] = (float) $fields[$field];
}
else {
$fields[$field] = (string) $fields[$field];
}
}
}
if (empty($fields)) {
return;
}
// Build the SQL.
if (empty($primary_keys)) {
// We are doing an insert.
$options = array('return' => Database::RETURN_INSERT_ID);
if (isset($serial) && isset($fields[$serial])) {
// If the serial column has been explicitly set with an ID, then we don't
// require the database to return the last insert id.
if ($fields[$serial]) {
$options['return'] = Database::RETURN_AFFECTED;
}
// If a serial column does exist with no value (i.e. 0) then remove it as
// the database will insert the correct value for us.
else {
unset($fields[$serial]);
}
}
$query = db_insert($table, $options)->fields($fields);
$return = SAVED_NEW;
}
else {
$query = db_update($table)->fields($fields);
foreach ($primary_keys as $key) {
$query->condition($key, $object->$key);
}
$return = SAVED_UPDATED;
}
// Execute the SQL.
if ($query_return = $query->execute()) {
if (isset($serial)) {
// If the database was not told to return the last insert id, it will be
// because we already know it.
if (isset($options) && $options['return'] != Database::RETURN_INSERT_ID) {
$object->$serial = $fields[$serial];
}
else {
$object->$serial = $query_return;
}
}
}
// If we have a single-field primary key but got no insert ID, the
// query failed. Note that we explicitly check for FALSE, because
// a valid update query which doesn't change any values will return
// zero (0) affected rows.
elseif ($query_return === FALSE && count($primary_keys) == 1) {
$return = FALSE;
}
// If we are inserting, populate empty fields with default values.
if (empty($primary_keys)) {
foreach ($schema['fields'] as $field => $info) {
if (isset($info['default']) && !property_exists($object, $field)) {
$object->$field = $info['default'];
}
}
}
// If we began with an array, convert back.
if (is_array($record)) {
$record = (array) $object;
}
return $return;
}
/**
* @} End of "ingroup schemaapi".
*/
/**
* Parses Drupal module and theme .info files.
*
* Info files are NOT for placing arbitrary theme and module-specific settings.
* Use variable_get() and variable_set() for that.
*
* Information stored in a module .info file:
* - name: The real name of the module for display purposes.
* - description: A brief description of the module.
* - dependencies: An array of shortnames of other modules this module requires.
* - package: The name of the package of modules this module belongs to.
*
* See forum.info for an example of a module .info file.
*
* Information stored in a theme .info file:
* - name: The real name of the theme for display purposes.
* - description: Brief description.
* - screenshot: Path to screenshot relative to the theme's .info file.
* - engine: Theme engine; typically phptemplate.
* - base: Name of a base theme, if applicable; e.g., base = zen.
* - regions: Listed regions; e.g., region[left] = Left sidebar.
* - features: Features available; e.g., features[] = logo.
* - stylesheets: Theme stylesheets; e.g., stylesheets[all][] = my-style.css.
* - scripts: Theme scripts; e.g., scripts[] = my-script.js.
*
* See bartik.info for an example of a theme .info file.
* * @param $filename
* The file we are parsing. Accepts file with relative or absolute path.
*
* @return
* The info array.
*
* @see drupal_parse_info_format()
*/
function drupal_parse_info_file($filename) {
$info = &drupal_static(__FUNCTION__, array());
if (!isset($info[$filename])) {
if (!file_exists($filename)) {
$info[$filename] = array();
}
else {
$data = file_get_contents($filename);
$info[$filename] = drupal_parse_info_format($data);
}
}
return $info[$filename];
}
/**
* Parse data in Drupal's .info format.
*
* Data should be in an .ini-like format to specify values. White-space
* generally doesn't matter, except inside values:
* @code
* key = value
* key = "value"
* key = 'value'
* key = "multi-line
* value"
* key = 'multi-line
* value'
* key
* =
* 'value'
* @endcode
*
* Arrays are created using a HTTP GET alike syntax:
* @code
* key[] = "numeric array"
* key[index] = "associative array"
* key[index][] = "nested numeric array"
* key[index][index] = "nested associative array"
* @endcode
*
* PHP constants are substituted in, but only when used as the entire value.
* Comments should start with a semi-colon at the beginning of a line.
*
* @param $data
* A string to parse.
* @return
* The info array.
*
* @see drupal_parse_info_file()
*/
function drupal_parse_info_format($data) {
$info = array();
$constants = get_defined_constants();
if (preg_match_all('
@^\s* # Start at the beginning of a line, ignoring leading whitespace
((?:
[^=;\[\]]| # Key names cannot contain equal signs, semi-colons or square brackets,
\[[^\[\]]*\] # unless they are balanced and not nested
)+?)
\s*=\s* # Key/value pairs are separated by equal signs (ignoring white-space) (?:
("(?:[^"]|(?<=\\\\)")*")| # Double-quoted string, which may contain slash-escaped quotes/slashes
(\'(?:[^\']|(?<=\\\\)\')*\')| # Single-quoted string, which may contain slash-escaped quotes/slashes
([^\r\n]*?) # Non-quoted string
)\s*$ # Stop at the next end of a line, ignoring trailing whitespace
@msx', $data, $matches, PREG_SET_ORDER)) {
foreach ($matches as $match) {
// Fetch the key and value string
$i = 0;
foreach (array('key', 'value1', 'value2', 'value3') as $var) {
$$var = isset($match[++$i]) ? $match[$i] : '';
}
$value = stripslashes(substr($value1, 1, -1)) . stripslashes(substr($value2, 1, -1)) . $value3;
// Parse array syntax
$keys = preg_split('/\]?\[/', rtrim($key, ']'));
$last = array_pop($keys);
$parent = &$info;
// Create nested arrays
foreach ($keys as $key) {
if ($key == '') {
$key = count($parent);
}
if (!isset($parent[$key]) || !is_array($parent[$key])) {
$parent[$key] = array();
}
$parent = &$parent[$key];
}
// Handle PHP constants.
if (isset($constants[$value])) {
$value = $constants[$value];
}
// Insert actual value
if ($last == '') {
$last = count($parent);
}
$parent[$last] = $value;
}
}
return $info;
}
/**
* Severity levels, as defined in RFC 3164: http://www.ietf.org/rfc/rfc3164.txt.
*
* @return
* Array of the possible severity levels for log messages.
*
* @see watchdog()
* @ingroup logging_severity_levels
*/
function watchdog_severity_levels() {
return array(
WATCHDOG_EMERGENCY => t('emergency'),
WATCHDOG_ALERT => t('alert'),
WATCHDOG_CRITICAL => t('critical'),
WATCHDOG_ERROR => t('error'),
WATCHDOG_WARNING => t('warning'),
WATCHDOG_NOTICE => t('notice'),
WATCHDOG_INFO => t('info'),
WATCHDOG_DEBUG => t('debug'),
);
}
/** * Explode a string of given tags into an array.
*
* @see drupal_implode_tags()
*/
function drupal_explode_tags($tags) {
// This regexp allows the following types of user input:
// this, "somecompany, llc", "and ""this"" w,o.rks", foo bar
$regexp = '%(?:^|,\ *)("(?>[^"]*)(?>""[^"]* )*"|(?: [^",]*))%x';
preg_match_all($regexp, $tags, $matches);
$typed_tags = array_unique($matches[1]);
$tags = array();
foreach ($typed_tags as $tag) {
// If a user has escaped a term (to demonstrate that it is a group,
// or includes a comma or quote character), we remove the escape
// formatting so to save the term into the database as the user intends.
$tag = trim(str_replace('""', '"', preg_replace('/^"(.*)"$/', '\1', $tag)));
if ($tag != "") {
$tags[] = $tag;
}
}
return $tags;
}
/**
* Implode an array of tags into a string.
*
* @see drupal_explode_tags()
*/
function drupal_implode_tags($tags) {
$encoded_tags = array();
foreach ($tags as $tag) {
// Commas and quotes in tag names are special cases, so encode them.
if (strpos($tag, ',') !== FALSE || strpos($tag, '"') !== FALSE) {
$tag = '"' . str_replace('"', '""', $tag) . '"';
}
$encoded_tags[] = $tag;
}
return implode(', ', $encoded_tags);
}
/**
* Flush all cached data on the site.
*
* Empties cache tables, rebuilds the menu cache and theme registries, and
* invokes a hook so that other modules' cache data can be cleared as well.
*/
function drupal_flush_all_caches() {
// Change query-strings on css/js files to enforce reload for all users.
_drupal_flush_css_js();
registry_rebuild();
drupal_clear_css_cache();
drupal_clear_js_cache();
// Rebuild the theme data. Note that the module data is rebuilt above, as
// part of registry_rebuild().
system_rebuild_theme_data();
drupal_theme_rebuild();
node_types_rebuild();
// node_menu() defines menu items based on node types so it needs to come
// after node types are rebuilt.
menu_rebuild();
// Synchronize to catch any actions that were added or removed.
actions_synchronize();
// Don't clear cache_form - in-progress form submissions may break.
// Ordered so clearing the page cache will always be the last action.
$core = array('cache', 'cache_filter', 'cache_bootstrap', 'cache_page');
$cache_tables = array_merge(module_invoke_all('flush_caches'), $core);
foreach ($cache_tables as $table) {
cache_clear_all('*', $table, TRUE);
}
// Rebuild the bootstrap module list. We do this here so that developers
// can get new hook_boot() implementations registered without having to
// write a hook_update_N() function.
_system_update_bootstrap_status();
}
/**
* Helper function to change query-strings on css/js files.
*
* Changes the character added to all css/js files as dummy query-string, so
* that all browsers are forced to reload fresh files.
*/
function _drupal_flush_css_js() {
// The timestamp is converted to base 36 in order to make it more compact.
variable_set('css_js_query_string', base_convert(REQUEST_TIME, 10, 36));
}
/**
* Debug function used for outputting debug information.
*
* The debug information is passed on to trigger_error() after being converted
* to a string using _drupal_debug_message().
*
* @param $data
* Data to be output.
* @param $label
* Label to prefix the data.
* @param $print_r
* Flag to switch between print_r() and var_export() for data conversion to
* string. Set $print_r to TRUE when dealing with a recursive data structure
* as var_export() will generate an error.
*/
function debug($data, $label = NULL, $print_r = FALSE) {
// Print $data contents to string.
$string = check_plain($print_r ? print_r($data, TRUE) : var_export($data, TRUE));
// Display values with pre-formatting to increase readability.
$string = '<pre>' . $string . '</pre>';
trigger_error(trim($label ? "$label: $string" : $string));
}
/**
* Parse a dependency for comparison by drupal_check_incompatibility().
*
* @param $dependency
* A dependency string, for example 'foo (>=8.x-4.5-beta5, 3.x)'.
* @return
* An associative array with three keys:
* - 'name' includes the name of the thing to depend on (e.g. 'foo').
* - 'original_version' contains the original version string (which can be
* used in the UI for reporting incompatibilities).
* - 'versions' is a list of associative arrays, each containing the keys
* 'op' and 'version'. 'op' can be one of: '=', '==', '!=', '<>', '<',
* '<=', '>', or '>='. 'version' is one piece like '4.5-beta3'.
* Callers should pass this structure to drupal_check_incompatibility().
*
* @see drupal_check_incompatibility()
*/
function drupal_parse_dependency($dependency) {
// We use named subpatterns and support every op that version_compare
// supports. Also, op is optional and defaults to equals. $p_op = '(?P<operation>!=|==|=|<|<=|>|>=|<>)?';
// Core version is always optional: 8.x-2.x and 2.x is treated the same.
$p_core = '(?:' . preg_quote(DRUPAL_CORE_COMPATIBILITY) . '-)?';
$p_major = '(?P<major>\d+)';
// By setting the minor version to x, branches can be matched.
$p_minor = '(?P<minor>(?:\d+|x)(?:-[A-Za-z]+\d+)?)';
$value = array();
$parts = explode('(', $dependency, 2);
$value['name'] = trim($parts[0]);
if (isset($parts[1])) {
$value['original_version'] = ' (' . $parts[1];
foreach (explode(',', $parts[1]) as $version) {
if (preg_match("/^\s*$p_op\s*$p_core$p_major\.$p_minor/", $version, $matches)) {
$op = !empty($matches['operation']) ? $matches['operation'] : '=';
if ($matches['minor'] == 'x') {
// Drupal considers "2.x" to mean any version that begins with
// "2" (e.g. 2.0, 2.9 are all "2.x"). PHP's version_compare(),
// on the other hand, treats "x" as a string; so to
// version_compare(), "2.x" is considered less than 2.0. This
// means that >=2.x and <2.x are handled by version_compare()
// as we need, but > and <= are not.
if ($op == '>' || $op == '<=') {
$matches['major']++;
}
// Equivalence can be checked by adding two restrictions.
if ($op == '=' || $op == '==') {
$value['versions'][] = array('op' => '<', 'version' => ($matches['major'] + 1) . '.x');
$op = '>=';
}
}
$value['versions'][] = array('op' => $op, 'version' => $matches['major'] . '.' . $matches['minor']);
}
}
}
return $value;
}
/**
* Check whether a version is compatible with a given dependency.
*
* @param $v
* The parsed dependency structure from drupal_parse_dependency().
* @param $current_version
* The version to check against (like 4.2).
* @return
* NULL if compatible, otherwise the original dependency version string that
* caused the incompatibility.
*
* @see drupal_parse_dependency()
*/
function drupal_check_incompatibility($v, $current_version) {
if (!empty($v['versions'])) {
foreach ($v['versions'] as $required_version) {
if ((isset($required_version['op']) && !version_compare($current_version, $required_version['version'], $required_version['op']))) {
return $v['original_version'];
}
}
}
}
/**
* Get the entity info array of an entity type.
*
* @see hook_entity_info()
* @see hook_entity_info_alter()
*
* @param $entity_type
* The entity type, e.g. node, for which the info shall be returned, or NULL
* to return an array with info about all types.
*/function entity_get_info($entity_type = NULL) {
global $language;
// Use the advanced drupal_static() pattern, since this is called very often.
static $drupal_static_fast;
if (!isset($drupal_static_fast)) {
$drupal_static_fast['entity_info'] = &drupal_static(__FUNCTION__);
}
$entity_info = &$drupal_static_fast['entity_info'];
// hook_entity_info() includes translated strings, so each language is cached
// separately.
$langcode = $language->language;
if (empty($entity_info)) {
if ($cache = cache_get("entity_info:$langcode")) {
$entity_info = $cache->data;
}
else {
$entity_info = module_invoke_all('entity_info');
// Merge in default values.
foreach ($entity_info as $name => $data) {
$entity_info[$name] += array(
'fieldable' => FALSE,
'controller class' => 'DrupalDefaultEntityController',
'static cache' => TRUE,
'field cache' => TRUE,
'load hook' => $name . '_load',
'bundles' => array(),
'view modes' => array(),
'entity keys' => array(),
'translation' => array(),
);
$entity_info[$name]['entity keys'] += array(
'revision' => '',
'bundle' => '',
);
foreach ($entity_info[$name]['view modes'] as $view_mode => $view_mode_info) {
$entity_info[$name]['view modes'][$view_mode] += array(
'custom settings' => FALSE,
);
}
// If no bundle key is provided, assume a single bundle, named after
// the entity type.
if (empty($entity_info[$name]['entity keys']['bundle']) && empty($entity_info[$name]['bundles'])) {
$entity_info[$name]['bundles'] = array($name => array('label' => $entity_info[$name]['label']));
}
// Prepare entity schema fields SQL info for
// DrupalEntityControllerInterface::buildQuery().
if (isset($entity_info[$name]['base table'])) {
$entity_info[$name]['schema_fields_sql']['base table'] = drupal_schema_fields_sql($entity_info[$name]['base table']);
if (isset($entity_info[$name]['revision table'])) {
$entity_info[$name]['schema_fields_sql']['revision table'] = drupal_schema_fields_sql($entity_info[$name]['revision table']);
}
}
}
// Let other modules alter the entity info.
drupal_alter('entity_info', $entity_info);
cache_set("entity_info:$langcode", $entity_info);
}
}
if (empty($entity_type)) {
return $entity_info;
}
elseif (isset($entity_info[$entity_type])) {
return $entity_info[$entity_type];
}
}
/**
* Resets the cached information about entity types.
*/
function entity_info_cache_clear() {
drupal_static_reset('entity_get_info');
// Clear all languages.
cache_clear_all('entity_info:', 'cache', TRUE);
}
/**
* Helper function to extract id, vid, and bundle name from an entity.
*
* @param $entity_type
* The entity type; e.g. 'node' or 'user'.
* @param $entity
* The entity from which to extract values.
* @return
* A numerically indexed array (not a hash table) containing these
* elements:
* 0: primary id of the entity
* 1: revision id of the entity, or NULL if $entity_type is not versioned
* 2: bundle name of the entity
*/
function entity_extract_ids($entity_type, $entity) {
$info = entity_get_info($entity_type);
// Objects being created might not have id/vid yet.
$id = isset($entity->{$info['entity keys']['id']}) ? $entity->{$info['entity keys']['id']} : NULL;
$vid = ($info['entity keys']['revision'] && isset($entity->{$info['entity keys']['revision']})) ? $entity->{$info['entity keys']['revision']} : NULL;
// If no bundle key provided, then we assume a single bundle, named after the
// entity type.
$bundle = $info['entity keys']['bundle'] ? $entity->{$info['entity keys']['bundle']} : $entity_type;
return array($id, $vid, $bundle);
}
/**
* Helper function to assemble an object structure with initial ids.
*
* This function can be seen as reciprocal to entity_extract_ids().
*
* @param $entity_type
* The entity type; e.g. 'node' or 'user'.
* @param $ids
* A numerically indexed array, as returned by entity_extract_ids(),
* containing these elements:
* 0: primary id of the entity
* 1: revision id of the entity, or NULL if $entity_type is not versioned
* 2: bundle name of the entity, or NULL if $entity_type has no bundles
* @return
* An entity structure, initialized with the ids provided.
*/
function entity_create_stub_entity($entity_type, $ids) {
$entity = new stdClass();
$info = entity_get_info($entity_type);
$entity->{$info['entity keys']['id']} = $ids[0];
if (!empty($info['entity keys']['revision']) && isset($ids[1])) {
$entity->{$info['entity keys']['revision']} = $ids[1];
}
if (!empty($info['entity keys']['bundle']) && isset($ids[2])) {
$entity->{$info['entity keys']['bundle']} = $ids[2];
}
return $entity;
}
/**
* Load entities from the database.
*
* The entities are stored in a static memory cache, and will not require
* database access if loaded again during the same page request.
*
* The actual loading is done through a class that has to implement the * DrupalEntityControllerInterface interface. By default,
* DrupalDefaultEntityController is used. Entity types can specify that a
* different class should be used by setting the 'controller class' key in
* hook_entity_info(). These classes can either implement the
* DrupalEntityControllerInterface interface, or, most commonly, extend the
* DrupalDefaultEntityController class. See node_entity_info() and the
* NodeController in node.module as an example.
*
* @see hook_entity_info()
* @see DrupalEntityControllerInterface
* @see DrupalDefaultEntityController
* @see EntityFieldQuery
*
* @param $entity_type
* The entity type to load, e.g. node or user.
* @param $ids
* An array of entity IDs, or FALSE to load all entities.
* @param $conditions
* (deprecated) An associative array of conditions on the base table, where
* the keys are the database fields and the values are the values those
* fields must have. Instead, it is preferable to use EntityFieldQuery to
* retrieve a list of entity IDs loadable by this function.
* @param $reset
* Whether to reset the internal cache for the requested entity type.
*
* @return
* An array of entity objects indexed by their ids. When no results are
* found, an empty array is returned.
*
* @todo Remove $conditions in Drupal 8.
*/
function entity_load($entity_type, $ids = FALSE, $conditions = array(), $reset = FALSE) {
if ($reset) {
entity_get_controller($entity_type)->resetCache();
}
return entity_get_controller($entity_type)->load($ids, $conditions);
}
/**
* Loads the unchanged, i.e. not modified, entity from the database.
*
* Unlike entity_load() this function ensures the entity is directly loaded from
* the database, thus bypassing any static cache. In particular, this function
* is useful to determine changes by comparing the entity being saved to the
* stored entity.
*
* @param $entity_type
* The entity type to load, e.g. node or user.
* @param $id
* The id of the entity to load.
*
* @return
* The unchanged entity, or FALSE if the entity cannot be loaded.
*/
function entity_load_unchanged($entity_type, $id) {
entity_get_controller($entity_type)->resetCache(array($id));
$result = entity_get_controller($entity_type)->load(array($id));
return reset($result);
}
/**
* Get the entity controller class for an entity type.
*/
function entity_get_controller($entity_type) {
$controllers = &drupal_static(__FUNCTION__, array());
if (!isset($controllers[$entity_type])) {
$type_info = entity_get_info($entity_type);
$class = $type_info['controller class'];
$controllers[$entity_type] = new $class($entity_type);
} return $controllers[$entity_type];
}
/**
* Invoke hook_entity_prepare_view().
*
* If adding a new entity similar to nodes, comments or users, you should
* invoke this function during the ENTITY_build_content() or
* ENTITY_view_multiple() phases of rendering to allow other modules to alter
* the objects during this phase. This is needed for situations where
* information needs to be loaded outside of ENTITY_load() - particularly
* when loading entities into one another - i.e. a user object into a node, due
* to the potential for unwanted side-effects such as caching and infinite
* recursion. By convention, entity_prepare_view() is called after
* field_attach_prepare_view() to allow entity level hooks to act on content
* loaded by field API.
* @see hook_entity_prepare_view()
*
* @param $entity_type
* The type of entity, i.e. 'node', 'user'.
* @param $entities
* The entity objects which are being prepared for view, keyed by object ID.
* @param $langcode
* (optional) A language code to be used for rendering. Defaults to the global
* content language of the current request.
*/
function entity_prepare_view($entity_type, $entities, $langcode = NULL) {
if (!isset($langcode)) {
$langcode = $GLOBALS['language_content']->language;
}
// To ensure hooks are only run once per entity, check for an
// entity_view_prepared flag and only process items without it.
// @todo: resolve this more generally for both entity and field level hooks.
$prepare = array();
foreach ($entities as $id => $entity) {
if (empty($entity->entity_view_prepared)) {
// Add this entity to the items to be prepared.
$prepare[$id] = $entity;
// Mark this item as prepared.
$entity->entity_view_prepared = TRUE;
}
}
if (!empty($prepare)) {
module_invoke_all('entity_prepare_view', $prepare, $entity_type, $langcode);
}
}
/**
* Returns the uri elements of an entity.
*
* @param $entity_type
* The entity type; e.g. 'node' or 'user'.
* @param $entity
* The entity for which to generate a path.
* @return
* An array containing the 'path' and 'options' keys used to build the uri of
* the entity, and matching the signature of url(). NULL if the entity has no
* uri of its own.
*/
function entity_uri($entity_type, $entity) {
// This check enables the URI of an entity to be easily overridden from what
// the callback for the entity type or bundle would return, and it helps
// minimize performance overhead when entity_uri() is called multiple times
// for the same entity.
if (!isset($entity->uri)) {
$info = entity_get_info($entity_type);
list($id, $vid, $bundle) = entity_extract_ids($entity_type, $entity);
// A bundle-specific callback takes precedence over the generic one for the
// entity type.
if (isset($info['bundles'][$bundle]['uri callback'])) {
$uri_callback = $info['bundles'][$bundle]['uri callback'];
}
elseif (isset($info['uri callback'])) {
$uri_callback = $info['uri callback'];
}
else {
$uri_callback = NULL;
}
// Invoke the callback to get the URI. If there is no callback, set the
// entity's 'uri' property to FALSE to indicate that it is known to not have
// a URI.
if (isset($uri_callback) && function_exists($uri_callback)) {
$entity->uri = $uri_callback($entity);
if (!isset($entity->uri['options'])) {
$entity->uri['options'] = array();
}
// Pass the entity data to url() so that alter functions do not need to
// lookup this entity again.
$entity->uri['options']['entity_type'] = $entity_type;
$entity->uri['options']['entity'] = $entity;
}
else {
$entity->uri = FALSE;
}
}
return $entity->uri ? $entity->uri : NULL;
}
/**
* Returns the label of an entity.
*
* See the 'label callback' component of the hook_entity_info() return value
* for more information.
*
* @param $entity_type
* The entity type; e.g., 'node' or 'user'.
* @param $entity
* The entity for which to generate the label.
*
* @return
* The entity label, or FALSE if not found.
*/
function entity_label($entity_type, $entity) {
$label = FALSE;
$info = entity_get_info($entity_type);
if (isset($info['label callback']) && function_exists($info['label callback'])) {
$label = $info['label callback']($entity_type, $entity);
}
elseif (!empty($info['entity keys']['label']) && isset($entity->{$info['entity keys']['label']})) {
$label = $entity->{$info['entity keys']['label']};
}
return $label;
}
/**
* Helper function for attaching field API validation to entity forms.
*/
function entity_form_field_validate($entity_type, $form, &$form_state) {
// All field attach API functions act on an entity object, but during form
// validation, we don't have one. $form_state contains the entity as it was
// prior to processing the current form submission, and we must not update it
// until we have fully validated the submitted input. Therefore, for
// validation, act on a pseudo entity created out of the form values.
$pseudo_entity = (object) $form_state['values']; field_attach_form_validate($entity_type, $pseudo_entity, $form, $form_state);
}
/**
* Helper function for copying submitted values to entity properties for simple entity forms.
*
* During the submission handling of an entity form's "Save", "Preview", and
* possibly other buttons, the form state's entity needs to be updated with the
* submitted form values. Each entity form implements its own builder function
* for doing this, appropriate for the particular entity and form, whereas
* modules may specify additional builder functions in $form['#entity_builders']
* for copying the form values of added form elements to entity properties.
* Many of the main entity builder functions can call this helper function to
* re-use its logic of copying $form_state['values'][PROPERTY] values to
* $entity->PROPERTY for all entries in $form_state['values'] that are not field
* data, and calling field_attach_submit() to copy field data. Apart from that
* this helper invokes any additional builder functions that have been specified
* in $form['#entity_builders'].
*
* For some entity forms (e.g., forms with complex non-field data and forms that
* simultaneously edit multiple entities), this behavior may be inappropriate,
* so the builder function for such forms needs to implement the required
* functionality instead of calling this function.
*/
function entity_form_submit_build_entity($entity_type, $entity, $form, &$form_state) {
$info = entity_get_info($entity_type);
list(, , $bundle) = entity_extract_ids($entity_type, $entity);
// Copy top-level form values that are not for fields to entity properties,
// without changing existing entity properties that are not being edited by
// this form. Copying field values must be done using field_attach_submit().
$values_excluding_fields = $info['fieldable'] ? array_diff_key($form_state['values'], field_info_instances($entity_type, $bundle)) : $form_state['values'];
foreach ($values_excluding_fields as $key => $value) {
$entity->$key = $value;
}
// Invoke all specified builders for copying form values to entity properties.
if (isset($form['#entity_builders'])) {
foreach ($form['#entity_builders'] as $function) {
$function($entity_type, $entity, $form, $form_state);
}
}
// Copy field values to the entity.
if ($info['fieldable']) {
field_attach_submit($entity_type, $entity, $form, $form_state);
}
}
/**
* Performs one or more XML-RPC request(s).
*
* Usage example:
* @code
* $result = xmlrpc('http://example.com/xmlrpc.php', array(
* 'service.methodName' => array($parameter, $second, $third),
* ));
* @endcode
*
* @param $url
* An absolute URL of the XML-RPC endpoint.
* @param $args
* An associative array whose keys are the methods to call and whose values
* are the arguments to pass to the respective method. If multiple methods
* are specified, a system.multicall is performed.
* @param $options
* (optional) An array of options to pass along to drupal_http_request().
*
* @return
* For one request: * Either the return value of the method on success, or FALSE.
* If FALSE is returned, see xmlrpc_errno() and xmlrpc_error_msg().
* For multiple requests:
* An array of results. Each result will either be the result
* returned by the method called, or an xmlrpc_error object if the call
* failed. See xmlrpc_error().
*/
function xmlrpc($url, $args, $options = array()) {
require_once DRUPAL_ROOT . '/includes/xmlrpc.inc';
return _xmlrpc($url, $args, $options);
}
/**
* Retrieves a list of all available archivers.
*
* @see hook_archiver_info()
* @see hook_archiver_info_alter()
*/
function archiver_get_info() {
$archiver_info = &drupal_static(__FUNCTION__, array());
if (empty($archiver_info)) {
$cache = cache_get('archiver_info');
if ($cache === FALSE) {
// Rebuild the cache and save it.
$archiver_info = module_invoke_all('archiver_info');
drupal_alter('archiver_info', $archiver_info);
uasort($archiver_info, 'drupal_sort_weight');
cache_set('archiver_info', $archiver_info);
}
else {
$archiver_info = $cache->data;
}
}
return $archiver_info;
}
/**
* Returns a string of supported archive extensions.
*
* @return
* A space-separated string of extensions suitable for use by the file
* validation system.
*/
function archiver_get_extensions() {
$valid_extensions = array();
foreach (archiver_get_info() as $archive) {
foreach ($archive['extensions'] as $extension) {
foreach (explode('.', $extension) as $part) {
if (!in_array($part, $valid_extensions)) {
$valid_extensions[] = $part;
}
}
}
}
return implode(' ', $valid_extensions);
}
/**
* Create the appropriate archiver for the specified file.
*
* @param $file
* The full path of the archive file. Note that stream wrapper
* paths are supported, but not remote ones.
* @return
* A newly created instance of the archiver class appropriate
* for the specified file, already bound to that file.
* If no appropriate archiver class was found, will return FALSE.
*/function archiver_get_archiver($file) {
// Archivers can only work on local paths
$filepath = drupal_realpath($file);
if (!is_file($filepath)) {
throw new Exception(t('Archivers can only operate on local files: %file not supported', array('%file' => $file)));
}
$archiver_info = archiver_get_info();
foreach ($archiver_info as $implementation) {
foreach ($implementation['extensions'] as $extension) {
// Because extensions may be multi-part, such as .tar.gz,
// we cannot use simpler approaches like substr() or pathinfo().
// This method isn't quite as clean but gets the job done.
// Also note that the file may not yet exist, so we cannot rely
// on fileinfo() or other disk-level utilities.
if (strrpos($filepath, '.' . $extension) === strlen($filepath) - strlen('.' . $extension)) {
return new $implementation['class']($filepath);
}
}
}
}
/**
* Drupal Updater registry.
*
* An Updater is a class that knows how to update various parts of the Drupal
* file system, for example to update modules that have newer releases, or to
* install a new theme.
*
* @return
* Returns the Drupal Updater class registry.
*
* @see hook_updater_info()
* @see hook_updater_info_alter()
*/
function drupal_get_updaters() {
$updaters = &drupal_static(__FUNCTION__);
if (!isset($updaters)) {
$updaters = module_invoke_all('updater_info');
drupal_alter('updater_info', $updaters);
uasort($updaters, 'drupal_sort_weight');
}
return $updaters;
}
/**
* Drupal FileTransfer registry.
*
* @return
* Returns the Drupal FileTransfer class registry.
*
* @see FileTransfer
* @see hook_filetransfer_info()
* @see hook_filetransfer_info_alter()
*/
function drupal_get_filetransfer_info() {
$info = &drupal_static(__FUNCTION__);
if (!isset($info)) {
// Since we have to manually set the 'file path' default for each
// module separately, we can't use module_invoke_all().
$info = array();
foreach (module_implements('filetransfer_info') as $module) {
$function = $module . '_filetransfer_info';
if (function_exists($function)) {
$result = $function();
if (isset($result) && is_array($result)) {
foreach ($result as &$values) {
if (empty($values['file path'])) {
$values['file path'] = drupal_get_path('module', $module);
} }
$info = array_merge_recursive($info, $result);
}
}
}
drupal_alter('filetransfer_info', $info);
uasort($info, 'drupal_sort_weight');
}
return $info;
}