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common.inc 125.75 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.
*
* This function can be called as long the HTML header hasn't been sent.
*
* @param $url
* A 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 $delimiter
* A delimiter to split feeds by.
*/
function drupal_get_feeds($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 $parent
* Should not be passed, only used in recursive calls.
* @return
* An urlencoded string which can be appended to/as the URL query string.
*/
function drupal_query_string_encode($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
* destination in either the $_REQUEST-array (i.e. by using
* the query string of an URI) 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.
*
* Drupal will ensure that messages set by drupal_set_message() and other
* session data are written to the database before the user is redirected.
*
* This function ends the request; use it rather than a print theme('page')
* statement in your menu callback.
*
* @param $path
* A Drupal path or a full URL.
* @param $query * A query string component, if any.
* @param $fragment
* A destination fragment identifier (named anchor).
* @param $http_response_code
* Valid values for an actual "goto" as per RFC 2616 section 10.3 are:
* - 301 Moved Permanently (the recommended value for most redirects)
* - 302 Found (default in Drupal and PHP, sometimes used for spamming search
* engines)
* - 303 See Other
* - 304 Not Modified
* - 305 Use Proxy
* - 307 Temporary Redirect (alternative to "503 Site Down for Maintenance")
* Note: Other values are defined by RFC 2616, but are rarely used and poorly
* supported.
* @see drupal_get_destination()
*/
function drupal_goto($path = '', $query = NULL, $fragment = NULL, $http_response_code = 302) {
if (isset($_REQUEST['destination'])) {
extract(parse_url(urldecode($_REQUEST['destination'])));
}
$url = url($path, array('query' => $query, 'fragment' => $fragment, 'absolute' => TRUE));
// Remove newlines from the URL to avoid header injection attacks.
$url = str_replace(array("\n", "\r"), '', $url);
// Allow modules to react to the end of the page request before redirecting.
// We do not want this while running update.php.
if (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') {
module_invoke_all('exit', $url);
}
// Even though session_write_close() is registered as a shutdown function, we
// need all session data written to the database before redirecting.
session_write_close();
header('Location: ' . $url, TRUE, $http_response_code);
// The "Location" header sends a redirect status code to the HTTP daemon. In
// some cases this can be wrong, so we make sure none of the code below the
// drupal_goto() call gets executed upon redirection.
exit();
}
/**
* Generates a site offline message.
*/
function drupal_site_offline() {
drupal_maintenance_theme();
drupal_set_header($_SERVER['SERVER_PROTOCOL'] . ' 503 Service unavailable');
drupal_set_title(t('Site offline'));
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($_SERVER['SERVER_PROTOCOL'] . ' 404 Not Found');
watchdog('page not found', check_plain($_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) || $return == MENU_NOT_FOUND || $return == MENU_ACCESS_DENIED) {
drupal_set_title(t('Page not found'));
$return = t('The requested page could not be found.');
}
// To conserve CPU and bandwidth, omit the blocks.
print theme('page', $return, FALSE);
}
/**
* Generates a 403 error if the request is not allowed.
*/
function drupal_access_denied() {
drupal_set_header($_SERVER['SERVER_PROTOCOL'] . ' 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) || $return == MENU_NOT_FOUND || $return == MENU_ACCESS_DENIED) {
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) {
global $db_prefix;
static $self_test = FALSE;
$result = new stdClass();
// Try to clear the drupal_http_request_fails variable if it's set. We
// can't tie this call to any error because there is no surefire way to
// tell whether a request has failed, so we add the check to places where // some parsing has failed.
if (!$self_test && variable_get('drupal_http_request_fails', FALSE)) {
$self_test = TRUE;
$works = module_invoke('system', 'check_http_request');
$self_test = FALSE;
if (!$works) {
// Do not bother with further operations if we already know that we
// have no chance.
$result->error = t("The server can't issue HTTP requests");
return $result;
}
}
// Parse the URL and make sure we can handle the schema.
$uri = @parse_url($url);
if ($uri == FALSE) {
$result->error = 'unable to parse URL';
return $result;
}
if (!isset($uri['scheme'])) {
$result->error = 'missing schema';
return $result;
}
switch ($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 when PHP is compiled with OpenSSL support.
$port = isset($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 use a negative number so it does not
// 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)
);
// If the server url has a user then attempt to use basic authentication
if (isset($uri['user'])) { $defaults['Authorization'] = 'Authorization: Basic ' . base64_encode($uri['user'] . (!empty($uri['pass']) ? ":" . $uri['pass'] : ''));
}
// If the database prefix is being used by SimpleTest to run the tests in a copied
// database then set the user-agent header to the database prefix so that any
// calls to other Drupal pages will run the SimpleTest prefixed database. The
// user-agent is used to ensure that multiple testing sessions running at the
// same time won't interfere with each other as they would if the database
// prefix were stored statically in a file or database variable.
if (preg_match("/simpletest\d+/", $db_prefix, $matches)) {
$headers['User-Agent'] = $matches[0];
}
foreach ($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) {
$result = drupal_http_request($location, $headers, $method, $data, --$retry);
$result->redirect_code = $code;
}
$result->redirect_url = $location;
break;
default:
$result->error = $text;
}
$result->code = $code;
return $result;
}
/**
* @} End of "HTTP handling".
*/
/**
* Custom PHP error handler.
*
* @param $error_level
* The level of the error raised.
* @param $message
* The error message.
* @param $filename
* The filename that the error was raised in.
* @param $line
* The line number the error was raised at.
* @param $context
* An array that points to the active symbol table at the point the error occurred.
*/
function _drupal_error_handler($error_level, $message, $filename, $line, $context) {
if ($error_level & error_reporting()) {
// All these constants are documented at http://php.net/manual/en/errorfunc.constants.php
$types = array(
E_ERROR => 'Error',
E_WARNING => 'Warning',
E_PARSE => 'Parse error',
E_NOTICE => 'Notice',
E_CORE_ERROR => 'Core error',
E_CORE_WARNING => 'Core warning',
E_COMPILE_ERROR => 'Compile error',
E_COMPILE_WARNING => 'Compile warning',
E_USER_ERROR => 'User error',
E_USER_WARNING => 'User warning',
E_USER_NOTICE => 'User notice',
E_STRICT => 'Strict warning',
E_RECOVERABLE_ERROR => 'Recoverable fatal error'
);
$backtrace = debug_backtrace();
// We treat recoverable errors as fatal.
_drupal_log_error(isset($types[$error_level]) ? $types[$error_level] : 'Unknown error', $message, $backtrace, $error_level == E_RECOVERABLE_ERROR);
}
}
/**
* Custom PHP exception handler.
*
* Uncaught exceptions are those not enclosed in a try/catch block. They are
* always fatal: the execution of the script will stop as soon as the exception
* handler exits.
* * @param $exception
* The exception object that was thrown.
*/
function _drupal_exception_handler($exception) {
$backtrace = $exception->getTrace();
// Add the line throwing the exception to the backtrace.
array_unshift($backtrace, array('line' => $exception->getLine(), 'file' => $exception->getFile()));
// For PDOException errors, we try to return the initial caller,
// skipping internal functions of the database layer.
if ($exception instanceof PDOException) {
// The first element in the stack is the call, the second element gives us the caller.
// We skip calls that occurred in one of the classes of the database layer
// or in one of its global functions.
$db_functions = array('db_query', 'pager_query', 'db_query_range', 'db_query_temporary', 'update_sql');
while (($caller = $backtrace[1]) &&
((isset($caller['class']) && (strpos($caller['class'], 'Query') !== FALSE || strpos($caller['class'], 'Database') !== FALSE)) ||
in_array($caller['function'], $db_functions))) {
// We remove that call.
array_shift($backtrace);
}
}
// Log the message to the watchdog and return an error page to the user.
_drupal_log_error(get_class($exception), $exception->getMessage(), $backtrace, TRUE);
}
/**
* Log a PHP error or exception, display an error page in fatal cases.
*
* @param $type
* The type of the error (Error, Warning, ...).
* @param $message
* The message associated to the error.
* @param $backtrace
* The backtrace of function calls that led to this error.
* @param $fatal
* TRUE if the error is fatal.
*/
function _drupal_log_error($type, $message, $backtrace, $fatal) {
$caller = _drupal_get_last_caller($backtrace);
// Initialize a maintenance theme early if the boostrap was not complete.
// Do it early because drupal_set_message() triggers an init_theme().
if ($fatal && (drupal_get_bootstrap_phase() != DRUPAL_BOOTSTRAP_FULL)) {
unset($GLOBALS['theme']);
if (!defined('MAINTENANCE_MODE')) {
define('MAINTENANCE_MODE', 'error');
}
drupal_maintenance_theme();
}
// When running inside the testing framework, we relay the errors
// to the tested site by the way of HTTP headers.
if (preg_match("/^simpletest\d+/", $GLOBALS['db_prefix']) && !headers_sent() && !defined('SIMPLETEST_DONT_COLLECT_ERRORS')) {
static $number = 0;
$assertion = array(
$message,
$type,
$caller
);
header('X-Drupal-Assertion-' . $number . ': ' . rawurlencode(serialize($assertion)));
$number++;
}
// Force display of error messages in update.php.
if (variable_get('error_level', 1) == 1 || (defined('MAINTENANCE_MODE') && MAINTENANCE_MODE == 'update')) {
drupal_set_message(t('@type: %message in %function (line %line of %file).', array('@type' => $type, '%message' => $message, '%function' => $caller['function'], '%line' => $caller['line'], '%file' => $caller['file'])), 'error');
}
watchdog('php', '%type: %message in %function (line %line of %file).', array('%type' => $type, '%message' => $message, '%function' => $caller['function'], '%file' => $caller['file'], '%line' => $caller['line']), WATCHDOG_ERROR);
if ($fatal) {
drupal_set_header($_SERVER['SERVER_PROTOCOL'] . ' Service unavailable');
drupal_set_title(t('Error'));
if (drupal_get_bootstrap_phase() == DRUPAL_BOOTSTRAP_FULL) {
print theme('page', t('The website encountered an unexpected error. Please try again later.'), FALSE);
}
else {
print theme('maintenance_page', t('The website encountered an unexpected error. Please try again later.'), FALSE);
}
exit;
}
}
/**
* Gets the last caller from a backtrace.
*
* @param $backtrace
* A standard PHP backtrace.
* @return
* An associative array with keys 'file', 'line' and 'function'.
*/
function _drupal_get_last_caller($backtrace) {
// Errors that occur inside PHP internal functions
// do not generate information about file and line.
while ($backtrace && !isset($backtrace[0]['line'])) {
array_shift($backtrace);
}
// The first trace is the call itself.
// It gives us the line and the file of the last call.
$call = $backtrace[0];
// The second call give us the function where the call originated.
if (isset($backtrace[1])) {
if (isset($backtrace[1]['class'])) {
$call['function'] = $backtrace[1]['class'] . $backtrace[1]['type'] . $backtrace[1]['function'] . '()';
}
else {
$call['function'] = $backtrace[1]['function'] . '()';
}
}
else {
$call['function'] = 'main()';
}
return $call;
}
function _fix_gpc_magic(&$item) {
if (is_array($item)) {
array_walk($item, '_fix_gpc_magic');
}
else {
$item = stripslashes($item);
}
}
/**
* Helper function to strip slashes from $_FILES skipping over the tmp_name keys
* since PHP generates single backslashes for file paths on Windows systems.
*
* tmp_name does not have backslashes added see
* http://php.net/manual/en/features.file-upload.php#42280
*/
function _fix_gpc_magic_files(&$item, $key) {
if ($key != 'tmp_name') {
if (is_array($item)) {
array_walk($item, '_fix_gpc_magic_files');
} else {
$item = stripslashes($item);
}
}
}
/**
* Fix double-escaping problems caused by "magic quotes" in some PHP installations.
*/
function fix_gpc_magic() {
static $fixed = FALSE;
if (!$fixed && ini_get('magic_quotes_gpc')) {
array_walk($_GET, '_fix_gpc_magic');
array_walk($_POST, '_fix_gpc_magic');
array_walk($_COOKIE, '_fix_gpc_magic');
array_walk($_REQUEST, '_fix_gpc_magic');
array_walk($_FILES, '_fix_gpc_magic_files');
$fixed = TRUE;
}
}
/**
* Translate strings to the page language or a given language.
*
* All human-readable text that will be displayed somewhere within a page should
* be run through the t() function.
*
* Examples:
* @code
* if (!$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 escape 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)), PASS_THROUGH);
* @endcode
*
* - %variable, which indicates that the string should be HTML escaped and
* 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 are embedded links; link titles add a
* context for translators, so should be kept in the main string.
*
* Here is an example of incorrect usage of 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 $custom_strings;
if (!isset($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]) {
case '@':
// Escaped only.
$args[$key] = check_plain($value);
break;
case '%':
default:
// Escaped and placeholder.
$args[$key] = theme('placeholder', $value);
break;
case '!':
// Pass-through.
}
}
return strtr($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) {
return (bool)filter_var($mail, FILTER_VALIDATE_EMAIL);
}
/**
* Verify the syntax of the given URL.
*
* This function should only be used on actual URLs. It should not be used for
* Drupal menu paths, which can contain arbitrary characters.
*
* @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 (bool)preg_match("/^(http|https|ftp):\/\/" . $allowed_characters . "+$/i", $url);
}
else {
return (bool)preg_match("/^" . $allowed_characters . "+$/i", $url);
}
}
/**
* @} End of "defgroup validation".
*/
/**
* Register an event for the current visitor (hostname/IP) to the flood control mechanism.
*
* @param $name
* The name of an event.
*/
function flood_register_event($name) {
db_insert('flood')
->fields(array(
'event' => $name,
'hostname' => ip_address(),
'timestamp' => REQUEST_TIME,
))
->execute();
}
/**
* 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_query("SELECT COUNT(*) FROM {flood} WHERE event = :event AND hostname = :hostname AND timestamp > :timestamp", array(
':event' => $name,
':hostname' => ip_address(),
':timestamp' => REQUEST_TIME - 3600))
->fetchField();
return ($number < $threshold);
}
function check_file($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 (isset($value['value']) && $value['value'] != '') {
$output .= '>' . (is_array($value['value']) ? format_xml_elements($value['value']) : check_plain($value['value'])) . '</' . $value['key'] . ">\n";
}
else {
$output .= " />\n";
}
}
}
else {
$output .= ' <' . $key . '>' . (is_array($value) ? format_xml_elements($value) : check_plain($value)) . "</$key>\n";
}
}
return $output;
}
/**
* Format a string containing a count of items.
*
* This function ensures that the string is pluralized correctly. Since t() is
* called by this function, make sure not to pass already-localized strings to
* it.
*
* For example:
* @code
* $output = format_plural($node->comment_count, '1 comment', '@count comments');
* @endcode
*
* Example with additional replacements:
* @code
* $output = format_plural($update_count,
* 'Changed the content type of 1 post from %old-type to %new-type.',
* 'Changed the content type of @count posts from %old-type to %new-type.',
* array('%old-type' => $info->old_type, '%new-type' => $info->new_type)));
* @endcode
*
* @param $count
* The item count to display.
* @param $singular
* The string for the singular case. Please make sure it is clear this is
* singular, to ease translation (e.g. use "1 new comment" instead of "1 new").
* Do not use @count in the singular string.
* @param $plural
* The string for the plural case. Please make sure it is clear this is plural,
* to ease translation. Use @count in place of the item count, as in "@count
* new comments".
* @param $args
* An associative array of replacements to make after translation. Incidences
* of any key in this array are replaced with the corresponding value.
* Based on the first character of the key, the value is escaped and/or themed:
* - !variable: inserted as is
* - @variable: escape plain text to HTML (check_plain)
* - %variable: escape text and theme as a placeholder for user-submitted
* content (check_plain + 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, $langcode) : -1;
// Backwards compatibility.
if ($index < 0) {
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 $size
* A size expressed as a number of bytes with optional SI size and unit
* suffix (e.g. 2, 3K, 5MB, 10G).
* @return
* An integer representation of the size.
*/
function parse_size($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
* A size in bytes.
* @param $langcode
* Optional language code to translate to a language other than what is used
* to display the page.
* @return
* A translated string representation of the size.
*/
function format_size($size, $langcode = NULL) {
if ($size < 1000) {
return format_plural($size, '1 byte', '@count bytes', array(), $langcode);
}
else {
$size = $size / 1000; // convert bytes to kilobytes (1000 bytes)
$units = array(
t('@size KB', array(), $langcode),
t('@size MB', array(), $langcode),
t('@size GB', array(), $langcode),
t('@size TB', array(), $langcode),
t('@size PB', array(), $langcode),
t('@size EB', array(), $langcode),
t('@size ZB', array(), $langcode),
t('@size YB', array(), $langcode),
);
foreach ($units as $unit) {
if (round($size, 2) >= 1000) {
$size = $size / 1000;
}
else {
break;
}
}
return str_replace('@size', round($size, 2), $unit);
}
}
/**
* Format a time interval with the requested granularity.
*
* @param $timestamp
* The length of the interval in seconds.
* @param $granularity
* How many different units to display in the string.
* @param $langcode * Optional language code to translate to a language other than
* what is used to display the page.
* @return
* A translated string representation of the interval.
*/
function format_interval($timestamp, $granularity = 2, $langcode = NULL) {
$units = array('1 year|@count years' => 31536000, '1 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(), $langcode);
}
elseif ($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));
}
elseif (strpos('BdgGhHiIjLmnsStTUwWYyz', $c) !== FALSE) {
$date .= gmdate($c, $timestamp);
}
elseif ($c == 'r') {
$date .= format_date($timestamp - $timezone, 'custom', 'D, d M Y H:i:s O', $timezone, $langcode);
}
elseif ($c == 'O') {
$date .= sprintf('%s%02d%02d', ($timezone < 0 ? '-' : '+'), abs($timezone / 3600), abs($timezone % 3600) / 60);
}
elseif ($c == 'Z') {
$date .= $timezone;
}
elseif ($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/". The special path
* '<front>' may also be given and will generate the site's base URL.
* @param $options
* An associative array of additional options, with the following keys:
* - 'query'
* A query string to append to the link, or an array of query key/value
* properties.
* - 'fragment'
* A fragment identifier (or named anchor) to append to the link.
* Do not include the '#' character.
* - 'absolute' (default FALSE)
* Whether to force the output to be an absolute link (beginning with
* http:). Useful for links that will be displayed outside the site, such
* as in an RSS feed.
* - 'alias' (default FALSE)
* Whether the given path is an alias already.
* - 'external'
* Whether the given path is an external URL.
* - 'language'
* An optional language object. Used to build the URL to link to and * look up the proper alias for the link.
* - 'base_url'
* Only used internally, to modify the base URL when a language dependent
* URL requires so.
* - 'prefix'
* Only used internally, to modify the path when a language dependent URL
* requires so.
* @return
* A string containing a URL to the given path.
*
* When creating links in modules, consider whether l() could be a better
* alternative than url().
*/
function url($path = NULL, array $options = array()) {
// Merge in defaults.
$options += array(
'fragment' => '',
'query' => '',
'absolute' => FALSE,
'alias' => FALSE,
'prefix' => ''
);
if (!isset($options['external'])) {
// 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, ':');
$options['external'] = ($colonpos !== FALSE && !preg_match('![/?#]!', substr($path, 0, $colonpos)) && filter_xss_bad_protocol($path, FALSE) == check_plain($path));
}
// May need language dependent rewriting if language.inc is present.
if (function_exists('language_url_rewrite')) {
language_url_rewrite($path, $options);
}
if ($options['fragment']) {
$options['fragment'] = '#' . $options['fragment'];
}
if (is_array($options['query'])) {
$options['query'] = drupal_query_string_encode($options['query']);
}
if ($options['external']) {
// Split off the fragment.
if (strpos($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)) { $clean_url = (bool)variable_get('clean_url', '0');
}
if (!isset($options['base_url'])) {
// The base_url might be rewritten from the language rewrite in domain mode.
$options['base_url'] = $base_url;
}
// Preserve the original path before aliasing.
$original_path = $path;
// The special path '<front>' links to the default front page.
if ($path == '<front>') {
$path = '';
}
elseif (!empty($path) && !$options['alias']) {
$path = drupal_get_path_alias($path, isset($options['language']) ? $options['language']->language : '');
}
if (function_exists('custom_url_rewrite_outbound')) {
// Modules may alter outbound links by reference.
custom_url_rewrite_outbound($path, $options, $original_path);
}
$base = $options['absolute'] ? $options['base_url'] . '/' : base_path();
$prefix = empty($path) ? rtrim($options['prefix'], '/') : $options['prefix'];
$path = drupal_urlencode($prefix . $path);
if ($clean_url) {
// With Clean URLs.
if ($options['query']) {
return $base . $path . '?' . $options['query'] . $options['fragment'];
}
else {
return $base . $path . $options['fragment'];
}
}
else {
// Without Clean URLs.
$variables = array();
if (!empty($path)) {
$variables[] = 'q=' . $path;
}
if (!empty($options['query'])) {
$variables[] = $options['query'];
}
if ($query = join('&', $variables)) {
return $base . $script . '?' . $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 '<front>', it generates a link to the site's
* base URL (again via the url() function).
* - 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, array $options = array()) {
// Merge in defaults.
$options += array(
'attributes' => array(),
'html' => FALSE,
);
// Append active class.
if ($path == $_GET['q'] || ($path == '<front>' && drupal_is_front_page())) {
if (isset($options['attributes']['class'])) {
$options['attributes']['class'] .= ' active';
}
else {
$options['attributes']['class'] = 'active';
}
}
// Remove all HTML and PHP tags from a tooltip. For best performance, we act only
// if a quick strpos() pre-check gave a suspicion (because strip_tags() is expensive).
if (isset($options['attributes']['title']) && strpos($options['attributes']['title'], '<') !== FALSE) {
$options['attributes']['title'] = strip_tags($options['attributes']['title']);
}
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', CACHE_DISABLED) != CACHE_DISABLED) {
page_set_cache();
}
module_invoke_all('exit');
module_implements(MODULE_IMPLEMENTS_WRITE_CACHE);
registry_cache_path_files();
}
/**
* Form an associative array from a linear array.
*
* This function walks through the provided array and constructs an associative
* array out of it. The keys of the resulting array will be the values of the
* input array. The values will be the same as the keys unless a function is
* specified, in which case the output of the function is used for the values
* instead.
*
* @param $array
* A linear array.
* @param $function
* A name of a function to apply to all values before output.
* @result
* An associative array.
*/
function drupal_map_assoc($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) {
global $theme_path, $theme_info, $conf;
// Store current theme path.
$old_theme_path = $theme_path;
// Restore theme_path to the theme, as long as drupal_eval() executes,
// so code evaluted will not see the caller module as the current theme.
// If theme info is not initialized get the path from theme_default.
if (!isset($theme_info)) {
$theme_path = drupal_get_path('theme', $conf['theme_default']);
}
else {
$theme_path = dirname($theme_info->filename);
}
ob_start();
print eval('?>' . $code);
$output = ob_get_contents();
ob_end_clean();
// Recover original theme path.
$theme_path = $old_theme_path;
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 $GLOBALS['base_path'];
}
/**
* Add a <link> tag to the page's HEAD.
*
* This function can be called as long the HTML header hasn't been sent.
*/
function drupal_add_link($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.
*
* Modules should always prefix the names of their CSS files with the module
* name, for example: system-menus.css rather than simply menus.css. Themes
* can override module-supplied CSS files based on their filenames, and this
* prefixing helps prevent confusing name collisions for theme developers. * See drupal_get_css where the overrides are performed.
*
* 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 $options
* (optional) A string defining the type of CSS that is being added in the
* $path parameter ('module' or 'theme'), or an associative array of
* additional options, with the following keys:
* - 'type'
* The type of stylesheet that is being added. Types are: module or
* theme. Defaults to 'module'.
* - 'media'
* The media type for the stylesheet, e.g., all, print, screen. Defaults
* to 'all'.
* - 'preprocess':
* Allow this CSS file to be aggregated and compressed if the Optimize
* CSS feature has been turned on under the performance section. Defaults
* to TRUE.
*
* 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.
* @param $reset
* (optional) Resets the currently loaded cascading stylesheets.
* @return
* An array of CSS files.
*/
function drupal_add_css($path = NULL, $options = NULL, $reset = FALSE) {
static $css = array();
global $language;
// Request made to reset the CSS added so far.
if ($reset) {
$css = array();
}
// Create an array of CSS files for each media type first, since each type needs to be served
// to the browser differently.
if (isset($path)) {
// Construct the options, taking the defaults into consideration.
if (isset($options)) {
if (!is_array($options)) {
$options = array('type' => $options);
}
}
else {
$options = array();
}
$options += array(
'type' => 'module', 'media' => 'all',
'preprocess' => TRUE
);
$media = $options['media'];
$type = $options['type'];
// This check is necessary to ensure proper cascading of styles and is faster than an asort().
if (!isset($css[$media])) {
$css[$media] = array('module' => array(), 'theme' => array());
}
$css[$media][$type][$path] = $options['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] = $options['preprocess'];
}
}
}
return $css;
}
/**
* Returns a themed representation of all stylesheets that should be attached to the page.
*
* It loads the CSS in order, with 'module' first, then 'theme' afterwards.
* This ensures proper cascading of styles so themes can easily override
* module styles through CSS selectors.
*
* Themes may replace module-defined CSS files by adding a stylesheet with the
* same filename. For example, themes/garland/system-menus.css would replace
* modules/system/system-menus.css. This allows themes to override complete
* CSS files, rather than specific selectors, when necessary.
*
* If the original CSS file is being overridden by a theme, the theme is
* responsible for supplying an accompanying RTL CSS file to replace the
* module's.
*
* @param $css
* (optional) An array of CSS files. If no array is provided, the default
* stylesheets array is used instead.
* @return
* A string of XHTML CSS tags.
*/
function drupal_get_css($css = NULL) {
$output = '';
if (!isset($css)) {
$css = drupal_add_css();
}
$no_module_preprocess = '';
$no_theme_preprocess = '';
$preprocess_css = (variable_get('preprocess_css', FALSE) && (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update'));
$directory = file_directory_path();
$is_writable = is_dir($directory) && is_writable($directory) && (variable_get('file_downloads', FILE_DOWNLOADS_PUBLIC) == FILE_DOWNLOADS_PUBLIC);
// A dummy query-string is added to filenames, to gain control over
// browser-caching. The string changes on every update or full cache
// flush, forcing browsers to load a new copy of the files, as the
// URL changed.
$query_string = '?' . substr(variable_get('css_js_query_string', '0'), 0, 1);
foreach ($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 => $files) {
if ($type == 'module') {
// Setup theme overrides for module styles. $theme_styles = array();
foreach (array_keys($css[$media]['theme']) as $theme_style) {
$theme_styles[] = basename($theme_style);
}
}
foreach ($types[$type] as $file => $preprocess) {
// If the theme supplies its own style using the name of the module style, skip its inclusion.
// This includes any RTL styles associated with its main LTR counterpart.
if ($type == 'module' && in_array(str_replace('-rtl.css', '.css', basename($file)), $theme_styles)) {
// Unset the file to prevent its inclusion when CSS aggregation is enabled.
unset($types[$type][$file]);
continue;
}
// Only include the stylesheet if it exists.
if (file_exists($file)) {
if (!$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 . $query_string . '" />' . "\n";
}
// If a CSS file is not to be preprocessed and it's a theme CSS file, it needs to *always* appear at the *bottom*,
// regardless of whether preprocessing is on or off.
elseif (!$preprocess && $type == 'theme') {
$no_theme_preprocess .= '<link type="text/css" rel="stylesheet" media="' . $media . '" href="' . base_path() . $file . $query_string . '" />' . "\n";
}
else {
$output .= '<link type="text/css" rel="stylesheet" media="' . $media . '" href="' . base_path() . $file . $query_string . '" />' . "\n";
}
}
}
}
}
if ($is_writable && $preprocess_css) {
$filename = md5(serialize($types) . $query_string) . '.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) {
$contents = drupal_load_stylesheet($file, TRUE);
// Return the path to where this CSS file originated from.
$base = base_path() . dirname($file) . '/'; _drupal_build_css_path(NULL, $base);
// Prefix all paths within this CSS file, ignoring external and absolute paths.
$data .= preg_replace_callback('/url\([\'"]?(?![a-z]+:|\/+)([^\'")]+)[\'"]?\)/i', '_drupal_build_css_path', $contents);
}
}
}
// Per the W3C specification at http://www.w3.org/TR/REC-CSS2/cascade.html#at-import,
// @import rules must proceed any other style, so we move those to the top.
$regexp = '/@import[^;]+;/i';
preg_match_all($regexp, $data, $matches);
$data = preg_replace($regexp, '', $data);
$data = implode('', $matches[0]) . $data;
// Create the CSS file.
file_unmanaged_save_data($data, $csspath . '/' . $filename, FILE_EXISTS_REPLACE);
}
return $csspath . '/' . $filename;
}
/**
* Helper function for drupal_build_css_cache().
*
* This function will prefix all paths within a CSS file.
*/
function _drupal_build_css_path($matches, $base = NULL) {
static $_base;
// Store base path for preg_replace_callback.
if (isset($base)) {
$_base = $base;
}
// Prefix with base and remove '../' segments where possible.
$path = $_base . $matches[1];
$last = '';
while ($path != $last) {
$last = $path;
$path = preg_replace('`(^|/)(?!../)([^/]+)/../`', '$1', $path);
}
return 'url(' . $path . ')';
}
/**
* Loads the stylesheet and resolves all @import commands.
*
* Loads a stylesheet and replaces @import commands with the contents of the
* imported file. Use this instead of file_get_contents when processing
* stylesheets.
*
* The returned contents are compressed removing white space and comments only
* when CSS aggregation is enabled. This optimization will not apply for
* color.module enabled themes with CSS aggregation turned off.
*
* @param $file
* Name of the stylesheet to be processed.
* @param $optimize
* Defines if CSS contents should be compressed or not.
* @return
* Contents of the stylesheet including the imported stylesheets.
*/
function drupal_load_stylesheet($file, $optimize = NULL) {
static $_optimize;
// Store optimization parameter for preg_replace_callback with nested @import loops.
if (isset($optimize)) {
$_optimize = $optimize;
}
$contents = '';
if (file_exists($file)) {
// Load the local CSS stylesheet. $contents = file_get_contents($file);
// Change to the current stylesheet's directory.
$cwd = getcwd();
chdir(dirname($file));
// Replaces @import commands with the actual stylesheet content.
// This happens recursively but omits external files.
$contents = preg_replace_callback('/@import\s*(?:url\()?[\'"]?(?![a-z]+:)([^\'"\()]+)[\'"]?\)?;/', '_drupal_load_stylesheet', $contents);
// Remove multiple charset declarations for standards compliance (and fixing Safari problems).
$contents = preg_replace('/^@charset\s+[\'"](\S*)\b[\'"];/i', '', $contents);
if ($_optimize) {
// Perform some safe CSS optimizations.
$contents = 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', $contents);
}
// Change back directory.
chdir($cwd);
}
return $contents;
}
/**
* Loads stylesheets recursively and returns contents with corrected paths.
*
* This function is used for recursive loading of stylesheets and
* returns the stylesheet content with all url() paths corrected.
*/
function _drupal_load_stylesheet($matches) {
$filename = $matches[1];
// Load the imported stylesheet and replace @import commands in there as well.
$file = drupal_load_stylesheet($filename);
// Alter all url() paths, but not external.
return preg_replace('/url\(([\'"]?)(?![a-z]+:)([^\'")]+)[\'"]?\)?;/i', 'url(\1' . dirname($filename) . '/', $file);
}
/**
* Delete all cached CSS files.
*/
function drupal_clear_css_cache() {
file_scan_directory(file_create_path('css'), '/.*/', array('.', '..', 'CVS'), 'file_unmanaged_delete', TRUE);
}
/**
* Add a JavaScript file, setting or inline code to the page.
*
* The behavior of this function depends on the parameters it is called with.
* Generally, it handles the addition of JavaScript to the page, either as
* reference to an existing file or as inline code. The following actions can be
* performed using this function:
*
* - Add a file ('core', 'module' and 'theme'):
* Adds a reference to a JavaScript file to the page. JavaScript files
* are placed in a certain order, from 'core' first, to 'module' and finally
* 'theme' so that files, that are added later, can override previously added
* files with ease.
*
* - Add inline JavaScript code ('inline'):
* Executes a piece of JavaScript code on the current page by placing the code
* directly in the page. This can, for example, be useful to tell the user that
* a new message arrived, by opening a pop up, alert box etc.
*
* - Add settings ('setting'):
* Adds a setting to Drupal's global storage of JavaScript settings. Per-page * settings are required by some modules to function properly. The settings
* will be accessible at Drupal.settings.
*
* Examples:
* @code
* drupal_add_js('misc/collapse.js');
* drupal_add_js('misc/collapse.js', 'module');
* drupal_add_js('$(document).ready(function(){alert("Hello!");});',
* array('type' => 'inline', 'scope' => 'footer')
* );
* @endcode
*
* @param $data
* (optional) If given, the value depends on the $options 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 $options
* (optional) A string defining the type of JavaScript that is being added
* in the $data parameter ('core', 'module', 'theme', 'setting', 'inline'),
* or an array which can have any or all of the following keys (these are
* not valid with type => 'setting'):
* - type
* The type of JavaScript that should be added to the page. Allowed
* values are 'core', 'module', 'theme', 'inline' and 'setting'. Defaults
* to 'module'.
* - scope
* The location in which you want to place the script. Possible
* values are 'header' and 'footer'. If your theme implements different
* locations, however, you can also use these. Defaults to 'header'.
* - defer
* If set to TRUE, the defer attribute is set on the <script> tag.
* Defaults to FALSE. This parameter is not used with 'type' => 'setting'.
* - cache
* If set to FALSE, the JavaScript file is loaded anew on every page
* call, that means, it is not cached. Used only when type references
* a JavaScript file. Defaults to TRUE.
* - preprocess
* Aggregate the JavaScript if the JavaScript optimization setting has
* been toggled in admin/settings/performance. Defaults to TRUE.
* @param $reset
* (optional) Resets the currently loaded JavaScript.
* @return
* The contructed array of JavaScript files.
* @see drupal_get_js()
*/
function drupal_add_js($data = NULL, $options = NULL, $reset = FALSE) {
static $javascript = array();
// Construct the options, taking the defaults into consideration.
if (isset($options)) {
if (!is_array($options)) {
$options = array('type' => $options);
}
}
else {
$options = array();
}
$options += array(
'type' => 'module',
// Default to a header scope only if we're adding some data.
'scope' => isset($data) ? 'header' : NULL,
'cache' => TRUE,
'defer' => FALSE,
'preprocess' => TRUE
);
// Preprocess can only be set if caching is enabled. $options['preprocess'] = $options['cache'] ? $options['preprocess'] : FALSE;
$type = $options['type'];
$scope = $options['scope'];
unset($options['type'], $options['scope']);
// Request made to reset the JavaScript added so far.
if ($reset) {
$javascript = array();
}
if (isset($data)) {
// Add jquery.js and drupal.js, as well as the basePath setting, the
// first time a Javascript file is added.
if (empty($javascript)) {
$javascript = array(
'header' => array(
'core' => array(
'misc/jquery.js' => array('cache' => TRUE, 'defer' => FALSE, 'preprocess' => TRUE),
'misc/drupal.js' => array('cache' => TRUE, 'defer' => FALSE, 'preprocess' => TRUE),
),
'module' => array(),
'theme' => array(),
'setting' => array(
array('basePath' => base_path()),
),
'inline' => array(),
)
);
}
if (isset($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][$type] = array();
}
switch ($type) {
case 'setting':
$javascript[$scope][$type][] = $data;
break;
case 'inline':
$javascript[$scope][$type][] = array('code' => $data, 'defer' => $options['defer']);
break;
default:
$javascript[$scope][$type][$data] = $options;
}
}
if (isset($scope)) {
return isset($javascript[$scope]) ? $javascript[$scope] : array();
}
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. If running update.php, all preprocessing is disabled.
*
* @param $scope
* (optional) The scope for which the JavaScript rules should be returned.
* Defaults to 'header'.
* @param $javascript * (optional) An array with all JavaScript code. Defaults to the default
* JavaScript array for the given scope.
* @return
* All JavaScript code segments and includes for the scope as HTML tags.
* @see drupal_add_js()
*/
function drupal_get_js($scope = 'header', $javascript = NULL) {
if ((!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') && function_exists('locale_update_js_files')) {
locale_update_js_files();
}
if (!isset($javascript)) {
$javascript = drupal_add_js(NULL, array('scope' => $scope));
}
if (empty($javascript)) {
return '';
}
$output = '';
$preprocessed = '';
$no_preprocess = array('core' => '', 'module' => '', 'theme' => '');
$files = array();
$preprocess_js = (variable_get('preprocess_js', FALSE) && (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update'));
$directory = file_directory_path();
$is_writable = is_dir($directory) && is_writable($directory) && (variable_get('file_downloads', FILE_DOWNLOADS_PUBLIC) == FILE_DOWNLOADS_PUBLIC);
// A dummy query-string is added to filenames, to gain control over
// browser-caching. The string changes on every update or full cache
// flush, forcing browsers to load a new copy of the files, as the
// URL changed. Files that should not be cached (see drupal_add_js())
// get REQUEST_TIME as query-string instead, to enforce reload on every
// page request.
$query_string = '?' . substr(variable_get('css_js_query_string', '0'), 0, 1);
// For inline Javascript to validate as XHTML, all Javascript containing
// XHTML needs to be wrapped in CDATA. To make that backwards compatible
// with HTML 4, we need to comment out the CDATA-tag.
$embed_prefix = "\n<!--//--><![CDATA[//><!--\n";
$embed_suffix = "\n//--><!]]>\n";
foreach ($javascript as $type => $data) {
if (!$data) continue;
switch ($type) {
case 'setting':
$output .= '<script type="text/javascript">' . $embed_prefix . 'jQuery.extend(Drupal.settings, ' . drupal_to_js(call_user_func_array('array_merge_recursive', $data)) . ");" . $embed_suffix . "</script>\n";
break;
case 'inline':
foreach ($data as $info) {
$output .= '<script type="text/javascript"' . ($info['defer'] ? ' defer="defer"' : '') . '>' . $embed_prefix . $info['code'] . $embed_suffix . "</script>\n";
}
break;
default:
// If JS preprocessing is off, we still need to output the scripts.
// Additionally, go through any remaining scripts if JS preprocessing is on and output the non-cached ones.
foreach ($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'] ? $query_string : '?' . REQUEST_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) . $query_string) . '.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;
}
/**
* Assist in adding the tableDrag JavaScript behavior to a themed table.
*
* Draggable tables should be used wherever an outline or list of sortable items
* needs to be arranged by an end-user. Draggable tables are very flexible and
* can manipulate the value of form elements placed within individual columns.
*
* To set up a table to use drag and drop in place of weight select-lists or
* in place of a form that contains parent relationships, the form must be
* themed into a table. The table must have an id attribute set. If using
* theme_table(), the id may be set as such:
* @code
* $output = theme('table', $header, $rows, array('id' => 'my-module-table'));
* return $output;
* @endcode
*
* In the theme function for the form, a special class must be added to each
* form element within the same column, "grouping" them together.
*
* In a situation where a single weight column is being sorted in the table, the
* classes could be added like this (in the theme function):
* @code
* $form['my_elements'][$delta]['weight']['#attributes']['class'] = "my-elements-weight";
* @endcode
*
* Each row of the table must also have a class of "draggable" in order to enable the
* drag handles:
* @code
* $row = array(...);
* $rows[] = array(
* 'data' => $row,
* 'class' => 'draggable',
* );
* @endcode
*
* When tree relationships are present, the two additional classes
* 'tabledrag-leaf' and 'tabledrag-root' can be used to refine the behavior:
* - Rows with the 'tabledrag-leaf' class cannot have child rows.
* - Rows with the 'tabledrag-root' class cannot be nested under a parent row.
*
* Calling drupal_add_tabledrag() would then be written as such:
* @code
* drupal_add_tabledrag('my-module-table', 'order', 'sibling', 'my-elements-weight');
* @endcode
*
* In a more complex case where there are several groups in one column (such as
* the block regions on the admin/build/block page), a separate subgroup class
* must also be added to differentiate the groups.
* @code
* $form['my_elements'][$region][$delta]['weight']['#attributes']['class'] = "my-elements-weight my-elements-weight-" . $region;
* @endcode
*
* $group is still 'my-element-weight', and the additional $subgroup variable
* will be passed in as 'my-elements-weight-' . $region. This also means that
* you'll need to call drupal_add_tabledrag() once for every region added.
*
* @code
* foreach ($regions as $region) {
* drupal_add_tabledrag('my-module-table', 'order', 'sibling', 'my-elements-weight', 'my-elements-weight-' . $region); * }
* @endcode
*
* In a situation where tree relationships are present, adding multiple
* subgroups is not necessary, because the table will contain indentations that
* provide enough information about the sibling and parent relationships.
* See theme_menu_overview_form() for an example creating a table containing
* parent relationships.
*
* Please note that this function should be called from the theme layer, such as
* in a .tpl.php file, theme_ function, or in a template_preprocess function,
* not in a form declartion. Though the same JavaScript could be added to the
* page using drupal_add_js() directly, this function helps keep template files
* clean and readable. It also prevents tabledrag.js from being added twice
* accidentally.
*
* @param $table_id
* String containing the target table's id attribute. If the table does not
* have an id, one will need to be set, such as <table id="my-module-table">.
* @param $action
* String describing the action to be done on the form item. Either 'match'
* 'depth', or 'order'. Match is typically used for parent relationships.
* Order is typically used to set weights on other form elements with the same
* group. Depth updates the target element with the current indentation.
* @param $relationship
* String describing where the $action variable should be performed. Either
* 'parent', 'sibling', 'group', or 'self'. Parent will only look for fields
* up the tree. Sibling will look for fields in the same group in rows above
* and below it. Self affects the dragged row itself. Group affects the
* dragged row, plus any children below it (the entire dragged group).
* @param $group
* A class name applied on all related form elements for this action.
* @param $subgroup
* (optional) If the group has several subgroups within it, this string should
* contain the class name identifying fields in the same subgroup.
* @param $source
* (optional) If the $action is 'match', this string should contain the class
* name identifying what field will be used as the source value when matching
* the value in $subgroup.
* @param $hidden
* (optional) The column containing the field elements may be entirely hidden
* from view dynamically when the JavaScript is loaded. Set to FALSE if the
* column should not be hidden.
* @param $limit
* (optional) Limit the maximum amount of parenting in this table.
* @see block-admin-display-form.tpl.php
* @see theme_menu_overview_form()
*/
function drupal_add_tabledrag($table_id, $action, $relationship, $group, $subgroup = NULL, $source = NULL, $hidden = TRUE, $limit = 0) {
static $js_added = FALSE;
if (!$js_added) {
drupal_add_js('misc/tabledrag.js', 'core');
$js_added = TRUE;
}
// If a subgroup or source isn't set, assume it is the same as the group.
$target = isset($subgroup) ? $subgroup : $group;
$source = isset($source) ? $source : $target;
$settings['tableDrag'][$table_id][$group][] = array(
'target' => $target,
'source' => $source,
'relationship' => $relationship,
'action' => $action,
'hidden' => $hidden,
'limit' => $limit,
);
drupal_add_js($settings, 'setting');
}
/** * 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.
$contents .= file_get_contents($path) . ';';
}
}
// Create the JS file.
file_unmanaged_save_data($contents, $jspath . '/' . $filename, FILE_EXISTS_REPLACE);
}
return $jspath . '/' . $filename;
}
/**
* Delete all cached JS files.
*/
function drupal_clear_js_cache() {
file_scan_directory(file_create_path('js'), '/.*/', array('.', '..', 'CVS'), 'file_unmanaged_delete', TRUE);
variable_set('javascript_parsed', array());
}
/**
* Converts a PHP variable into its Javascript equivalent.
*
* We use HTML-safe strings, i.e. with <, > and & escaped.
*/
function drupal_to_js($var) {
// json_encode() does not escape <, > and &, so we do it with str_replace()
return str_replace(array("<", ">", "&"), array('\x3c', '\x3e', '\x26'), json_encode($var));
}
/**
* 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'),
rawurlencode($text));
}
else {
return str_replace('%2F', '/', rawurlencode($text));
}
}
/**
* Returns a string of highly randomized bytes (over the full 8-bit range).
*
* This function is better than simply calling mt_rand() or any other built-in
* PHP function because it can return a long string of bytes (compared to < 4
* bytes normally from mt_rand()) and uses the best available pseudo-random source.
*
* @param $count
* The number of characters (bytes) to return in the string.
*/
function drupal_random_bytes($count) {
static $random_state;
// We initialize with the somewhat random PHP process ID on the first call.
if (empty($random_state)) {
$random_state = getmypid();
}
$output = '';
// /dev/urandom is available on many *nix systems and is considered the best
// commonly available pseudo-random source.
if ($fh = @fopen('/dev/urandom', 'rb')) {
$output = fread($fh, $count);
fclose($fh);
}
// If /dev/urandom is not available or returns no bytes, this loop will
// generate a good set of pseudo-random bytes on any system.
// Note that it may be important that our $random_state is passed
// through md5() prior to being rolled into $output, that the two md5()
// invocations are different, and that the extra input into the first one -
// the microtime() - is prepended rather than appended. This is to avoid
// directly leaking $random_state via the $output stream, which could
// allow for trivial prediction of further "random" numbers.
while (strlen($output) < $count) {
$random_state = md5(microtime() . mt_rand() . $random_state);
$output .= md5(mt_rand() . $random_state, TRUE);
}
return substr($output, 0, $count);
}
/**
* Ensure the private key variable used to generate tokens is set.
*
* @return * The private key.
*/
function drupal_get_private_key() {
if (!($key = variable_get('drupal_private_key', 0))) {
$key = md5(drupal_random_bytes(64));
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 DRUPAL_ROOT . '/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 DRUPAL_ROOT . '/includes/theme.inc';
require_once DRUPAL_ROOT . '/includes/pager.inc';
require_once DRUPAL_ROOT . '/includes/menu.inc';
require_once DRUPAL_ROOT . '/includes/tablesort.inc';
require_once DRUPAL_ROOT . '/includes/file.inc';
require_once DRUPAL_ROOT . '/includes/unicode.inc';
require_once DRUPAL_ROOT . '/includes/image.inc';
require_once DRUPAL_ROOT . '/includes/form.inc';
require_once DRUPAL_ROOT . '/includes/mail.inc';
require_once DRUPAL_ROOT . '/includes/actions.inc';
// Set the Drupal custom error handler.
set_error_handler('_drupal_error_handler');
set_exception_handler('_drupal_exception_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
// We do not want this while running update.php.
if (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') {
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' || $_SERVER['REQUEST_METHOD'] == 'HEAD') && count(drupal_get_messages(NULL, FALSE)) == 0) {
// This will fail in some cases, see page_get_cache() for the explanation.
if ($data = ob_get_contents()) {
$cache = TRUE;
if (variable_get('page_compression', TRUE) && 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;
}
elseif (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() {
// Allow execution to continue even if the request gets canceled.
@ignore_user_abort(TRUE);
// Increase the maximum execution time.
@set_time_limit(240);
// Fetch the cron semaphore
$semaphore = variable_get('cron_semaphore', FALSE);
if ($semaphore) {
if (REQUEST_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', REQUEST_TIME);
// Iterate through the modules calling their cron handlers (if any):
module_invoke_all('cron');
// Record cron time
variable_set('cron_last', REQUEST_TIME);
watchdog('cron', 'Cron run completed.', array(), WATCHDOG_NOTICE);
// Release cron 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');
}
}
/**
* Return an array of system file objects. *
* Returns an array of file 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 preg_match() 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;
}
/**
* Hands off structured Drupal arrays to type-specific *_alter implementations.
*
* 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) {
// PHP's func_get_args() always returns copies of params, not references, so
// drupal_alter() can only manipulate data that comes in via the required first
// param. For the edge case functions that must pass in an arbitrary number of
// alterable parameters (hook_form_alter() being the best example), an array of
// those params can be placed in the __drupal_alter_by_ref key of the $data
// array. This is somewhat ugly, but is an unavoidable consequence of a flexible
// drupal_alter() function, and the limitations of func_get_args().
// @todo: Remove this in Drupal 7.
if (is_array($data) && isset($data['__drupal_alter_by_ref'])) {
$by_ref_parameters = $data['__drupal_alter_by_ref'];
unset($data['__drupal_alter_by_ref']);
}
// Hang onto a reference to the data array so that it isn't blown away later.
// Also, merge in any parameters that need to be passed by reference.
$args = array(&$data);
if (isset($by_ref_parameters)) {
$args = array_merge($args, $by_ref_parameters);
}
// 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 $function) {
if (drupal_function_exists($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('#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 {
$elements['#markup'] = '';
}
unset($elements['#prefix'], $elements['#suffix']);
$content = theme($elements['#theme'], $elements);
foreach (array('#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 $function) {
if (drupal_function_exists($function)) {
$content = $function($content, $elements);
}
}
}
$prefix = isset($elements['#prefix']) ? $elements['#prefix'] : ''; $suffix = isset($elements['#suffix']) ? $elements['#suffix'] : '';
return $prefix . $content . $suffix;
}
}
/**
* Function used by uasort to sort structured arrays by weight.
*/
function element_sort($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_theme() {
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_blocks' => TRUE, 'show_messages' => TRUE),
'template' => 'maintenance-page',
'path' => 'includes',
'file' => 'theme.maintenance.inc',
),
'update_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),
),
'more_link' => 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),
),
'indentation' => array(
'arguments' => array('size' => 1), ),
// 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
* @{
*/
/**
* 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 $module
* The module for which the tables will be created.
* @return
* An array of arrays with the following key/value pairs:
* - success: a boolean indicating whether the query succeeded.
* - query: the SQL query(s) executed, passed through check_plain().
*/
function drupal_install_schema($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);
}
return $ret;
}
/**
* Remove all tables that a module defines in its hook_schema().
* * Note: This function does not pass the module's schema through
* hook_schema_alter(). The module's tables will be created exactly as the
* module defines them.
*
* @param $module
* The module for which the tables will be removed.
* @return
* An array of arrays with the following key/value pairs:
* - success: a boolean indicating whether the query succeeded.
* - query: the SQL query(s) executed, passed through check_plain().
*/
function drupal_uninstall_schema($module) {
$schema = drupal_get_schema_unprocessed($module);
_drupal_initialize_schema($module, $schema);
$ret = array();
foreach ($schema as $table) {
if (db_table_exists($table['name'])) {
db_drop_table($ret, $table['name']);
}
}
return $ret;
}
/**
* Returns the unprocessed and unaltered version of a module's schema.
*
* Use this function only if you explicitly need the original
* specification of a schema, as it was defined in a module's
* hook_schema(). No additional default values will be set,
* hook_schema_alter() is not invoked and these unprocessed
* definitions won't be cached.
*
* This function can be used to retrieve a schema specification in
* hook_schema(), so it allows you to derive your tables from existing
* specifications.
*
* It is also used by drupal_install_schema() and
* drupal_uninstall_schema() to ensure that a module's tables are
* created exactly as specified without any changes introduced by a
* module that implements hook_schema_alter().
*
* @param $module
* The module to which the table belongs.
* @param $table
* The name of the table. If not given, the module's complete schema
* is returned.
*/
function drupal_get_schema_unprocessed($module, $table = NULL) {
// Load the .install file to get hook_schema.
module_load_install($module);
$schema = module_invoke($module, 'schema');
if (!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;
}
}
}
/**
* Retrieve a list of fields from a table schema. The list is suitable for use in a SQL query.
*
* @param $table
* The name of the table from which to retrieve fields.
* @param
* An optional prefix to to all fields.
*
* @return An array of fields.
**/
function drupal_schema_fields_sql($table, $prefix = NULL) {
$schema = drupal_get_schema($table);
$fields = array_keys($schema['fields']);
if ($prefix) {
$columns = array();
foreach ($fields as $field) {
$columns[] = "$prefix.$field";
}
return $columns;
}
else {
return $fields;
}
}
/**
* Save a record to the database based upon the schema.
*
* Default values are filled in for missing items, and 'serial' (auto increment)
* types are filled in with IDs.
*
* @param $table
* The name of the table; this must exist in schema API.
* @param $object
* The object to write. This is a reference, as defaults according to
* the schema may be filled in on the object, as well as ID on the serial
* type(s). Both array an object types may be passed.
* @param $primary_keys
* If this is an update, specify the primary keys' field names. It is the
* caller's responsibility to know if a record for this object already
* exists in the database. If there is only 1 key, you may pass a simple string.
* @return
* Failure to write a record will return FALSE. Otherwise SAVED_NEW or
* SAVED_UPDATED is returned depending on the operation performed. The
* $object parameter contains values for any serial fields defined by
* the $table. For example, $object->nid will be populated after inserting
* a new node.
*/
function drupal_write_record($table, &$object, $primary_keys = array()) {
// Standardize $primary_keys to an array.
if (is_string($primary_keys)) {
$primary_keys = array($primary_keys);
}
$schema = drupal_get_schema($table);
if (empty($schema)) {
return FALSE;
}
// Convert to an object if needed.
if (is_array($object)) {
$object = (object) $object;
$array = TRUE;
}
else {
$array = FALSE;
}
$fields = array();
// Go through our schema, build SQL, and when inserting, fill in defaults for
// fields that are not set.
foreach ($schema['fields'] as $field => $info) {
// Special case -- skip serial types if we are updating.
if ($info['type'] == 'serial' && !empty($primary_keys)) {
continue;
}
// For inserts, populate defaults from schema if not already provided.
if (!isset($object->$field) && empty($primary_keys) && isset($info['default'])) {
$object->$field = $info['default'];
}
// Track serial field so we can helpfully populate them after the query.
// NOTE: Each table should come with one serial field only.
if ($info['type'] == 'serial') {
$serial = $field;
// Ignore values for serial when inserting data. Unsupported.
unset($object->$field);
}
// Build arrays for the fields and values in our query.
if (isset($object->$field)) {
if (empty($info['serialize'])) {
$fields[$field] = $object->$field;
}
elseif (!empty($object->$field)) {
$fields[$field] = serialize($object->$field);
}
else {
$fields[$field] = '';
}
}
// We don't need to care about type casting if value does not exist.
if (!isset($fields[$field])) {
continue;
}
// Special case -- skip null value if field allows null.
if ($fields[$field] == NULL && $info['not null'] == FALSE) {
continue;
}
// Type cast if field does not allow null. Required by DB API.
if ($info['type'] == 'int' || $info['type'] == 'serial') {
$fields[$field] = (int) $fields[$field];
}
elseif ($info['type'] == 'float') {
$fields[$field] = (float) $fields[$field];
}
else {
$fields[$field] = (string) $fields[$field];
}
}
if (empty($fields)) {
// No changes requested. // If we began with an array, convert back so we don't surprise the caller.
if ($array) {
$object = (array) $object;
}
return;
}
// Build the SQL.
if (empty($primary_keys)) {
$query = db_insert($table)->fields($fields);
$return = SAVED_NEW;
}
else {
$query = db_update($table)->fields($fields);
foreach ($primary_keys as $key){
$query->condition($key, $object->$key);
}
$return = SAVED_UPDATED;
}
// Execute the SQL.
if ($last_insert_id = $query->execute()) {
if (isset($serial)) {
// Populate the serial field.
$object->$serial = $last_insert_id;
}
}
else {
$return = FALSE;
}
// If we began with an array, convert back so we don't surprise the caller.
if ($array) {
$object = (array) $object;
}
return $return;
}
/**
* @} 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
* 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 $info;
}
/**
* Severity levels, as defined in RFC 3164: http://www.ietf.org/rfc/rfc3164.txt.
*
* @return
* Array of the possible severity levels for log messages.
*
* @see watchdog()
*/
function watchdog_severity_levels() {
return array(
WATCHDOG_EMERG => t('emergency'),
WATCHDOG_ALERT => t('alert'),
WATCHDOG_CRITICAL => t('critical'),
WATCHDOG_ERROR => t('error'),
WATCHDOG_WARNING => t('warning'),
WATCHDOG_NOTICE => t('notice'),
WATCHDOG_INFO => t('info'),
WATCHDOG_DEBUG => t('debug'),
);
}
/**
* Explode a string of given tags into an array.
*/
function drupal_explode_tags($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);
}
/**
* Flush all cached data on the site.
*
* Empties cache tables, rebuilds the menu cache and theme registries, and
* invokes a hook so that other modules' cache data can be cleared as well.
*/
function drupal_flush_all_caches() {
// Change query-strings on css/js files to enforce reload for all users.
_drupal_flush_css_js();
registry_rebuild();
drupal_clear_css_cache();
drupal_clear_js_cache();
system_theme_data();
drupal_theme_rebuild();
menu_rebuild();
node_types_rebuild();
// Don't clear cache_form - in-progress form submissions may break.
// Ordered so clearing the page cache will always be the last action.
$core = array('cache', 'cache_block', 'cache_filter', 'cache_registry', 'cache_page');
$cache_tables = array_merge(module_invoke_all('flush_caches'), $core);
foreach ($cache_tables as $table) {
cache_clear_all('*', $table, TRUE);
}
}
/**
* Helper function to change query-strings on css/js files.
*
* Changes the character added to all css/js files as dummy query-string,
* so that all browsers are forced to reload fresh files. We keep
* 20 characters history (FIFO) to avoid repeats, but only the first
* (newest) character is actually used on urls, to keep them short.
* This is also called from update.php.
*/
function _drupal_flush_css_js() {
$string_history = variable_get('css_js_query_string', '00000000000000000000');
$new_character = $string_history[0];
$characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
while (strpos($string_history, $new_character) !== FALSE) {
$new_character = $characters[mt_rand(0, strlen($characters) - 1)];
}
variable_set('css_js_query_string', $new_character . substr($string_history, 0, 19));
}