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common.inc 101.45 KiB
<?php
// $Id$
/**
* @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.
*/
/**
* 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);
/**
* Set content for a specified region.
*
* @param $region
* Page region the content is assigned to.
*
* @param $data
* Content to be set.
*/
function drupal_set_content($region = NULL, $data = NULL) {
static $content = array();
if (!is_null($region) && !is_null($data)) {
$content[$region][] = $data;
}
return $content;
}
/**
* Get assigned content.
*
* @param $region
* A specified region to fetch content for. If NULL, all regions will be returned.
*
* @param $delimiter
* Content to be inserted between exploded array elements.
*/
function drupal_get_content($region = NULL, $delimiter = ' ') {
$content = drupal_set_content();
if (isset($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;
}
}
/**
* 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) {
static $stored_breadcrumb;
if (!is_null($breadcrumb)) {
$stored_breadcrumb = $breadcrumb;
}
return $stored_breadcrumb;
}
/**
* Get the breadcrumb trail for the current page.
*/
function drupal_get_breadcrumb() {
$breadcrumb = drupal_set_breadcrumb();
if (is_null($breadcrumb)) {
$breadcrumb = menu_get_active_breadcrumb();
}
return $breadcrumb;
}
/**
* Add output to the head tag of the HTML page.
* This function can be called as long the headers aren't sent.
*/
function drupal_set_html_head($data = NULL) {
static $stored_head = '';
if (!is_null($data)) {
$stored_head .= $data ."\n";
}
return $stored_head;
}
/**
* Retrieve output to be displayed in the head tag of the HTML page.
*/
function drupal_get_html_head() {
$output = "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n";
return $output . drupal_set_html_head();
}
/**
* Reset the static variable which holds the aliases mapped for this request.
*/
function drupal_clear_path_cache() {
drupal_lookup_path('wipe');
}
/**
* Set an HTTP response header for the current page.
*
* Note: when sending a Content-Type header, always include a 'charset' type
* too. This is necessary to avoid security bugs (e.g. UTF-7 XSS).
*/
function drupal_set_header($header = NULL) {
// We use an array to guarantee there are no leading or trailing delimiters.
// Otherwise, header('') could get called when serving the page later, which
// ends HTTP headers prematurely on some PHP versions.
static $stored_headers = array();
if (strlen($header)) { header($header);
$stored_headers[] = $header;
}
return implode("\n", $stored_headers);
}
/**
* Get the HTTP response headers for the current page.
*/
function drupal_get_headers() {
return drupal_set_header();
}
/**
* Add a feed URL for the current page.
*
* @param $url
* The url for the feed
* @param $title
* The title of the feed
*/
function drupal_add_feed($url = NULL, $title = '') {
static $stored_feed_links = array();
if (!is_null($url) && !isset($stored_feed_links[$url])) {
$stored_feed_links[$url] = theme('feed_icon', $url, $title);
drupal_add_link(array('rel' => 'alternate',
'type' => 'application/rss+xml',
'title' => $title,
'href' => $url));
}
return $stored_feed_links;
}
/**
* Get the feed URLs for the current page.
*
* @param $delimiter
* The delimiter to split feeds by
*/
function drupal_get_feeds($delimiter = "\n") {
$feeds = drupal_add_feed();
return implode($feeds, $delimiter);
}
/**
* @name HTTP handling
* @{
* Functions to properly handle HTTP responses.
*/
/**
* Parse an array into a valid urlencoded query string.
*
* @param $query
* The array to be processed e.g. $_GET
* @param $exclude
* The array filled with keys to be excluded. Use parent[child] to exclude nested items.
* @param $parent
* Should not be passed, only used in recursive calls
* @return
* urlencoded string which can be appended to/as the URL query string
*/
function drupal_query_string_encode($query, $exclude = array(), $parent = '') {
$params = array();
foreach ($query as $key => $value) {
$key = drupal_urlencode($key);
if ($parent) { $key = $parent .'['. $key .']';
}
if (in_array($key, $exclude)) {
continue;
}
if (is_array($value)) {
$params[] = drupal_query_string_encode($value, $exclude, $key);
}
else {
$params[] = $key .'='. drupal_urlencode($value);
}
}
return implode('&', $params);
}
/**
* Prepare a destination query string for use in combination with
* drupal_goto(). Used to direct the user back to the referring page
* after completing a form. By default the current URL is returned.
* If a destination exists in the previous request, that destination
* is returned. As such, a destination can persist across multiple
* pages.
*
* @see drupal_goto()
*/
function drupal_get_destination() {
if (isset($_REQUEST['destination'])) {
return 'destination='. urlencode($_REQUEST['destination']);
}
else {
// Use $_GET here to retrieve the original path in source form.
$path = isset($_GET['q']) ? $_GET['q'] : '';
$query = drupal_query_string_encode($_GET, array('q'));
if ($query != '') {
$path .= '?'. $query;
}
return 'destination='. urlencode($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.
*
* Usually the redirected URL is constructed from this function's input
* parameters. However you may override that behavior by setting a
* <em>destination</em> in either the $_REQUEST-array (i.e. by using
* the query string of an URI) or the $_REQUEST['edit']-array (i.e. by
* using a hidden form field). This is used to direct the user back to
* the proper page after completing a form. For example, after editing
* a post on the 'admin/content/node'-page or after having logged on using the
* 'user login'-block in a sidebar. The function drupal_get_destination()
* can be used to help set the destination URL.
*
* It is advised to use drupal_goto() instead of PHP's header(), because
* drupal_goto() will append the user's session ID to the URI when PHP is
* compiled with "--enable-trans-sid".
*
* This function ends the request; use it rather than a print theme('page')
* statement in your menu callback.
*
* @param $path
* A Drupal path or a full URL.
* @param $query
* The query string component, if any. * @param $fragment
* The destination fragment identifier (named anchor).
* @param $http_response_code
* Valid values for an actual "goto" as per RFC 2616 section 10.3 are:
* - 301 Moved Permanently (the recommended value for most redirects)
* - 302 Found (default in Drupal and PHP, sometimes used for spamming search
* engines)
* - 303 See Other
* - 304 Not Modified
* - 305 Use Proxy
* - 307 Temporary Redirect (an alternative to "503 Site Down for Maintenance")
* Note: Other values are defined by RFC 2616, but are rarely used and poorly
* supported.
* @see drupal_get_destination()
*/
function drupal_goto($path = '', $query = NULL, $fragment = NULL, $http_response_code = 302) {
if (isset($_REQUEST['destination'])) {
extract(parse_url(urldecode($_REQUEST['destination'])));
}
else if (isset($_REQUEST['edit']['destination'])) {
extract(parse_url(urldecode($_REQUEST['edit']['destination'])));
}
$url = url($path, array('query' => $query, 'fragment' => $fragment, 'absolute' => TRUE));
// Before the redirect, allow modules to react to the end of the page request.
module_invoke_all('exit', $url);
header('Location: '. $url, TRUE, $http_response_code);
// The "Location" header sends a REDIRECT status code to the http
// daemon. In some cases this can go wrong, so we make sure none
// of the code below the drupal_goto() call gets executed when we redirect.
exit();
}
/**
* Generates a site off-line message
*/
function drupal_site_offline() {
drupal_maintenance_theme();
drupal_set_header('HTTP/1.1 503 Service unavailable');
drupal_set_title(t('Site off-line'));
print theme('maintenance_page', filter_xss_admin(variable_get('site_offline_message',
t('@site is currently under maintenance. We should be back shortly. Thank you for your patience.', array('@site' => variable_get('site_name', 'Drupal'))))));
}
/**
* Generates a 404 error if the request can not be handled.
*/
function drupal_not_found() {
drupal_set_header('HTTP/1.1 404 Not Found');
watchdog('page not found', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
// Keep old path for reference
if (!isset($_REQUEST['destination'])) {
$_REQUEST['destination'] = $_GET['q'];
}
$path = drupal_get_normal_path(variable_get('site_404', ''));
if ($path && $path != $_GET['q']) {
// Set the active item in case there are tabs to display, or other
// dependencies on the path.
menu_set_active_item($path);
$return = menu_execute_active_handler($path);
}
if (empty($return)) {
drupal_set_title(t('Page not found')); $return = '';
}
// To conserve CPU and bandwidth, omit the blocks
print theme('page', $return, FALSE);
}
/**
* Generates a 403 error if the request is not allowed.
*/
function drupal_access_denied() {
drupal_set_header('HTTP/1.1 403 Forbidden');
watchdog('access denied', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
// Keep old path for reference
if (!isset($_REQUEST['destination'])) {
$_REQUEST['destination'] = $_GET['q'];
}
$path = drupal_get_normal_path(variable_get('site_403', ''));
if ($path && $path != $_GET['q']) {
// Set the active item in case there are tabs to display, or other
// dependencies on the path.
menu_set_active_item($path);
$return = menu_execute_active_handler($path);
}
if (empty($return)) {
drupal_set_title(t('Access denied'));
$return = t('You are not authorized to access this page.');
}
print theme('page', $return);
}
/**
* 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 $headers
* An array containing an HTTP header => value pair.
* @param $method
* A string defining the HTTP request to use.
* @param $data
* A string containing data to include in the request.
* @param $retry
* An integer representing how many times to retry the request in case of a
* redirect.
* @return
* An object containing the HTTP request headers, response code, headers,
* data, and redirect status.
*/
function drupal_http_request($url, $headers = array(), $method = 'GET', $data = NULL, $retry = 3) {
$result = new stdClass();
// Parse the URL, and make sure we can handle the schema.
$uri = parse_url($url);
switch ($uri['scheme']) {
case 'http':
$port = isset($uri['port']) ? $uri['port'] : 80;
$host = $uri['host'] . ($port != 80 ? ':'. $port : '');
$fp = @fsockopen($uri['host'], $port, $errno, $errstr, 15);
break;
case 'https':
// Note: Only works for PHP 4.3 compiled with OpenSSL.
$port = isset($uri['port']) ? $uri['port'] : 443;
$host = $uri['host'] . ($port != 443 ? ':'. $port : ''); $fp = @fsockopen('ssl://'. $uri['host'], $port, $errno, $errstr, 20);
break;
default:
$result->error = 'invalid schema '. $uri['scheme'];
return $result;
}
// Make sure the socket opened properly.
if (!$fp) {
// When a network error occurs, we make sure that it is a negative
// number so it can clash with the HTTP status codes.
$result->code = -$errno;
$result->error = trim($errstr);
return $result;
}
// Construct the path to act on.
$path = isset($uri['path']) ? $uri['path'] : '/';
if (isset($uri['query'])) {
$path .= '?'. $uri['query'];
}
// Create HTTP request.
$defaults = array(
// RFC 2616: "non-standard ports MUST, default ports MAY be included".
// We don't add the port to prevent from breaking rewrite rules checking
// the host that do not take into account the port number.
'Host' => "Host: $host",
'User-Agent' => 'User-Agent: Drupal (+http://drupal.org/)',
'Content-Length' => 'Content-Length: '. strlen($data)
);
foreach ($headers as $header => $value) {
$defaults[$header] = $header .': '. $value;
}
$request = $method .' '. $path ." HTTP/1.0\r\n";
$request .= implode("\r\n", $defaults);
$request .= "\r\n\r\n";
if ($data) {
$request .= $data ."\r\n";
}
$result->request = $request;
fwrite($fp, $request);
// Fetch response.
$response = '';
while (!feof($fp) && $chunk = fread($fp, 1024)) {
$response .= $chunk;
}
fclose($fp);
// Parse response.
list($split, $result->data) = explode("\r\n\r\n", $response, 2);
$split = preg_split("/\r\n|\n|\r/", $split);
list($protocol, $code, $text) = explode(' ', trim(array_shift($split)), 3);
$result->headers = array();
// Parse headers.
while ($line = trim(array_shift($split))) {
list($header, $value) = explode(':', $line, 2);
if (isset($result->headers[$header]) && $header == '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.
$result->headers[$header] .= ','. trim($value);
}
else {
$result->headers[$header] = 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;
}
switch ($code) {
case 200: // OK
case 304: // Not modified
break;
case 301: // Moved permanently
case 302: // Moved temporarily
case 307: // Moved temporarily
$location = $result->headers['Location'];
if ($retry) {
$result = drupal_http_request($result->headers['Location'], $headers, $method, $data, --$retry);
$result->redirect_code = $result->code;
}
$result->redirect_url = $location;
break;
default:
$result->error = $text;
}
$result->code = $code;
return $result;
}
/**
* @} End of "HTTP handling".
*/
/**
* Log errors as defined by administrator
* Error levels:
* 0 = Log errors to database.
* 1 = Log errors to database and to screen.
*/
function drupal_error_handler($errno, $message, $filename, $line, $context) {
// If the @ error suppression operator was used, error_reporting is temporarily set to 0
if (error_reporting() == 0) {
return;
}
if ($errno & (E_ALL ^ E_NOTICE)) {
$types = array(1 => 'error', 2 => 'warning', 4 => 'parse error', 8 => 'notice', 16 => 'core error', 32 => 'core warning', 64 => 'compile error', 128 => 'compile warning', 256 => 'user error', 512 => 'user warning', 1024 => 'user notice', 2048 => 'strict warning');
// For database errors, we want the line number/file name of the place that
// the query was originally called, not _db_query().
if (isset($context[DB_ERROR])) {
$backtrace = array_reverse(debug_backtrace());
// List of functions where SQL queries can originate.
$query_functions = array('db_query', 'pager_query', 'db_query_range', 'db_query_temporary', 'update_sql');
// Determine where query function was called, and adjust line/file
// accordingly.
foreach ($backtrace as $index => $function) {
if (in_array($function['function'], $query_functions)) { $line = $backtrace[$index]['line'];
$filename = $backtrace[$index]['file'];
break;
}
}
}
$entry = $types[$errno] .': '. $message .' in '. $filename .' on line '. $line .'.';
// Force display of error messages in update.php
if (variable_get('error_level', 1) == 1 || strstr($_SERVER['SCRIPT_NAME'], 'update.php')) {
drupal_set_message($entry, 'error');
}
watchdog('php', '%message in %file on line %line.', array('%error' => $types[$errno], '%message' => $message, '%file' => $filename, '%line' => $line), WATCHDOG_ERROR);
}
}
function _fix_gpc_magic(&$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);
}
}
}
/**
* Correct 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');
$fixed = TRUE;
}
}
/**
* Translate strings to the page language or a given language.
*
* All human-readable text that will be displayed somewhere within a page should be
* run through the t() function.
*
* Examples:
* @code
* if (!$info || !$info['extension']) { * form_set_error('picture_upload', t('The uploaded file was not an image.'));
* }
*
* $form['submit'] = array(
* '#type' => 'submit',
* '#value' => t('Log in'),
* );
* @endcode
*
* Any text within t() can be extracted by translators and changed into
* the equivalent text in their native language.
*
* Special variables called "placeholders" are used to signal dynamic
* information in a string which should not be translated. Placeholders
* can also be used for text that may change from time to time
* (such as link paths) to be changed without requiring updates to translations.
*
* For example:
* @code
* $output = t('There are currently %members and %visitors online.', array(
* '%members' => format_plural($total_users, '1 user', '@count users'),
* '%visitors' => format_plural($guests->count, '1 guest', '@count guests')));
* @endcode
*
* There are three styles of placeholders:
* - !variable, which indicates that the text should be inserted as-is. This is
* useful for inserting variables into things like e-mail.
* @code
* $message[] = t("If you don't want to receive such e-mails, you can change your settings at !url.", array('!url' => url("user/$account->uid", array('absolute' => TRUE))));
* @endcode
*
* - @variable, which indicates that the text should be run through check_plain,
* to strip out HTML characters. Use this for any output that's displayed within
* a Drupal page.
* @code
* drupal_set_title($title = t("@name's blog", array('@name' => $account->name)));
* @endcode
*
* - %variable, which indicates that the string should be highlighted with
* theme_placeholder() which shows up by default as <em>emphasized</em>.
* @code
* $message = t('%name-from sent %name-to an e-mail.', array('%name-from' => $user->name, '%name-to' => $account->name));
* @endcode
*
* When using t(), try to put entire sentences and strings in one t() call.
* This makes it easier for translators, as it provides context as to what
* each word refers to. HTML markup within translation strings is allowed,
* but should be avoided if possible. The exception is embedded links; link
* titles add additional context for translators so should be kept in the main
* string.
*
* Here is an example of an incorrect use if t():
* @code
* $output .= t('<p>Go to the @contact-page.</p>', array('@contact-page' => l(t('contact page'), 'contact')));
* @endcode
*
* Here is an example of t() used correctly:
* @code
* $output .= '<p>'. t('Go to the <a href="@contact-page">contact page</a>.', array('@contact-page' => url('contact'))) .'</p>';
* @endcode
*
* Also avoid escaping quotation marks wherever possible.
*
* Incorrect:
* @code
* $output .= t('Don\'t click me.');
* @endcode
*
* Correct:
* @code * $output .= t("Don't click me.");
* @endcode
*
* @param $string
* A string containing the English string to translate.
* @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 + theme_placeholder)
* @param $langcode
* Optional language code to translate to a language other than
* what is used to display the page.
* @return
* The translated string.
*/
function t($string, $args = array(), $langcode = NULL) {
global $language;
static $custom_strings;
$langcode = isset($langcode) ? $langcode : $language->language;
// First, check for an array of customized strings. If present, use the array
// *instead of* database lookups. This is a high performance way to provide a
// handful of string replacements. See settings.php for examples.
// Cache the $custom_strings variable to improve performance.
if (!isset($custom_strings[$langcode])) {
$custom_strings[$langcode] = variable_get('locale_custom_strings_'. $langcode, array());
}
// Custom strings work for English too, even if locale module is disabled.
if (isset($custom_strings[$langcode][$string])) {
$string = $custom_strings[$langcode][$string];
}
// Translate with locale module if enabled.
elseif (function_exists('locale') && $langcode != 'en') {
$string = locale($string, $langcode);
}
if (empty($args)) {
return $string;
}
else {
// Transform arguments before inserting them
foreach ($args as $key => $value) {
switch ($key[0]) {
// Escaped only
case '@':
$args[$key] = check_plain($value);
break;
// Escaped and placeholder
case '%':
default:
$args[$key] = theme('placeholder', $value);
break;
// Pass-through
case '!':
}
}
return strtr($string, $args);
}
}
/**
* @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) {
$user = '[a-zA-Z0-9_\-\.\+\^!#\$%&*+\/\=\?\`\|\{\}~\']+';
$domain = '(?:(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.?)+';
$ipv4 = '[0-9]{1,3}(\.[0-9]{1,3}){3}';
$ipv6 = '[0-9a-fA-F]{1,4}(\:[0-9a-fA-F]{1,4}){7}';
return preg_match("/^$user@($domain|(\[($ipv4|$ipv6)\]))$/", $mail);
}
/**
* 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.
*
* @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) {
$allowed_characters = '[a-z0-9\/:_\-_\.\?\$,;~=#&%\+]';
if ($absolute) {
return preg_match("/^(http|https|ftp):\/\/". $allowed_characters ."+$/i", $url);
}
else {
return preg_match("/^". $allowed_characters ."+$/i", $url);
}
}
/**
* Register an event for the current visitor (hostname/IP) to the flood control mechanism.
*
* @param $name
* The name of the event.
*/
function flood_register_event($name) {
db_query("INSERT INTO {flood} (event, hostname, timestamp) VALUES ('%s', '%s', %d)", $name, ip_address(), time());
}
/**
* Check if the current visitor (hostname/IP) is allowed to proceed with the specified event.
* The user is allowed to proceed if he did not trigger the specified event more than
* $threshold times per hour.
*
* @param $name
* The name of the event.
* @param $number
* The maximum number of the specified event per hour (per visitor).
* @return
* True if the user did not exceed the hourly threshold. False otherwise.
*/
function flood_is_allowed($name, $threshold) {
$number = db_result(db_query("SELECT COUNT(*) FROM {flood} WHERE event = '%s' AND hostname = '%s' AND timestamp > %d", $name, ip_address(), time() - 3600));
return ($number < $threshold ? TRUE : FALSE);
}
function check_file($filename) { return is_uploaded_file($filename);
}
/**
* Prepare a URL for use in an HTML attribute. Strips harmful protocols.
*
*/
function check_url($uri) {
return filter_xss_bad_protocol($uri, FALSE);
}
/**
* @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;
$langcode = $langcode ? $langcode : $language->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 represent 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 ($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 + theme_placeholder)
* Note that you do not need to include @count in this array.
* This replacement is done automatically for the plural case.
* @param $langcode
* Optional language code to translate to a language other than
* what is used to display the page.
* @return * A translated string.
*/
function format_plural($count, $singular, $plural, $args = array(), $langcode = NULL) {
$args['@count'] = $count;
if ($count == 1) {
return t($singular, $args, $langcode);
}
// get the plural index through the gettext formula
$index = (function_exists('locale_get_plural')) ? locale_get_plural($count, $langcode) : -1;
if ($index < 0) { // backward compatibility
return t($plural, $args, $langcode);
}
else {
switch ($index) {
case "0":
return t($singular, $args, $langcode);
case "1":
return t($plural, $args, $langcode);
default:
unset($args['@count']);
$args['@count['. $index .']'] = $count;
return t(strtr($plural, array('@count' => '@count['. $index .']')), $args, $langcode);
}
}
}
/**
* Parse a given byte count.
*
* @param $size
* The size expressed as a number of bytes with optional SI size and unit
* suffix (e.g. 2, 3K, 5MB, 10G).
* @return
* An integer representation of the size.
*/
function parse_size($size) {
$suffixes = array(
'' => 1,
'k' => 1024,
'm' => 1048576, // 1024 * 1024
'g' => 1073741824, // 1024 * 1024 * 1024
);
if (preg_match('/([0-9]+)\s*(k|m|g)?(b?(ytes?)?)/i', $size, $match)) {
return $match[1] * $suffixes[drupal_strtolower($match[2])];
}
}
/**
* Generate a string representation for the given byte count.
*
* @param $size
* The 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 < 1024) {
return format_plural($size, '1 byte', '@count bytes', array(), $langcode);
}
else {
$size = round($size / 1024, 2);
$suffix = t('KB', array(), $langcode);
if ($size >= 1024) {
$size = round($size / 1024, 2);
$suffix = t('MB', array(), $langcode);
} return t('@size @suffix', array('@size' => $size, '@suffix' => $suffix), $langcode);
}
}
/**
* 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 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(), $langcode);
$timestamp %= $value;
$granularity--;
}
if ($granularity == 0) {
break;
}
}
return $output ? $output : t('0 sec', array(), $langcode);
}
/**
* Format a date with the given configured format or a custom format string.
*
* Drupal allows administrators to select formatting strings for 'small',
* 'medium' and 'large' date formats. This function can handle these formats,
* as well as any custom format.
*
* @param $timestamp
* The exact date to format, as a UNIX timestamp.
* @param $type
* The format to use. Can be "small", "medium" or "large" for the preconfigured
* date formats. If "custom" is specified, then $format is required as well.
* @param $format
* A PHP date format string as required by date(). A backslash should be used
* before a character to avoid interpreting the character as part of a date
* format.
* @param $timezone
* Time zone offset in seconds; if omitted, the user's time zone is used.
* @param $langcode
* Optional language code to translate to a language other than
* what is used to display the page.
* @return
* A translated date string in the requested format.
*/
function format_date($timestamp, $type = 'medium', $format = '', $timezone = NULL, $langcode = NULL) {
if (!isset($timezone)) {
global $user;
if (variable_get('configurable_timezones', 1) && $user->uid && strlen($user->timezone)) {
$timezone = $user->timezone;
}
else {
$timezone = variable_get('date_default_timezone', 0);
}
}
$timestamp += $timezone;
switch ($type) {
case 'small':
$format = variable_get('date_format_short', 'm/d/Y - H:i');
break;
case 'large':
$format = variable_get('date_format_long', 'l, F j, Y - H:i');
break;
case 'custom':
// No change to format
break;
case 'medium':
default:
$format = variable_get('date_format_medium', 'D, m/d/Y - H:i');
}
$max = strlen($format);
$date = '';
for ($i = 0; $i < $max; $i++) {
$c = $format[$i];
if (strpos('AaDlM', $c) !== FALSE) {
$date .= t(gmdate($c, $timestamp), array(), $langcode);
}
else if ($c == 'F') {
// Special treatment for long month names: May is both an abbreviation
// and a full month name in English, but other languages have
// different abbreviations.
$date .= trim(t('!long-month-name '. gmdate($c, $timestamp), array('!long-month-name' => ''), $langcode));
}
else if (strpos('BdgGhHiIjLmnsStTUwWYyz', $c) !== FALSE) {
$date .= gmdate($c, $timestamp);
}
else if ($c == 'r') {
$date .= format_date($timestamp - $timezone, 'custom', 'D, d M Y H:i:s O', $timezone, $langcode);
}
else if ($c == 'O') {
$date .= sprintf('%s%02d%02d', ($timezone < 0 ? '-' : '+'), abs($timezone / 3600), abs($timezone % 3600) / 60);
}
else if ($c == 'Z') {
$date .= $timezone;
}
else if ($c == '\\') {
$date .= $format[++$i];
}
else {
$date .= $c;
}
}
return $date;
}
/**
* @} End of "defgroup format".
*/
/**
* Generate a URL from a Drupal menu path. Will also pass-through existing URLs.
*
* @param $path
* The Drupal path being linked to, such as "admin/content/node", or an existing URL
* like "http://drupal.org/".
* @param $options
* An associative array of additional options, with the following keys:
* 'query'
* A query string to append to the link, or an array of query key/value
* properties.
* 'fragment'
* A fragment identifier (or named anchor) to append to the link. * Do not include the '#' character.
* 'absolute' (default FALSE)
* Whether to force the output to be an absolute link (beginning with
* http:). Useful for links that will be displayed outside the site, such
* as in an RSS feed.
* 'alias' (default FALSE)
* Whether the given path is an alias already.
* @return
* a string containing a URL to the given path.
*
* When creating links in modules, consider whether l() could be a better
* alternative than url().
*/
function url($path = NULL, $options = array()) {
// Merge in defaults
$options += array(
'fragment' => '',
'query' => '',
'absolute' => FALSE,
'alias' => FALSE,
);
// May need language dependant rewriting if language.inc is present
if (function_exists('language_url_rewrite')) {
language_url_rewrite($path, $options);
}
if ($options['fragment']) {
$options['fragment'] = '#'. $options['fragment'];
}
if (is_array($options['query'])) {
$options['query'] = drupal_query_string_encode($options['query']);
}
// Return an external link if $path contains an allowed absolute URL.
// Only call the slow filter_xss_bad_protocol if $path contains a ':' before any / ? or #.
$colonpos = strpos($path, ':');
if ($colonpos !== FALSE && !preg_match('![/?#]!', substr($path, 0, $colonpos)) && filter_xss_bad_protocol($path, FALSE) == check_plain($path)) {
// Split off the fragment
if (strpos($path, '#') !== FALSE) {
list($path, $old_fragment) = explode('#', $path, 2);
if (isset($old_fragment) && !$options['fragment']) {
$options['fragment'] = '#'. $old_fragment;
}
}
// Append the query
if ($options['query']) {
$path .= (strpos($path, '?') !== FALSE ? '&' : '?') . $options['query'];
}
// Reassemble
return $path . $options['fragment'];
}
global $base_url;
static $script;
static $clean_url;
if (!isset($script)) {
// On some web servers, such as IIS, we can't omit "index.php". So, we
// generate "index.php?q=foo" instead of "?q=foo" on anything that is not
// Apache.
$script = (strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') === FALSE) ? 'index.php' : '';
}
// Cache the clean_url variable to improve performance.
if (!isset($clean_url)) {
$clean_url = (bool)variable_get('clean_url', '0');
}
$base = $options['absolute'] ? $base_url .'/' : base_path();
// Preserve the original path before aliasing.
$original_path = $path;
// The special path '<front>' links to the default front page.
if (!empty($path) && $path != '<front>') {
if (!$options['alias']) {
$path = drupal_get_path_alias($path);
}
if (function_exists('custom_url_rewrite_outbound')) {
// Modules may alter outbound links by reference.
custom_url_rewrite_outbound($path, $options, $original_path);
}
$path = drupal_urlencode($path);
if (!$clean_url) {
if ($options['query']) {
return $base . $script .'?q='. $path .'&'. $options['query'] . $options['fragment'];
}
else {
return $base . $script .'?q='. $path . $options['fragment'];
}
}
else {
if ($options['query']) {
return $base . $path .'?'. $options['query'] . $options['fragment'];
}
else {
return $base . $path . $options['fragment'];
}
}
}
else {
if ($options['query']) {
return $base . $script .'?'. $options['query'] . $options['fragment'];
}
else {
return $base . $options['fragment'];
}
}
}
/**
* Format an attribute string to insert in a tag.
*
* @param $attributes
* An associative array of HTML attributes.
* @return
* An HTML string ready for insertion in a tag.
*/
function drupal_attributes($attributes = array()) {
if (is_array($attributes)) {
$t = '';
foreach ($attributes as $key => $value) {
$t .= " $key=".'"'. check_plain($value) .'"';
}
return $t;
}
}
/**
* Format an internal Drupal link.
*
* This function correctly handles aliased paths, and allows themes to highlight
* links to the current page correctly, so all internal links output by modules
* should be generated by this function if possible.
*
* @param $text
* The text to be enclosed with the anchor tag.
* @param $path
* The Drupal path being linked to, such as "admin/content/node". Can be an
* external or internal URL. * - If you provide the full URL, it will be considered an external URL.
* - If you provide only the path (e.g. "admin/content/node"), it is
* considered an internal link. In this case, it must be a system URL
* as the url() function will generate the alias.
* - If you provide a path, and 'alias' is set to TRUE (see below), it is
* used as is.
* @param $options
* An associative array of additional options, with the following keys:
* 'attributes'
* An associative array of HTML attributes to apply to the anchor tag.
* 'query'
* A query string to append to the link, or an array of query key/value
* properties.
* 'fragment'
* A fragment identifier (named anchor) to append to the link.
* Do not include the '#' character.
* 'absolute' (default FALSE)
* Whether to force the output to be an absolute link (beginning with
* http:). Useful for links that will be displayed outside the site, such
* as in an RSS feed.
* 'html' (default FALSE)
* Whether the title is HTML, or just plain-text. For example for making
* an image a link, this must be set to TRUE, or else you will see the
* escaped HTML.
* 'alias' (default FALSE)
* Whether the given path is an alias already.
* @return
* an HTML string containing a link to the given path.
*/
function l($text, $path, $options = array()) {
// Merge in defaults
$options += array(
'attributes' => array(),
'html' => FALSE,
);
// Append active class
if ($path == $_GET['q']) {
if (isset($options['attributes']['class'])) {
$options['attributes']['class'] .= ' active';
}
else {
$options['attributes']['class'] = 'active';
}
}
return '<a href="'. check_url(url($path, $options)) .'"'. drupal_attributes($options['attributes']) .'>'. ($options['html'] ? $text : check_plain($text)) .'</a>';
}
/**
* 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() {
if (variable_get('cache', 0)) {
page_set_cache();
}
module_invoke_all('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 $function
* The name of a function to apply to all values before output.
* @result
* An associative array.
*/
function drupal_map_assoc($array, $function = NULL) {
if (!isset($function)) {
$result = array();
foreach ($array as $value) {
$result[$value] = $value;
}
return $result;
}
elseif (function_exists($function)) {
$result = array();
foreach ($array as $value) {
$result[$value] = $function($value);
}
return $result;
}
}
/**
* Evaluate a string of PHP code.
*
* This is a wrapper around PHP's eval(). It uses output buffering to capture both
* returned and printed text. Unlike eval(), we require code to be surrounded by
* <?php ?> tags; in other words, we evaluate the code as if it were a stand-alone
* PHP file.
*
* Using this wrapper also ensures that the PHP code which is evaluated can not
* overwrite any variables in the calling code, unlike a regular eval() call.
*
* @param $code
* The code to evaluate.
* @return
* A string containing the printed output of the code, followed by the returned
* output of the code.
*/
function drupal_eval($code) {
ob_start();
print eval('?>'. $code);
$output = ob_get_contents();
ob_end_clean();
return $output;
}
/**
* Returns the path to a system item (module, theme, etc.).
*
* @param $type
* The type of the item (i.e. theme, theme_engine, module).
* @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));
}
/**
* Returns the base URL path of the Drupal installation.
* At the very least, this will always default to /.
*/
function base_path() { return $GLOBALS['base_path'];
}
/**
* Provide a substitute clone() function for PHP4.
*/
function drupal_clone($object) {
return version_compare(phpversion(), '5.0') < 0 ? $object : clone($object);
}
/**
* Add a <link> tag to the page's HEAD.
*/
function drupal_add_link($attributes) {
drupal_set_html_head('<link'. drupal_attributes($attributes) ." />\n");
}
/**
* Adds a CSS file to the stylesheet queue.
*
* @param $path
* (optional) The path to the CSS file relative to the base_path(), e.g.,
* /modules/devel/devel.css.
*
* 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 'name.css' will have a '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.
* @param $type
* (optional) The type of stylesheet that is being added. Types are: module
* or theme.
* @param $media
* (optional) The media type for the stylesheet, e.g., all, print, screen.
* @param $preprocess
* (optional) Should this CSS file be aggregated and compressed if this
* feature has been turned on under the performance section?
*
* What does this actually mean?
* CSS preprocessing is the process of aggregating a bunch of separate CSS
* files into one file that is then compressed by removing all extraneous
* white space.
*
* The reason for merging the CSS 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."
*
* However, you should *not* preprocess every file as this can lead to
* redundant caches. You should set $preprocess = FALSE when:
*
* - Your styles are only used rarely on the site. This could be a special
* admin page, the homepage, or a handful of pages that does not represent
* the majority of the pages on your site.
*
* Typical candidates for caching are for example styles for nodes across
* the site, or used in the theme.
* @return
* An array of CSS files.
*/
function drupal_add_css($path = NULL, $type = 'module', $media = 'all', $preprocess = TRUE) {
static $css = array();
global $language;
// Create an array of CSS files for each media type first, since each type needs to be served
// to the browser differently.
if (isset($path)) {
// This check is necessary to ensure proper cascading of styles and is faster than an asort(). if (!isset($css[$media])) {
$css[$media] = array('module' => array(), 'theme' => array());
}
$css[$media][$type][$path] = $preprocess;
// If the current language is RTL, add the CSS file with RTL overrides.
if (defined('LANGUAGE_RTL') && $language->direction == LANGUAGE_RTL) {
$rtl_path = str_replace('.css', '-rtl.css', $path);
if (file_exists($rtl_path)) {
$css[$media][$type][$rtl_path] = $preprocess;
}
}
}
return $css;
}
/**
* Returns a themed representation of all stylesheets that should be attached to the page.
* It loads the CSS in order, with 'core' CSS first, then 'module' CSS, then 'theme' CSS files.
* This ensures proper cascading of styles for easy overriding in modules and themes.
*
* @param $css
* (optional) An array of CSS files. If no array is provided, the default stylesheets array is used instead.
* @return
* A string of XHTML CSS tags.
*/
function drupal_get_css($css = NULL) {
$output = '';
if (!isset($css)) {
$css = drupal_add_css();
}
$no_module_preprocess = '';
$no_theme_preprocess = '';
$preprocess_css = variable_get('preprocess_css', FALSE);
$directory = file_directory_path();
$is_writable = is_dir($directory) && is_writable($directory) && (variable_get('file_downloads', FILE_DOWNLOADS_PUBLIC) == FILE_DOWNLOADS_PUBLIC);
foreach ($css as $media => $types) {
// If CSS preprocessing is off, we still need to output the styles.
// Additionally, go through any remaining styles if CSS preprocessing is on and output the non-cached ones.
foreach ($types as $type => $files) {
foreach ($types[$type] as $file => $preprocess) {
if (!$preprocess || !($is_writable && $preprocess_css)) {
// If a CSS file is not to be preprocessed and it's a module CSS file, it needs to *always* appear at the *top*,
// regardless of whether preprocessing is on or off.
if (!$preprocess && $type == 'module') {
$no_module_preprocess .= '<link type="text/css" rel="stylesheet" media="'. $media .'" href="'. base_path() . $file .'" />'."\n";
}
// If a CSS file is not to be preprocessed and it's a theme CSS file, it needs to *always* appear at the *bottom*,
// regardless of whether preprocessing is on or off.
else if (!$preprocess && $type == 'theme') {
$no_theme_preprocess .= '<link type="text/css" rel="stylesheet" media="'. $media .'" href="'. base_path() . $file .'" />'."\n";
}
else {
$output .= '<link type="text/css" rel="stylesheet" media="'. $media .'" href="'. base_path() . $file . '" />'."\n";
}
}
}
}
if ($is_writable && $preprocess_css) {
$filename = md5(serialize($types)) .'.css';
$preprocess_file = drupal_build_css_cache($types, $filename);
$output .= '<link type="text/css" rel="stylesheet" media="'. $media .'" href="'. base_path() . $preprocess_file .'" />'."\n";
}
}
return $no_module_preprocess . $output . $no_theme_preprocess;}
/**
* Aggregate and optimize CSS files, putting them in the files directory.
*
* @param $types
* An array of types of CSS files (e.g., screen, print) to aggregate and compress into one file.
* @param $filename
* The name of the aggregate CSS file.
* @return
* The name of the CSS file.
*/
function drupal_build_css_cache($types, $filename) {
$data = '';
// Create the css/ within the files folder.
$csspath = file_create_path('css');
file_check_directory($csspath, FILE_CREATE_DIRECTORY);
if (!file_exists($csspath .'/'. $filename)) {
// Build aggregate CSS file.
foreach ($types as $type) {
foreach ($type as $file => $cache) {
if ($cache) {
$contents = file_get_contents($file);
// Return the path to where this CSS file originated from, stripping
// off the name of the file at the end of the path.
$path = base_path() . substr($file, 0, strrpos($file, '/')) .'/';
// Wraps all @import arguments in url().
$contents = preg_replace('/@import\s+(?!url)[\'"]?(\S*)\b[\'"]?/i', '@import url("\1")', $contents);
// Fix all paths within this CSS file, ignoring absolute paths.
$data .= preg_replace('/url\(([\'"]?)(?![a-z]+:)/i', 'url(\1'. $path . '\2', $contents);
}
}
}
// Per the W3C specification at http://www.w3.org/TR/REC-CSS2/cascade.html#at-import,
// @import rules must proceed any other style, so we move those to the top.
$regexp = '/@import[^;]+;/i';
preg_match_all($regexp, $data, $matches);
$data = preg_replace($regexp, '', $data);
$data = implode('', $matches[0]) . $data;
// Perform some safe CSS optimizations.
$data = preg_replace('<
\s*([@{}:;,]|\)\s|\s\()\s* | # Remove whitespace around separators, but keep space around parentheses.
/\*([^*\\\\]|\*(?!/))+\*/ | # Remove comments that are not CSS hacks.
[\n\r] # Remove line breaks.
>x', '\1', $data);
// Create the CSS file.
file_save_data($data, $csspath .'/'. $filename, FILE_EXISTS_REPLACE);
}
return $csspath .'/'. $filename;
}
/**
* Delete all cached CSS files.
*/
function drupal_clear_css_cache() {
file_scan_directory(file_create_path('css'), '.*', array('.', '..', 'CVS'), 'file_delete', TRUE);
}
/**
* Add 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 ('core', 'module' and 'theme'):
* Adds a reference to a JavaScript file to the page. JavaScript files
* are placed in a certain order, from 'core' first, to 'module' and finally
* 'theme' so that files, that are added later, can override previously added
* files with ease.
*
* - Add inline JavaScript code ('inline'):
* Executes a piece of JavaScript code on the current page by placing the code
* directly in the page. This can, for example, be useful to tell the user that
* a new message arrived, by opening a pop up, alert box etc.
*
* - Add settings ('setting'):
* Adds a setting to Drupal's global storage of JavaScript settings. Per-page
* settings are required by some modules to function properly. The settings
* will be accessible at Drupal.settings.
*
* @param $data
* (optional) If given, the value depends on the $type parameter:
* - 'core', 'module' or 'theme': Path to the file relative to base_path().
* - 'inline': The JavaScript code that should be placed in the given scope.
* - 'setting': An array with configuration options as associative array. The
* array is directly placed in Drupal.settings. You might want to wrap your
* actual configuration settings in another variable to prevent the pollution
* of the Drupal.settings namespace.
* @param $type
* (optional) The type of JavaScript that should be added to the page. Allowed
* values are 'core', 'module', 'theme', 'inline' and 'setting'. You
* can, however, specify any value. It is treated as a reference to a JavaScript
* file. Defaults to 'module'.
* @param $scope
* (optional) The location in which you want to place the script. Possible
* values are 'header' and 'footer' by default. If your theme implements
* different locations, however, you can also use these.
* @param $defer
* (optional) If set to TRUE, the defer attribute is set on the <script> tag.
* Defaults to FALSE. This parameter is not used with $type == 'setting'.
* @param $cache
* (optional) If set to FALSE, the JavaScript file is loaded anew on every page
* call, that means, it is not cached. Defaults to TRUE. Used only when $type
* references a JavaScript file.
* @param $preprocess
* (optional) Should this JS file be aggregated if this
* feature has been turned on under the performance section?
* @return
* If the first parameter is NULL, the JavaScript array that has been built so
* far for $scope is returned. If the first three parameters are NULL,
* an array with all scopes is returned.
*/
function drupal_add_js($data = NULL, $type = 'module', $scope = 'header', $defer = FALSE, $cache = TRUE, $preprocess = TRUE) {
static $javascript = array();
// Add jquery.js and drupal.js the first time a Javascript file is added.
if (isset($data) && empty($javascript)) {
$javascript['header'] = array(
'core' => array(
'misc/jquery.js' => array('cache' => TRUE, 'defer' => FALSE, 'preprocess' => TRUE),
'misc/drupal.js' => array('cache' => TRUE, 'defer' => FALSE, 'preprocess' => TRUE),
),
'module' => array(), 'theme' => array(), 'setting' => array(), 'inline' => array(),
);
}
if (isset($scope) && !isset($javascript[$scope])) {
$javascript[$scope] = array('core' => array(), 'module' => array(), 'theme' => array(), 'setting' => array(), 'inline' => array());
}
if (isset($type) && isset($scope) && !isset($javascript[$scope][$type])) {
$javascript[$scope][$type] = array();
}
if (isset($data)) {
switch ($type) {
case 'setting':
$javascript[$scope][$type][] = $data;
break;
case 'inline':
$javascript[$scope][$type][] = array('code' => $data, 'defer' => $defer);
break;
default:
// If cache is FALSE, don't preprocess the JS file.
$javascript[$scope][$type][$data] = array('cache' => $cache, 'defer' => $defer, 'preprocess' => (!$cache ? FALSE : $preprocess));
}
}
if (isset($scope)) {
return $javascript[$scope];
}
else {
return $javascript;
}
}
/**
* 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.
*
* @parameter $scope
* (optional) The scope for which the JavaScript rules should be returned.
* Defaults to 'header'.
* @parameter $javascript
* (optional) An array with all JavaScript code. Defaults to the default
* JavaScript array for the given scope.
* @return
* All JavaScript code segments and includes for the scope as HTML tags.
*/
function drupal_get_js($scope = 'header', $javascript = NULL) {
if (function_exists('locale_inc_callback')) {
locale_inc_callback('_locale_update_js_files');
}
if (!isset($javascript)) {
$javascript = drupal_add_js(NULL, NULL, $scope);
}
if (count($javascript) < 1) {
return '';
}
$output = '';
$preprocessed = '';
$no_preprocess = array('core' => '', 'module' => '', 'theme' => '');
$files = array();
$preprocess_js = variable_get('preprocess_js', FALSE);
$directory = file_directory_path();
$is_writable = is_dir($directory) && is_writable($directory) && (variable_get('file_downloads', FILE_DOWNLOADS_PUBLIC) == FILE_DOWNLOADS_PUBLIC);
foreach ($javascript as $type => $data) {
if (!$data) continue;
switch ($type) {
case 'setting':
$output .= '<script type="text/javascript">jQuery.extend(Drupal.settings, '. drupal_to_js(call_user_func_array('array_merge_recursive', $data)) .");</script>\n";
break;
case 'inline':
foreach ($data as $info) {
$output .= '<script type="text/javascript"'. ($info['defer'] ? ' defer="defer"' : '') .'>'. $info['code'] ."</script>\n"; }
break;
default:
// If JS preprocessing is off, we still need to output the scripts.
// Additionally, go through any remaining scripts if JS preprocessing is on and output the non-cached ones.
foreach ($data as $path => $info) {
if (!$info['preprocess'] || !$is_writable || !$preprocess_js) {
$no_preprocess[$type] .= '<script type="text/javascript"'. ($info['defer'] ? ' defer="defer"' : '') .' src="'. base_path() . $path . ($info['cache'] ? '' : '?'. time()) ."\"></script>\n";
}
else {
$files[$path] = $info;
}
}
}
}
// Aggregate any remaining JS files that haven't already been output.
if ($is_writable && $preprocess_js && count($files) > 0) {
$filename = md5(serialize($files)) .'.js';
$preprocess_file = drupal_build_js_cache($files, $filename);
$preprocessed .= '<script type="text/javascript" src="'. base_path() . $preprocess_file .'"></script>'. "\n";
}
// 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.
$output = $preprocessed . implode('', $no_preprocess) . $output;
return $output;
}
/**
* Aggregate JS files, putting them in the files directory.
*
* @param $files
* An array of JS files to aggregate and compress into one file.
* @param $filename
* The name of the aggregate JS file.
* @return
* The name of the JS file.
*/
function drupal_build_js_cache($files, $filename) {
$contents = '';
// Create the js/ within the files folder.
$jspath = file_create_path('js');
file_check_directory($jspath, FILE_CREATE_DIRECTORY);
if (!file_exists($jspath .'/'. $filename)) {
// Build aggregate JS file.
foreach ($files as $path => $info) {
if ($info['preprocess']) {
// Append a ';' after each JS file to prevent them from running together.
$contents .= _drupal_compress_js(file_get_contents($path). ';');
}
}
// Create the JS file.
file_save_data($contents, $jspath .'/'. $filename, FILE_EXISTS_REPLACE);
}
return $jspath .'/'. $filename;
}
/**
* Perform basic code compression for JavaScript.
*
* Helper function for drupal_pack_js().
*/
function _drupal_compress_js($script) {
$regexps = array( // Protect strings.
array('/\'[^\'\\n\\r]*\'/', '$0'),
array('/"[^"\\n\\r]*"/', '$0'),
// Remove comments.
array('/\\/\\/[^\\n\\r]*[\\n\\r]/', ''),
array('/\\/\\*[^*]*\\*+((?:[^\\/][^*]*\\*+)*)\\//', ''),
// Protect regular expressions
array('/\\s+(\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?)/', '$1'),
array('/[^\\w\\x24\\/\'"*)\\?:]\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?/', '$0'),
// Protect spaces between keywords and variables
array('/(?<=[A-Za-z0-9_$])\\s+(?=[A-Za-z0-9_$])/', ' '),
array('/([+\\-])\\s+([+\\-])/', '$1 $2'),
// Remove all other white-space
array('/\\s+/', ''),
);
$script = _packer_apply($script, $regexps, TRUE);
return $script;
}
/**
* Multi-regexp replacements.
*
* Allows you to perform multiple regular expression replacements at once,
* without overlapping matches.
*
* @param $script
* The text to modify.
* @param $regexps
* An array of replacement instructions, each being a tuple with values:
* - A stand-alone regular expression without modifiers (slash-delimited)
* - A replacement expression, which may include placeholders.
* @param $escape
* Whether to ignore slash-escaped characters for matching. This allows you
* to match e.g. quote-delimited strings with /'[^']+'/ without having to
* worry about \'. Otherwise, you'd have to mess with look-aheads and
* look-behinds to match these.
*/
function _packer_apply($script, $regexps, $escape = FALSE) {
$_regexps = array();
// Process all regexps
foreach ($regexps as $regexp) {
list($expression, $replacement) = $regexp;
// Count the number of matching groups (including the whole).
$length = 1 + preg_match_all('/(?<!\\\\)\((?!\?)/', $expression, $out);
// Treat only strings $replacement
if (is_string($replacement)) {
// Does the pattern deal with sub-expressions?
if (preg_match('/\$\d/', $replacement)) {
if (preg_match('/^\$\d+$/', $replacement)) {
// A simple lookup (e.g. "$2")
// Store the index (used for fast retrieval of matched strings)
$replacement = (int)(substr($replacement, 1));
}
else {
// A complicated lookup (e.g. "Hello $2 $1").
// Build a function to do the lookup.
$replacement = array(
'fn' => 'backreferences',
'data' => array(
'replacement' => $replacement,
'length' => $length,
)
);
}
}
} // Store the modified expression.
if (!empty($expression)) {
$_regexps[] = array($expression, $replacement, $length);
}
else {
$_regexps[] = array('/^$/', $replacement, $length);
}
}
// Execute the global replacement
// Build one mega-regexp out of the smaller ones.
$regexp = '/';
foreach ($_regexps as $_regexp) {
list($expression) = $_regexp;
$regexp .= '(' . substr($expression, 1, -1) . ')|';
}
$regexp = substr($regexp, 0, -1) . '/';
// In order to simplify the regexps that look e.g. for quoted strings, we
// remove all escaped characters (such as \' or \") from the data. Then, we
// put them back as they were.
if ($escape) {
// Remove escaped characters
$script = preg_replace_callback(
'/\\\\(.)' .'/',
'_packer_escape_char',
$script
);
$escaped = _packer_escape_char(NULL, TRUE);
}
_packer_replacement(NULL, $_regexps, $escape);
$script = preg_replace_callback(
$regexp,
'_packer_replacement',
$script
);
if ($escape) {
// Restore escaped characters
_packer_unescape_char(NULL, $escaped);
$script = preg_replace_callback(
'/\\\\' .'/',
'_packer_unescape_char',
$script
);
// We only delete portions of data afterwards to ensure the escaped character
// replacements don't go out of sync. We mark all sections to delete with
// ASCII 01 bytes.
$script = preg_replace('/\\x01[^\\x01]*\\x01/', '', $script);
}
return $script;
}
/**
* Helper function for _packer_apply().
*/
function _packer_escape_char($match, $return = FALSE) {
// Build array of escaped characters that were removed.
static $_escaped = array();
if ($return) {
$escaped = $_escaped;
$_escaped = array();
return $escaped;
}
else { $_escaped[] = $match[1];
return '\\';
}
}
/**
* Helper function for _packer_apply().
*
* Performs replacements for the multi-regexp.
*/
function _packer_replacement($arguments, $regexps = NULL, $escape = NULL) {
// Cache regexps
static $_regexps, $_escape;
if (isset($regexps)) {
$_regexps = $regexps;
}
if (isset($escape)) {
$_escape = $escape;
}
if (empty($arguments)) {
return '';
}
$i = 1; $j = 0;
// Loop through the regexps
while (isset($_regexps[$j])) {
list($expression, $replacement, $length) = $_regexps[$j++];
// Do we have a result?
if (isset($arguments[$i]) && ($arguments[$i] != '')) {
if (is_array($replacement) && isset($replacement['fn'])) {
return call_user_func('_packer_'. $replacement['fn'], $arguments, $i, $replacement['data']);
}
elseif (is_int($replacement)) {
return $arguments[$replacement + $i];
}
else {
$delete = !$escape || strpos($arguments[$i], '\\') === FALSE
? '' : "\x01" . $arguments[$i] . "\x01";
return $delete . $replacement;
}
// skip over references to sub-expressions
}
else {
$i += $length;
}
}
}
/**
* Helper function for _packer_apply().
*/
function _packer_unescape_char($match, $escaped = NULL) {
// Store array of escaped characters to insert back.
static $_escaped, $i;
if ($escaped) {
$_escaped = $escaped;
$i = 0;
}
else {
return '\\'. array_shift($_escaped);
}
}
/**
* Helper function for _packer_replacement().
*/
function _packer_backreferences($match, $offset, $data) {
$replacement = $data['replacement']; $i = $data['length'];
while ($i) {
$replacement = str_replace('$'.$i--, $match[$offset + $i], $replacement);
}
return $replacement;
}
/**
* Delete all cached JS files.
*/
function drupal_clear_js_cache() {
file_scan_directory(file_create_path('js'), '.*', array('.', '..', 'CVS'), 'file_delete', TRUE);
variable_set('javascript_parsed', array());
}
/**
* Converts a PHP variable into its Javascript equivalent.
*
* We use HTML-safe strings, i.e. with <, > and & escaped.
*/
function drupal_to_js($var) {
switch (gettype($var)) {
case 'boolean':
return $var ? 'true' : 'false'; // Lowercase necessary!
case 'integer':
case 'double':
return $var;
case 'resource':
case 'string':
return '"'. str_replace(array("\r", "\n", "<", ">", "&"),
array('\r', '\n', '\x3c', '\x3e', '\x26'),
addslashes($var)) .'"';
case 'array':
// Arrays in JSON can't be associative. If the array is empty or if it
// has sequential whole number keys starting with 0, it's not associative
// so we can go ahead and convert it as an array.
if (empty ($var) || array_keys($var) === range(0, sizeof($var) - 1)) {
$output = array();
foreach ($var as $v) {
$output[] = drupal_to_js($v);
}
return '[ '. implode(', ', $output) .' ]';
}
// Otherwise, fall through to convert the array as an object.
case 'object':
$output = array();
foreach ($var as $k => $v) {
$output[] = drupal_to_js(strval($k)) .': '. drupal_to_js($v);
}
return '{ '. implode(', ', $output) .' }';
default:
return 'null';
}
}
/**
* 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 $var
* (optional) If set, the variable will be converted to JSON and output.
*/
function drupal_json($var = NULL) {
// We are returning JavaScript, so tell the browser.
drupal_set_header('Content-Type: text/javascript; charset=utf-8');
if (isset($var)) {
echo drupal_to_js($var); }
}
/**
* Wrapper around urlencode() which avoids Apache quirks.
*
* Should be used when placing arbitrary data in an URL. Note that Drupal paths
* are urlencoded() when passed through url() and do not require urlencoding()
* of individual components.
*
* Notes:
* - For esthetic reasons, we do not escape slashes. This also avoids a 'feature'
* in Apache where it 404s on any path containing '%2F'.
* - mod_rewrite unescapes %-encoded ampersands, hashes, and slashes when clean
* URLs are used, which are interpreted as delimiters by PHP. These
* characters are double escaped so PHP will still see the encoded version.
* - With clean URLs, Apache changes '//' to '/', so every second slash is
* double escaped.
*
* @param $text
* String to encode
*/
function drupal_urlencode($text) {
if (variable_get('clean_url', '0')) {
return str_replace(array('%2F', '%26', '%23', '//'),
array('/', '%2526', '%2523', '/%252F'),
urlencode($text));
}
else {
return str_replace('%2F', '/', urlencode($text));
}
}
/**
* 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 = md5(uniqid(mt_rand(), true)) . md5(uniqid(mt_rand(), true));
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 = '') {
$private_key = drupal_get_private_key();
return md5(session_id() . $value . $private_key);
}
/**
* 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 == md5(session_id() . $value . variable_get('drupal_private_key', ''))));
}
/**
* Performs one or more XML-RPC request(s).
*
* @param $url
* An absolute URL of the XML-RPC endpoint.
* Example:
* http://www.example.com/xmlrpc.php
* @param ...
* For one request:
* The method name followed by a variable number of arguments to the method.
* For multiple requests (system.multicall):
* An array of call arrays. Each call array follows the pattern of the single
* request: method name followed by the arguments to the method.
* @return
* For one request:
* Either the return value of the method on success, or FALSE.
* If FALSE is returned, see xmlrpc_errno() and xmlrpc_error_msg().
* For multiple requests:
* An array of results. Each result will either be the result
* returned by the method called, or an xmlrpc_error object if the call
* failed. See xmlrpc_error().
*/
function xmlrpc($url) {
require_once './includes/xmlrpc.inc';
$args = func_get_args();
return call_user_func_array('_xmlrpc', $args);
}
function _drupal_bootstrap_full() {
static $called;
if ($called) {
return;
}
$called = 1;
require_once './includes/theme.inc';
require_once './includes/pager.inc';
require_once './includes/menu.inc';
require_once './includes/tablesort.inc';
require_once './includes/file.inc';
require_once './includes/unicode.inc';
require_once './includes/image.inc';
require_once './includes/form.inc';
require_once './includes/mail.inc';
require_once './includes/actions.inc';
// Set the Drupal custom error handler.
set_error_handler('drupal_error_handler');
// Emit the correct charset HTTP header.
drupal_set_header('Content-Type: text/html; charset=utf-8');
// Detect string handling method
unicode_check();
// Undo magic quotes
fix_gpc_magic();
// Load all enabled modules
module_load_all();
// Let all modules take action before menu system handles the request
module_invoke_all('init');
}
/**
* Store the current page in the cache.
*
* We try to store a gzipped version of the cache. This requires the
* PHP zlib extension (http://php.net/manual/en/ref.zlib.php). * Presence of the extension is checked by testing for the function
* gzencode. There are two compression algorithms: gzip and deflate.
* The majority of all modern browsers support gzip or both of them.
* We thus only deal with the gzip variant and unzip the cache in case
* the browser does not accept gzip encoding.
*
* @see drupal_page_header
*/
function page_set_cache() {
global $user, $base_root;
if (!$user->uid && $_SERVER['REQUEST_METHOD'] == 'GET' && count(drupal_get_messages(NULL, FALSE)) == 0) {
// This will fail in some cases, see page_get_cache() for the explanation.
if ($data = ob_get_contents()) {
$cache = TRUE;
if (function_exists('gzencode')) {
// We do not store the data in case the zlib mode is deflate.
// This should be rarely happening.
if (zlib_get_coding_type() == 'deflate') {
$cache = FALSE;
}
else if (zlib_get_coding_type() == FALSE) {
$data = gzencode($data, 9, FORCE_GZIP);
}
// The remaining case is 'gzip' which means the data is
// already compressed and nothing left to do but to store it.
}
ob_end_flush();
if ($cache && $data) {
cache_set($base_root . request_uri(), $data, 'cache_page', CACHE_TEMPORARY, drupal_get_headers());
}
}
}
}
/**
* Executes a cron run when called
* @return
* Returns TRUE if ran successfully
*/
function drupal_cron_run() {
// If not in 'safe mode', increase the maximum execution time:
if (!ini_get('safe_mode')) {
set_time_limit(240);
}
// Fetch the cron semaphore
$semaphore = variable_get('cron_semaphore', FALSE);
if ($semaphore) {
if (time() - $semaphore > 3600) {
// Either cron has been running for more than an hour or the semaphore
// was not reset due to a database error.
watchdog('cron', 'Cron has been running for more than an hour and is most likely stuck.', array(), WATCHDOG_ERROR);
// Release cron semaphore
variable_del('cron_semaphore');
}
else {
// Cron is still running normally.
watchdog('cron', 'Attempting to re-run cron while it is already running.', array(), WATCHDOG_WARNING);
}
}
else {
// Register shutdown callback
register_shutdown_function('drupal_cron_cleanup');
// Lock cron semaphore
variable_set('cron_semaphore', time());
// Iterate through the modules calling their cron handlers (if any):
module_invoke_all('cron');
// Record cron time
variable_set('cron_last', time());
watchdog('cron', 'Cron run completed.', array(), WATCHDOG_NOTICE);
// Release cron semaphore
variable_del('cron_semaphore');
// Return TRUE so other functions can check if it did run successfully
return TRUE;
}
}
/**
* 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 an array of files objects of the given type from the site-wide
* directory (i.e. modules/), the all-sites directory (i.e.
* sites/all/modules/), the profiles directory, and site-specific directory
* (i.e. sites/somesite/modules/). The returned array will be keyed using the
* key specified (name, basename, filename). Using name or basename will cause
* site-specific files to be prioritized over similar files in the default
* directories. That is, if a file with the same name appears in both the
* site-wide directory and site-specific directory, only the site-specific
* version will be included.
*
* @param $mask
* The regular expression of the files to find.
* @param $directory
* The subdirectory name in which the files are found. For example,
* 'modules' will search in both modules/ and
* sites/somesite/modules/.
* @param $key
* The key to be passed to file_scan_directory().
* @param $min_depth
* Minimum depth of directories to return files from.
*
* @return
* An array of file objects of the specified type.
*/
function drupal_system_listing($mask, $directory, $key = 'name', $min_depth = 1) {
global $profile;
$config = conf_path();
// 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
// $profile variable. At all other times, the standard Drupal systems variable
// table contains the name of the current profile, and we can call variable_get()
// to determine what one is active.
if (!isset($profile)) {
$profile = variable_get('install_profile', 'default');
}
$searchdir = array($directory);
$files = array();
// Always search sites/all/* as well as the global directories
$searchdir[] = 'sites/all/'. $directory;
// The 'profiles' directory contains pristine collections of modules and
// themes as organized by a distribution. It is pristine in the same way
// that /modules is pristine for core; users should avoid changing anything
// there in favor of sites/all or sites/<domain> directories.
if (file_exists("profiles/$profile/$directory")) {
$searchdir[] = "profiles/$profile/$directory";
}
if (file_exists("$config/$directory")) {
$searchdir[] = "$config/$directory";
}
// Get current list of items
foreach ($searchdir as $dir) {
$files = array_merge($files, file_scan_directory($dir, $mask, array('.', '..', 'CVS'), 0, TRUE, $key, $min_depth));
}
return $files;
}
/**
* This dispatch function hands off structured Drupal arrays to
* type-specific *_alter implementations. It ensures a consistent
* interface for all altering operations.
*
* @param $type
* The data type of the structured array. 'form', 'links',
* 'node_content', and so on are several examples.
* @param $data
* The structured array to be altered.
* @param ...
* Any additional params will be passed on to the called
* hook_$type_alter functions.
*/
function drupal_alter($type, &$data) {
// Hang onto a reference to the data array so that it isn't blown away later.
$args = array(&$data);
// Now, use func_get_args() to pull in any additional parameters passed into
// the drupal_alter() call.
$additional_args = func_get_args();
array_shift($additional_args);
array_shift($additional_args);
$args = array_merge($args, $additional_args);
foreach (module_implements($type .'_alter') as $module) {
$function = $module .'_'. $type .'_alter';
call_user_func_array($function, $args);
}
}
/**
* Renders HTML given a structured array tree. Recursively iterates over each
* of the array elements, generating HTML code. This function is usually
* called from within a another function, like drupal_get_form() or node_view().
*
* @param $elements
* The structured array describing the data to be rendered.
* @return
* The rendered HTML.
*/
function drupal_render(&$elements) {
if (!isset($elements) || (isset($elements['#access']) && !$elements['#access'])) {
return NULL;
}
// If the default values for this element haven't been loaded yet, populate // them.
if (!isset($elements['#defaults_loaded']) || !$elements['#defaults_loaded']) {
if ((!empty($elements['#type'])) && ($info = _element_info($elements['#type']))) {
$elements += $info;
}
}
// 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);
}
}
}
$content = '';
// Either the elements did not go through form_builder or one of the children
// has a #weight.
if (!isset($elements['#sorted'])) {
uasort($elements, "_element_sort");
}
$elements += array('#title' => NULL, '#description' => NULL);
if (!isset($elements['#children'])) {
$children = element_children($elements);
/* Render all the children that use a theme function */
if (isset($elements['#theme']) && empty($elements['#theme_used'])) {
$elements['#theme_used'] = TRUE;
$previous = array();
foreach (array('#value', '#type', '#prefix', '#suffix') as $key) {
$previous[$key] = isset($elements[$key]) ? $elements[$key] : NULL;
}
// If we rendered a single element, then we will skip the renderer.
if (empty($children)) {
$elements['#printed'] = TRUE;
}
else {
$elements['#value'] = '';
}
$elements['#type'] = 'markup';
unset($elements['#prefix'], $elements['#suffix']);
$content = theme($elements['#theme'], $elements);
foreach (array('#value', '#type', '#prefix', '#suffix') as $key) {
$elements[$key] = isset($previous[$key]) ? $previous[$key] : NULL;
}
}
/* render each of the children using drupal_render and concatenate them */
if (!isset($content) || $content === '') {
foreach ($children as $key) {
$content .= drupal_render($elements[$key]);
}
}
}
if (isset($content) && $content !== '') {
$elements['#children'] = $content;
}
// Until now, we rendered the children, here we render the element itself
if (!isset($elements['#printed'])) {
$content = theme(!empty($elements['#type']) ? $elements['#type'] : 'markup', $elements);
$elements['#printed'] = TRUE;
}
if (isset($content) && $content !== '') {
// 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)) {
$content = $function($content, $elements);
}
}
}
$prefix = isset($elements['#prefix']) ? $elements['#prefix'] : '';
$suffix = isset($elements['#suffix']) ? $elements['#suffix'] : '';
return $prefix . $content . $suffix;
}
}
/**
* Function used by uasort in drupal_render() to sort structured arrays
* by weight.
*/
function _element_sort($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 < $b_weight) ? -1 : 1;
}
/**
* Check if the key is a property.
*/
function element_property($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]) || $key[0] != '#';
}
/**
* Get keys of a structured array tree element that are not properties
* (i.e., do not begin with '#').
*/
function element_children($element) {
return array_filter(array_keys((array) $element), 'element_child');
}
/**
* Provide theme registration for themes across .inc files.
*/
function drupal_common_themes() {
return array(
// theme.inc
'placeholder' => array(
'arguments' => array('text' => NULL)
),
'page' => array(
'arguments' => array('content' => NULL, 'show_blocks' => TRUE, 'show_messages' => TRUE),
'template' => 'page',
), 'maintenance_page' => array(
'arguments' => array('content' => NULL, 'show_messages' => TRUE),
),
'install_page' => array(
'arguments' => array('content' => NULL),
),
'task_list' => array(
'arguments' => array('items' => NULL, 'active' => NULL),
),
'status_messages' => array(
'arguments' => array('display' => NULL),
),
'links' => array(
'arguments' => array('links' => NULL, 'attributes' => array('class' => 'links')),
),
'image' => array(
'arguments' => array('path' => NULL, 'alt' => '', 'title' => '', 'attributes' => NULL, 'getsize' => TRUE),
),
'breadcrumb' => array(
'arguments' => array('breadcrumb' => NULL),
),
'help' => array(
'arguments' => array(),
),
'submenu' => array(
'arguments' => array('links' => NULL),
),
'table' => array(
'arguments' => array('header' => NULL, 'rows' => NULL, 'attributes' => array(), 'caption' => NULL),
),
'table_select_header_cell' => array(
'arguments' => array(),
),
'tablesort_indicator' => array(
'arguments' => array('style' => NULL),
),
'box' => array(
'arguments' => array('title' => NULL, 'content' => NULL, 'region' => 'main'),
'template' => 'box',
),
'block' => array(
'arguments' => array('block' => NULL),
'template' => 'block',
),
'mark' => array(
'arguments' => array('type' => MARK_NEW),
),
'item_list' => array(
'arguments' => array('items' => array(), 'title' => NULL, 'type' => 'ul', 'attributes' => NULL),
),
'more_help_link' => array(
'arguments' => array('url' => NULL),
),
'xml_icon' => array(
'arguments' => array('url' => NULL),
),
'feed_icon' => array(
'arguments' => array('url' => NULL, 'title' => NULL),
),
'closure' => array(
'arguments' => array('main' => 0),
),
'blocks' => array(
'arguments' => array('region' => NULL),
),
'username' => array(
'arguments' => array('object' => NULL),
),
'progress_bar' => array(
'arguments' => array('percent' => NULL, 'message' => NULL), ),
// from pager.inc
'pager' => array(
'arguments' => array('tags' => array(), 'limit' => 10, 'element' => 0, 'parameters' => array()),
),
'pager_first' => array(
'arguments' => array('text' => NULL, 'limit' => NULL, 'element' => 0, 'parameters' => array()),
),
'pager_previous' => array(
'arguments' => array('text' => NULL, 'limit' => NULL, 'element' => 0, 'interval' => 1, 'parameters' => array()),
),
'pager_next' => array(
'arguments' => array('text' => NULL, 'limit' => NULL, 'element' => 0, 'interval' => 1, 'parameters' => array()),
),
'pager_last' => array(
'arguments' => array('text' => NULL, 'limit' => NULL, 'element' => 0, 'parameters' => array()),
),
'pager_link' => array(
'arguments' => array('text' => NULL, 'page_new' => NULL, 'element' => NULL, 'parameters' => array(), 'attributes' => array()),
),
// from locale.inc
'locale_admin_manage_screen' => array(
'arguments' => array('form' => NULL),
),
// from menu.inc
'menu_item_link' => array(
'arguments' => array('item' => NULL),
),
'menu_tree' => array(
'arguments' => array('tree' => NULL),
),
'menu_item' => array(
'arguments' => array('link' => NULL, 'has_children' => NULL, 'menu' => ''),
),
'menu_local_task' => array(
'arguments' => array('link' => NULL, 'active' => FALSE),
),
'menu_local_tasks' => array(
'arguments' => array(),
),
// from form.inc
'select' => array(
'arguments' => array('element' => NULL),
),
'fieldset' => array(
'arguments' => array('element' => NULL),
),
'radio' => array(
'arguments' => array('element' => NULL),
),
'radios' => array(
'arguments' => array('element' => NULL),
),
'password_confirm' => array(
'arguments' => array('element' => NULL),
),
'date' => array(
'arguments' => array('element' => NULL),
),
'item' => array(
'arguments' => array('element' => NULL),
),
'checkbox' => array(
'arguments' => array('element' => NULL),
),
'checkboxes' => array(
'arguments' => array('element' => NULL),
),
'submit' => array(
'arguments' => array('element' => NULL), ),
'button' => array(
'arguments' => array('element' => NULL),
),
'image_button' => array(
'arguments' => array('element' => NULL),
),
'hidden' => array(
'arguments' => array('element' => NULL),
),
'token' => array(
'arguments' => array('element' => NULL),
),
'textfield' => array(
'arguments' => array('element' => NULL),
),
'form' => array(
'arguments' => array('element' => NULL),
),
'textarea' => array(
'arguments' => array('element' => NULL),
),
'markup' => array(
'arguments' => array('element' => NULL),
),
'password' => array(
'arguments' => array('element' => NULL),
),
'file' => array(
'arguments' => array('element' => NULL),
),
'form_element' => array(
'arguments' => array('element' => NULL, 'value' => NULL),
),
);
}
/**
* @ingroup schemaapi
* @{
*/
/**
* Get the schema definition of a table, or the whole database schema.
* The returned schema will include any modifications made by any
* module that implements hook_schema_alter().
*
* @param $name
* The name of the table. If not given, the schema of all tables is returned.
* @param $rebuild
* If true, the schema will be rebuilt instead of retrieved from the cache.
*/
function drupal_get_schema($name = NULL, $rebuild = FALSE) {
static $schema = array();
if (empty($schema) || $rebuild) {
// Try to load the schema from cache.
if (!$rebuild && $cached = cache_get('schema')) {
$schema = $cached->data;
}
// Otherwise, rebuild the schema cache.
else {
// Load the .schema files.
module_load_all_includes('schema');
// Invoke hook_schema for all modules.
foreach (module_implements('schema') as $module) {
$current = module_invoke($module, 'schema');
_drupal_initialize_schema($module, $current);
$schema = array_merge($current, $schema); }
drupal_alter('schema', $schema);
cache_set('schema', $schema);
}
}
if (!isset($name)) {
return $schema;
}
elseif (isset($schema[$name])) {
return $schema[$name];
}
else {
return FALSE;
}
}
/**
* Create 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 $module
* The module for which the tables will be created.
*/
function drupal_install_schema($module) {
$schema = drupal_get_schema_unprocessed($module);
_drupal_initialize_schema($module, $schema);
$ret = array();
foreach ($schema as $name => $table) {
db_create_table($ret, $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 $module
* The module for which the tables will be removed.
*/
function drupal_uninstall_schema($module) {
$schema = drupal_get_schema_unprocessed($module);
_drupal_initialize_schema($module, $schema);
$ret = array();
foreach ($schema as $table) {
db_drop_table($ret, $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 .schema file.
module_load_include('schema', $module);
$schema = module_invoke($module, 'schema');
if (!is_null($table) && isset($schema[$table])) {
return $schema[$table];
}
else {
return $schema;
}
}
/**
* Fill in required default values for table definitions returned by
* hook_schema().
*
* @param $module
* The module for which hook_schema() was invoked.
* @param $schema
* The schema definition array as it was returned by the module's
* hook_schema().
*/
function _drupal_initialize_schema($module, &$schema) {
// Set the name and module key for all tables.
foreach ($schema as $name => $table) {
if (empty($table['module'])) {
$schema[$name]['module'] = $module;
}
if (!isset($table['name'])) {
$schema[$name]['name'] = $name;
}
}
}
/**
* @} End of "ingroup schemaapi".
*/
/**
* Parse Drupal info file format.
*
* Files should use an ini-like format to specify values.
* White-space generally doesn't matter, except inside values.
* e.g.
*
* @verbatim
* key = value
* key = "value"
* key = 'value'
* key = "multi-line
*
* value"
* key = 'multi-line
*
* value'
* key
* = * 'value'
* @endverbatim
*
* Arrays are created using a GET-like syntax:
*
* @verbatim
* key[] = "numeric array"
* key[index] = "associative array"
* key[index][] = "nested numeric array"
* key[index][index] = "nested associative array"
* @endverbatim
*
* 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.
*
* This function is NOT for placing arbitrary module-specific settings. Use
* variable_get() and variable_set() for that.
*
* Information stored in the 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 depends on.
* - package: The name of the package of modules this module belongs to.
*
* Example of .info file:
* @verbatim
* name = Forum
* description = Enables threaded discussions about general topics.
* dependencies[] = taxonomy
* dependencies[] = comment
* package = Core - optional
* version = VERSION
* @endverbatim
*
* @param $filename
* The file we are parsing. Accepts file with relative or absolute path.
* @return
* The info array.
*/
function drupal_parse_info_file($filename) {
$info = array();
if (!file_exists($filename)) {
return $info;
}
$data = file_get_contents($filename);
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[$key];
}
// Handle PHP constants
if (defined($value)) {
$value = constant($value);
}
// Insert actual value
if ($last == '') {
$last = count($parent);
}
$parent[$last] = $value;
}
}
return $info;
}
/**
* @return
* Array of the possible severity levels for log messages.
*
* @see watchdog
*/
function watchdog_severity_levels() {
return array(
WATCHDOG_EMERG => t('emergency'),
WATCHDOG_ALERT => t('alert'),
WATCHDOG_CRITICAL => t('critical'),
WATCHDOG_ERROR => t('error'),
WATCHDOG_WARNING => t('warning'),
WATCHDOG_NOTICE => t('notice'),
WATCHDOG_INFO => t('info'),
WATCHDOG_DEBUG => t('debug'),
);
}
/**
* Explode a string of given tags into an array.
*/
function drupal_explode_tags($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 $tags;
}
/**
* Implode an array of tags into a string.
*/
function drupal_implode_tags($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);
}