site_iri: comparison web/drupal/includes/common.inc

equal deleted inserted replaced

-:fcf75e232c5b
+:0ff3ba646492
+<?php
+// $Id: common.inc,v 1.756.2.57 2009/07/01 20:51:55 goba Exp $
+/**
+* @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", $stored_headers);
+}
+/**
+* Get the HTTP response headers for the current page.
+*/
+function drupal_get_headers() {
+return drupal_set_header();
+}
+/**
+* Make any final alterations to the rendered xhtml.
+*/
+function drupal_final_markup($content) {
+// Make sure that the charset is always specified as the first element of the
+// head region to prevent encoding-based attacks.
+return preg_replace('/<head[^>]*>/i', "\$0\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />", $content, 1);
+}
+/**
+* Add a feed URL for the current page.
+*
+* @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) or the $_REQUEST['edit']-array (i.e. by
+* using a hidden form field). This is used to direct the user back to
+* the proper page after completing a form. For example, after editing
+* a post on the 'admin/content/node'-page or after having logged on using the
+* 'user login'-block in a sidebar. The function drupal_get_destination()
+* can be used to help set the destination URL.
+*
+* 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($_REQUEST['destination'])));
+}
+else if (isset($_REQUEST['edit']['destination'])) {
+extract(parse_url(urldecode($_REQUEST['edit']['destination'])));
+}
+$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, $http_response_code);
+// The "Location" header sends a redirect status code to the HTTP daemon. In
+// some cases this can be wrong, so we make sure none of the code below the
+// drupal_goto() call gets executed upon redirection.
+exit();
+}
+/**
+* Generates a site off-line message.
+*/
+function drupal_site_offline() {
+drupal_maintenance_theme();
+drupal_set_header('HTTP/1.1 503 Service unavailable');
+drupal_set_title(t('Site off-line'));
+print theme('maintenance_page', filter_xss_admin(variable_get('site_offline_message',
+t('@site is currently under maintenance. We should be back shortly. Thank you for your patience.', array('@site' => variable_get('site_name', 'Drupal'))))));
+}
+/**
+* Generates a 404 error if the request can not be handled.
+*/
+function drupal_not_found() {
+drupal_set_header('HTTP/1.1 404 Not Found');
+watchdog('page not found', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
+$path = drupal_get_normal_path(variable_get('site_404', ''));
+if ($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', $return, FALSE);
+}
+/**
+* Generates a 403 error if the request is not allowed.
+*/
+function drupal_access_denied() {
+drupal_set_header('HTTP/1.1 403 Forbidden');
+watchdog('access denied', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
+$path = drupal_get_normal_path(variable_get('site_403', ''));
+if ($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, $retry = 3) {
+$result = new stdClass();
+// Parse the URL and make sure we can handle the schema.
+$uri = parse_url($url);
+if ($uri == FALSE) {
+$result->error = 'unable to parse URL';
+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, $errstr, 15);
+break;
+case 'https':
+// Note: Only works for PHP 4.3 compiled with OpenSSL.
+$port = isset($uri['port']) ? $uri['port'] : 443;
+$host = $uri['host'] . ($port != 443 ? ':'. $port : '');
+$fp = @fsockopen('ssl://'. $uri['host'], $port, $errno, $errstr, 20);
+break;
+default:
+$result->error = 'invalid schema '. $uri['scheme'];
+return $result;
+}
+// Make sure the socket opened properly.
+if (!$fp) {
+// When a network error occurs, we use a negative number so it does not
+// clash with the HTTP status codes.
+$result->code = -$errno;
+$result->error = trim($errstr);
+// Mark that this request failed. This will trigger a check of the web
+// server's ability to make outgoing HTTP requests the next time that
+// requirements checking is performed.
+// @see system_requirements()
+variable_set('drupal_http_request_fails', TRUE);
+return $result;
+}
+// Construct the path to act on.
+$path = isset($uri['path']) ? $uri['path'] : '/';
+if (isset($uri['query'])) {
+$path .= '?'. $uri['query'];
+}
+// Create HTTP request.
+$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+/", $GLOBALS['db_prefix'], $matches)) {
+$defaults['User-Agent'] = '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";
+$request .= $data;
+$result->request = $request;
+fwrite($fp, $request);
+// Fetch response.
+$response = '';
+while (!feof($fp) && $chunk = fread($fp, 1024)) {
+$response .= $chunk;
+}
+fclose($fp);
+// Parse response.
+list($split, $result->data) = explode("\r\n\r\n", $response, 2);
+$split = preg_split("/\r\n|\n|\r/", $split);
+list($protocol, $code, $text) = explode(' ', trim(array_shift($split)), 3);
+$result->headers = array();
+// Parse headers.
+while ($line = trim(array_shift($split))) {
+list($header, $value) = explode(':', $line, 2);
+if (isset($result->headers[$header]) && $header == 'Set-Cookie') {
+// RFC 2109: the Set-Cookie response header comprises the token Set-
+// Cookie:, followed by a comma-separated list of one or more cookies.
+$result->headers[$header] .= ','. trim($value);
+}
+else {
+$result->headers[$header] = trim($value);
+}
+}
+$responses = array(
+100 => 'Continue', 101 => 'Switching Protocols',
+200 => 'OK', 201 => 'Created', 202 => 'Accepted', 203 => 'Non-Authoritative Information', 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content',
+300 => 'Multiple Choices', 301 => 'Moved Permanently', 302 => 'Found', 303 => 'See Other', 304 => 'Not Modified', 305 => 'Use Proxy', 307 => 'Temporary Redirect',
+400 => 'Bad Request', 401 => 'Unauthorized', 402 => 'Payment Required', 403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed', 406 => 'Not Acceptable', 407 => 'Proxy Authentication Required', 408 => 'Request Time-out', 409 => 'Conflict', 410 => 'Gone', 411 => 'Length Required', 412 => 'Precondition Failed', 413 => 'Request Entity Too Large', 414 => 'Request-URI Too Large', 415 => 'Unsupported Media Type', 416 => 'Requested range not satisfiable', 417 => 'Expectation Failed',
+500 => 'Internal Server Error', 501 => 'Not Implemented', 502 => 'Bad Gateway', 503 => 'Service Unavailable', 504 => 'Gateway Time-out', 505 => 'HTTP Version not supported'
+);
+// RFC 2616 states that all unknown HTTP codes must be treated the same as the
+// base code in their class.
+if (!isset($responses[$code])) {
+$code = floor($code / 100) * 100;
+}
+switch ($code) {
+case 200: // OK
+case 304: // Not modified
+break;
+case 301: // Moved permanently
+case 302: // Moved temporarily
+case 307: // Moved temporarily
+$location = $result->headers['Location'];
+if ($retry) {
+$result = drupal_http_request($result->headers['Location'], $headers, $method, $data, --$retry);
+$result->redirect_code = $result->code;
+}
+$result->redirect_url = $location;
+break;
+default:
+$result->error = $text;
+}
+$result->code = $code;
+return $result;
+}
+/**
+* @} End of "HTTP handling".
+*/
+/**
+* Log errors as defined by administrator.
+*
+* Error levels:
+* - 0 = Log errors to database.
+* - 1 = Log errors to database and to screen.
+*/
+function drupal_error_handler($errno, $message, $filename, $line, $context) {
+// If the @ error suppression operator was used, error_reporting will have
+// been temporarily set to 0.
+if (error_reporting() == 0) {
+return;
+}
+if ($errno & (E_ALL ^ E_NOTICE)) {
+$types = array(1 => 'error', 2 => 'warning', 4 => 'parse error', 8 => 'notice', 16 => 'core error', 32 => 'core warning', 64 => 'compile error', 128 => 'compile warning', 256 => 'user error', 512 => 'user warning', 1024 => 'user notice', 2048 => 'strict warning', 4096 => 'recoverable fatal error');
+// For database errors, we want the line number/file name of the place that
+// the query was originally called, not _db_query().
+if (isset($context[DB_ERROR])) {
+$backtrace = array_reverse(debug_backtrace());
+// List of functions where SQL queries can originate.
+$query_functions = array('db_query', 'pager_query', 'db_query_range', 'db_query_temporary', 'update_sql');
+// Determine where query function was called, and adjust line/file
+// accordingly.
+foreach ($backtrace as $index => $function) {
+if (in_array($function['function'], $query_functions)) {
+$line = $backtrace[$index]['line'];
+$filename = $backtrace[$index]['file'];
+break;
+}
+}
+}
+$entry = $types[$errno] .': '. $message .' in '. $filename .' on line '. $line .'.';
+// Force display of error messages in update.php.
+if (variable_get('error_level', 1) == 1 || strstr($_SERVER['SCRIPT_NAME'], 'update.php')) {
+drupal_set_message($entry, 'error');
+}
+watchdog('php', '%message in %file on line %line.', array('%error' => $types[$errno], '%message' => $message, '%file' => $filename, '%line' => $line), WATCHDOG_ERROR);
+}
+}
+function _fix_gpc_magic(&$item) {
+if (is_array($item)) {
+array_walk($item, '_fix_gpc_magic');
+}
+else {
+$item = stripslashes($item);
+}
+}
+/**
+* Helper function to strip slashes from $_FILES skipping over the tmp_name keys
+* since PHP generates single backslashes for file paths on Windows systems.
+*
+* tmp_name does not have backslashes added see
+* http://php.net/manual/en/features.file-upload.php#42280
+*/
+function _fix_gpc_magic_files(&$item, $key) {
+if ($key != 'tmp_name') {
+if (is_array($item)) {
+array_walk($item, '_fix_gpc_magic_files');
+}
+else {
+$item = stripslashes($item);
+}
+}
+}
+/**
+* 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.
+*
+* 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)));
+*   @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
+*
+* Avoid escaping quotation marks wherever possible.
+*
+* Incorrect:
+* @code
+*   $output .= t('Don\'t click me.');
+* @endcode
+*
+* Correct:
+* @code
+*   $output .= t("Don't click me.");
+* @endcode
+*
+* Because t() is designed for handling code-based strings, in almost all
+* cases, the actual string and not a variable must be passed through t().
+*
+* Extraction of translations is done based on the strings contained in t()
+* calls. If a variable is passed through t(), the content of the variable
+* cannot be extracted from the file for translation.
+*
+* Incorrect:
+* @code
+*   $message = 'An error occurred.';
+*   drupal_set_message(t($message), 'error');
+*   $output .= t($message);
+* @endcode
+*
+* Correct:
+* @code
+*   $message = t('An error occurred.');
+*   drupal_set_message($message, 'error');
+*   $output .= $message;
+* @endcode
+*
+* The only case in which variables can be passed safely through t() is when
+* code-based versions of the same strings will be passed through t() (or
+* otherwise extracted) elsewhere.
+*
+* In some cases, modules may include strings in code that can't use t()
+* calls. For example, a module may use an external PHP application that
+* produces strings that are loaded into variables in Drupal for output.
+* In these cases, module authors may include a dummy file that passes the
+* relevant strings through t(). This approach will allow the strings to be
+* extracted.
+*
+* Sample external (non-Drupal) code:
+* @code
+*   class Time {
+*     public $yesterday = 'Yesterday';
+*     public $today = 'Today';
+*     public $tomorrow = 'Tomorrow';
+*   }
+* @endcode
+*
+* Sample dummy file.
+* @code
+*   // Dummy function included in example.potx.inc.
+*   function example_potx() {
+*     $strings = array(
+*       t('Yesterday'),
+*       t('Today'),
+*       t('Tomorrow'),
+*     );
+*     // No return value needed, since this is a dummy function.
+*   }
+* @endcode
+*
+* Having passed strings through t() in a dummy function, it is then
+* okay to pass variables through t().
+*
+* Correct (if a dummy file was used):
+* @code
+*   $time = new Time();
+*   $output .= t($time->today);
+* @endcode
+*
+* However tempting it is, custom data from user input or other non-code
+* sources should not be passed through t(). Doing so leads to the following
+* problems and errors:
+*  - The t() system doesn't support updates to existing strings. When user
+*    data is updated, the next time it's passed through t() a new record is
+*    created instead of an update. The database bloats over time and any
+*    existing translations are orphaned with each update.
+*  - The t() system assumes any data it receives is in English. User data may
+*    be in another language, producing translation errors.
+*  - The "Built-in interface" text group in the locale system is used to
+*    produce translations for storage in .po files. When non-code strings are
+*    passed through t(), they are added to this text group, which is rendered
+*    inaccurate since it is a mix of actual interface strings and various user
+*    input strings of uncertain origin.
+*
+* Incorrect:
+* @code
+*   $item = item_load();
+*   $output .= check_plain(t($item['title']));
+* @endcode
+*
+* Instead, translation of these data can be done through the locale system,
+* either directly or through helper functions provided by contributed
+* modules.
+* @see hook_locale()
+*
+* During installation, st() is used in place of t(). Code that may be called
+* during installation or during normal operation should use the get_t()
+* helper function.
+* @see st()
+* @see get_t()
+*
+* @param $string
+*   A string containing the English string to translate.
+* @param $args
+*   An associative array of replacements to make after translation. Incidences
+*   of any key in this array are replaced with the corresponding value. Based
+*   on the first character of the key, the value is escaped and/or themed:
+*    - !variable: inserted as is
+*    - @variable: escape plain text to HTML (check_plain)
+*    - %variable: escape text and theme as a placeholder for user-submitted
+*      content (check_plain + theme_placeholder)
+* @param $langcode
+*   Optional language code to translate to a language other than what is used
+*   to display the page.
+* @return
+*   The translated string.
+*/
+function t($string, $args = array(), $langcode = NULL) {
+global $language;
+static $custom_strings;
+$langcode = isset($langcode) ? $langcode : $language->language;
+// First, check for an array of customized strings. If present, use the array
+// *instead of* database lookups. This is a high performance way to provide a
+// handful of string replacements. See settings.php for examples.
+// Cache the $custom_strings variable to improve performance.
+if (!isset($custom_strings[$langcode])) {
+$custom_strings[$langcode] = variable_get('locale_custom_strings_'. $langcode, array());
+}
+// Custom strings work for English too, even if locale module is disabled.
+if (isset($custom_strings[$langcode][$string])) {
+$string = $custom_strings[$langcode][$string];
+}
+// Translate with locale module if enabled.
+elseif (function_exists('locale') && $langcode != 'en') {
+$string = locale($string, $langcode);
+}
+if (empty($args)) {
+return $string;
+}
+else {
+// Transform arguments before inserting them.
+foreach ($args as $key => $value) {
+switch ($key[0]) {
+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) {
+$user = '[a-zA-Z0-9_\-\.\+\^!#\$%&*+\/\=\?\`\|\{\}~\']+';
+$domain = '(?:(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.?)+';
+$ipv4 = '[0-9]{1,3}(\.[0-9]{1,3}){3}';
+$ipv6 = '[0-9a-fA-F]{1,4}(\:[0-9a-fA-F]{1,4}){7}';
+return preg_match("/^$user@($domain|(\[($ipv4|$ipv6)\]))$/", $mail);
+}
+/**
+* Verify the syntax of the given URL.
+*
+* This function should only be used on actual URLs. It should not be used for
+* Drupal menu paths, which can contain arbitrary characters.
+* Valid values per RFC 3986.
+*
+* @param $url
+*   The URL to verify.
+* @param $absolute
+*   Whether the URL is absolute (beginning with a scheme such as "http:").
+* @return
+*   TRUE if the URL is in a valid format.
+*/
+function valid_url($url, $absolute = FALSE) {
+if ($absolute) {
+return (bool)preg_match("
+/^                                                      # Start at the beginning of the text
+(?:ftp|https?):\/\/                                     # Look for ftp, http, or https schemes
+(?:                                                     # Userinfo (optional) which is typically
+(?:(?:[\w\.\-\+!$&'\(\)*\+,;=]|%[0-9a-f]{2})+:)*      # a username or a username and password
+(?:[\w\.\-\+%!$&'\(\)*\+,;=]|%[0-9a-f]{2})+@          # combination
+)?
+(?:
+(?:[a-z0-9\-\.]|%[0-9a-f]{2})+                        # A domain name or a IPv4 address
+|(?:\[(?:[0-9a-f]{0,4}:)*(?:[0-9a-f]{0,4})\])         # or a well formed IPv6 address
+)
+(?::[0-9]+)?                                            # Server port number (optional)
+(?:[\/|\?]
+(?:[\w#!:\.\?\+=&@$'~*,;\/\(\)\[\]\-]|%[0-9a-f]{2})   # The path and query (optional)
+*)?
+$/xi", $url);
+}
+else {
+return (bool)preg_match("/^(?:[\w#!:\.\?\+=&@$'~*,;\/\(\)\[\]\-]|%[0-9a-f]{2})+$/i", $url);
+}
+}
+/**
+* @} End of "defgroup validation".
+*/
+/**
+* Register an event for the current visitor (hostname/IP) to the flood control mechanism.
+*
+* @param $name
+*   The name of an event.
+*/
+function flood_register_event($name) {
+db_query("INSERT INTO {flood} (event, hostname, timestamp) VALUES ('%s', '%s', %d)", $name, ip_address(), time());
+}
+/**
+* Check if the current visitor (hostname/IP) is allowed to proceed with the specified event.
+*
+* The user is allowed to proceed if he did not trigger the specified event more
+* than $threshold times per hour.
+*
+* @param $name
+*   The name of the event.
+* @param $number
+*   The maximum number of the specified event per hour (per visitor).
+* @return
+*   True if the user did not exceed the hourly threshold. False otherwise.
+*/
+function flood_is_allowed($name, $threshold) {
+$number = db_result(db_query("SELECT COUNT(*) FROM {flood} WHERE event = '%s' AND hostname = '%s' AND timestamp > %d", $name, ip_address(), time() - 3600));
+return ($number < $threshold ? TRUE : FALSE);
+}
+function check_file($filename) {
+return is_uploaded_file($filename);
+}
+/**
+* Prepare a URL for use in an HTML attribute. Strips harmful protocols.
+*/
+function check_url($uri) {
+return filter_xss_bad_protocol($uri, FALSE);
+}
+/**
+* @defgroup format Formatting
+* @{
+* Functions to format numbers, strings, dates, etc.
+*/
+/**
+* Formats an RSS channel.
+*
+* Arbitrary elements may be added using the $args associative array.
+*/
+function format_rss_channel($title, $link, $description, $items, $langcode = NULL, $args = array()) {
+global $language;
+$langcode = $langcode ? $langcode : $language->language;
+$output = "<channel>\n";
+$output .= ' <title>'. check_plain($title) ."</title>\n";
+$output .= ' <link>'. check_url($link) ."</link>\n";
+// The RSS 2.0 "spec" doesn't indicate HTML can be used in the description.
+// We strip all HTML tags, but need to prevent double encoding from properly
+// escaped source data (such as &amp becoming &amp;amp;).
+$output .= ' <description>'. check_plain(decode_entities(strip_tags($description))) ."</description>\n";
+$output .= ' <language>'. check_plain($langcode) ."</language>\n";
+$output .= format_xml_elements($args);
+$output .= $items;
+$output .= "</channel>\n";
+return $output;
+}
+/**
+* Format a single RSS item.
+*
+* Arbitrary elements may be added using the $args associative array.
+*/
+function format_rss_item($title, $link, $description, $args = array()) {
+$output = "<item>\n";
+$output .= ' <title>'. check_plain($title) ."</title>\n";
+$output .= ' <link>'. check_url($link) ."</link>\n";
+$output .= ' <description>'. check_plain($description) ."</description>\n";
+$output .= format_xml_elements($args);
+$output .= "</item>\n";
+return $output;
+}
+/**
+* Format XML elements.
+*
+* @param $array
+*   An array where each item represent an element and is either a:
+*   - (key => value) pair (<key>value</key>)
+*   - Associative array with fields:
+*     - 'key': element name
+*     - 'value': element contents
+*     - 'attributes': associative array of element attributes
+*
+* In both cases, 'value' can be a simple string, or it can be another array
+* with the same format as $array itself for nesting.
+*/
+function format_xml_elements($array) {
+$output = '';
+foreach ($array as $key => $value) {
+if (is_numeric($key)) {
+if ($value['key']) {
+$output .= ' <'. $value['key'];
+if (isset($value['attributes']) && is_array($value['attributes'])) {
+$output .= drupal_attributes($value['attributes']);
+}
+if ($value['value'] != '') {
+$output .= '>'. (is_array($value['value']) ? format_xml_elements($value['value']) : check_plain($value['value'])) .'</'. $value['key'] .">\n";
+}
+else {
+$output .= " />\n";
+}
+}
+}
+else {
+$output .= ' <'. $key .'>'. (is_array($value) ? format_xml_elements($value) : check_plain($value)) ."</$key>\n";
+}
+}
+return $output;
+}
+/**
+* Format a string containing a count of items.
+*
+* This function ensures that the string is pluralized correctly. Since t() is
+* called by this function, make sure not to pass already-localized strings to
+* it.
+*
+* For example:
+* @code
+*   $output = format_plural($node->comment_count, '1 comment', '@count comments');
+* @endcode
+*
+* Example with additional replacements:
+* @code
+*   $output = format_plural($update_count,
+*     'Changed the content type of 1 post from %old-type to %new-type.',
+*     'Changed the content type of @count posts from %old-type to %new-type.',
+*     array('%old-type' => $info->old_type, '%new-type' => $info->new_type)));
+* @endcode
+*
+* @param $count
+*   The item count to display.
+* @param $singular
+*   The string for the singular case. Please make sure it is clear this is
+*   singular, to ease translation (e.g. use "1 new comment" instead of "1 new").
+*   Do not use @count in the singular string.
+* @param $plural
+*   The string for the plural case. Please make sure it is clear this is plural,
+*   to ease translation. Use @count in place of the item count, as in "@count
+*   new comments".
+* @param $args
+*   An associative array of replacements to make after translation. Incidences
+*   of any key in this array are replaced with the corresponding value.
+*   Based on the first character of the key, the value is escaped and/or themed:
+*    - !variable: inserted as is
+*    - @variable: escape plain text to HTML (check_plain)
+*    - %variable: escape text and theme as a placeholder for user-submitted
+*      content (check_plain + theme_placeholder)
+*   Note that you do not need to include @count in this array.
+*   This replacement is done automatically for the plural case.
+* @param $langcode
+*   Optional language code to translate to a language other than
+*   what is used to display the page.
+* @return
+*   A translated string.
+*/
+function format_plural($count, $singular, $plural, $args = array(), $langcode = NULL) {
+$args['@count'] = $count;
+if ($count == 1) {
+return t($singular, $args, $langcode);
+}
+// Get the plural index through the gettext formula.
+$index = (function_exists('locale_get_plural')) ? locale_get_plural($count, $langcode) : -1;
+// Backwards compatibility.
+if ($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 < 1024) {
+return format_plural($size, '1 byte', '@count bytes', array(), $langcode);
+}
+else {
+$size = round($size / 1024, 2);
+$suffix = t('KB', array(), $langcode);
+if ($size >= 1024) {
+$size = round($size / 1024, 2);
+$suffix = t('MB', array(), $langcode);
+}
+return t('@size @suffix', array('@size' => $size, '@suffix' => $suffix), $langcode);
+}
+}
+/**
+* Format a time interval with the requested granularity.
+*
+* @param $timestamp
+*   The length of the interval in seconds.
+* @param $granularity
+*   How many different units to display in the string.
+* @param $langcode
+*   Optional language code to translate to a language other than
+*   what is used to display the page.
+* @return
+*   A translated string representation of the interval.
+*/
+function format_interval($timestamp, $granularity = 2, $langcode = NULL) {
+$units = array('1 year|@count years' => 31536000, '1 week|@count weeks' => 604800, '1 day|@count days' => 86400, '1 hour|@count hours' => 3600, '1 min|@count min' => 60, '1 sec|@count sec' => 1);
+$output = '';
+foreach ($units as $key => $value) {
+$key = explode('|', $key);
+if ($timestamp >= $value) {
+$output .= ($output ? ' ' : '') . format_plural(floor($timestamp / $value), $key[0], $key[1], array(), $langcode);
+$timestamp %= $value;
+$granularity--;
+}
+if ($granularity == 0) {
+break;
+}
+}
+return $output ? $output : t('0 sec', array(), $langcode);
+}
+/**
+* Format a date with the given configured format or a custom format string.
+*
+* Drupal allows administrators to select formatting strings for 'small',
+* 'medium' and 'large' date formats. This function can handle these formats,
+* as well as any custom format.
+*
+* @param $timestamp
+*   The exact date to format, as a UNIX timestamp.
+* @param $type
+*   The format to use. Can be "small", "medium" or "large" for the preconfigured
+*   date formats. If "custom" is specified, then $format is required as well.
+* @param $format
+*   A PHP date format string as required by date(). A backslash should be used
+*   before a character to avoid interpreting the character as part of a date
+*   format.
+* @param $timezone
+*   Time zone offset in seconds; if omitted, the user's time zone is used.
+* @param $langcode
+*   Optional language code to translate to a language other than what is used
+*   to display the page.
+* @return
+*   A translated date string in the requested format.
+*/
+function format_date($timestamp, $type = 'medium', $format = '', $timezone = NULL, $langcode = NULL) {
+if (!isset($timezone)) {
+global $user;
+if (variable_get('configurable_timezones', 1) && $user->uid && strlen($user->timezone)) {
+$timezone = $user->timezone;
+}
+else {
+$timezone = variable_get('date_default_timezone', 0);
+}
+}
+$timestamp += $timezone;
+switch ($type) {
+case 'small':
+$format = variable_get('date_format_short', 'm/d/Y - H:i');
+break;
+case 'large':
+$format = variable_get('date_format_long', 'l, F j, Y - H:i');
+break;
+case 'custom':
+// No change to format.
+break;
+case 'medium':
+default:
+$format = variable_get('date_format_medium', 'D, m/d/Y - H:i');
+}
+$max = strlen($format);
+$date = '';
+for ($i = 0; $i < $max; $i++) {
+$c = $format[$i];
+if (strpos('AaDlM', $c) !== FALSE) {
+$date .= t(gmdate($c, $timestamp), array(), $langcode);
+}
+else if ($c == 'F') {
+// Special treatment for long month names: May is both an abbreviation
+// and a full month name in English, but other languages have
+// different abbreviations.
+$date .= trim(t('!long-month-name '. gmdate($c, $timestamp), array('!long-month-name' => ''), $langcode));
+}
+else if (strpos('BdgGhHiIjLmnsStTUwWYyz', $c) !== FALSE) {
+$date .= gmdate($c, $timestamp);
+}
+else if ($c == 'r') {
+$date .= format_date($timestamp - $timezone, 'custom', 'D, d M Y H:i:s O', $timezone, $langcode);
+}
+else if ($c == 'O') {
+$date .= sprintf('%s%02d%02d', ($timezone < 0 ? '-' : '+'), abs($timezone / 3600), abs($timezone % 3600) / 60);
+}
+else if ($c == 'Z') {
+$date .= $timezone;
+}
+else if ($c == '\\') {
+$date .= $format[++$i];
+}
+else {
+$date .= $c;
+}
+}
+return $date;
+}
+/**
+* @} End of "defgroup format".
+*/
+/**
+* Generate a URL from a Drupal menu path. Will also pass-through existing URLs.
+*
+* @param $path
+*   The Drupal path being linked to, such as "admin/content/node", or an
+*   existing URL like "http://drupal.org/".  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, $options = array()) {
+// Merge in defaults.
+$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 $script;
+if (!isset($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' : '';
+}
+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 . $path);
+if (variable_get('clean_url', '0')) {
+// With Clean URLs.
+if ($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, $options = array()) {
+global $language;
+// Merge in defaults.
+$options += array(
+'attributes' => array(),
+'html' => FALSE,
+);
+// Append active class.
+if (($path == $_GET['q'] || ($path == '<front>' && drupal_is_front_page())) &&
+(empty($options['language']) || $options['language']->language == $language->language)) {
+if (isset($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');
+}
+/**
+* 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 $GLOBALS['base_path'];
+}
+/**
+* Provide a substitute clone() function for PHP4.
+*/
+function drupal_clone($object) {
+return version_compare(phpversion(), '5.0') < 0 ? $object : clone($object);
+}
+/**
+* Add a <link> tag to the page's HEAD.
+*/
+function drupal_add_link($attributes) {
+drupal_set_html_head('<link'. drupal_attributes($attributes) ." />\n");
+}
+/**
+* Adds a CSS file to the stylesheet queue.
+*
+* @param $path
+*   (optional) The path to the CSS file relative to the base_path(), e.g.,
+*   /modules/devel/devel.css.
+*
+*   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 $type
+*   (optional) The type of stylesheet that is being added. Types are: module
+*   or theme.
+* @param $media
+*   (optional) The media type for the stylesheet, e.g., all, print, screen.
+* @param $preprocess
+*   (optional) Should this CSS file be aggregated and compressed if this
+*   feature has been turned on under the performance section?
+*
+*   What does this actually mean?
+*   CSS preprocessing is the process of aggregating a bunch of separate CSS
+*   files into one file that is then compressed by removing all extraneous
+*   white space.
+*
+*   The reason for merging the CSS files is outlined quite thoroughly here:
+*   http://www.die.net/musings/page_load_time/
+*   "Load fewer external objects. Due to request overhead, one bigger file
+*   just loads faster than two smaller ones half its size."
+*
+*   However, you should *not* preprocess every file as this can lead to
+*   redundant caches. You should set $preprocess = FALSE when:
+*
+*     - Your styles are only used rarely on the site. This could be a special
+*       admin page, the homepage, or a handful of pages that does not represent
+*       the majority of the pages on your site.
+*
+*   Typical candidates for caching are for example styles for nodes across
+*   the site, or used in the theme.
+* @return
+*   An array of CSS files.
+*/
+function drupal_add_css($path = NULL, $type = 'module', $media = 'all', $preprocess = TRUE) {
+static $css = array();
+global $language;
+// Create an array of CSS files for each media type first, since each type needs to be served
+// to the browser differently.
+if (isset($path)) {
+// This check is necessary to ensure proper cascading of styles and is faster than an asort().
+if (!isset($css[$media])) {
+$css[$media] = array('module' => array(), 'theme' => array());
+}
+$css[$media][$type][$path] = $preprocess;
+// If the current language is RTL, add the CSS file with RTL overrides.
+if ($language->direction == LANGUAGE_RTL) {
+$rtl_path = str_replace('.css', '-rtl.css', $path);
+if (file_exists($rtl_path)) {
+$css[$media][$type][$rtl_path] = $preprocess;
+}
+}
+}
+return $css;
+}
+/**
+* Returns a themed representation of all stylesheets that should be attached to the page.
+*
+* It loads the CSS in order, with '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 . $query_string .'" />'."\n";
+}
+// If a CSS file is not to be preprocessed and it's a theme CSS file, it needs to *always* appear at the *bottom*,
+// regardless of whether preprocessing is on or off.
+else if (!$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 && $preprocess_css) {
+// Prefix filename to prevent blocking by firewalls which reject files
+// starting with "ad*".
+$filename = 'css_'. 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]) . $data;
+// Create the CSS file.
+file_save_data($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_delete', TRUE);
+}
+/**
+* Add a JavaScript file, setting or inline code to the page.
+*
+* The behavior of this function depends on the parameters it is called with.
+* Generally, it handles the addition of JavaScript to the page, either as
+* reference to an existing file or as inline code. The following actions can be
+* performed using this function:
+*
+* - Add a file ('core', 'module' and 'theme'):
+*   Adds a reference to a JavaScript file to the page. JavaScript files
+*   are placed in a certain order, from 'core' first, to 'module' and finally
+*   'theme' so that files, that are added later, can override previously added
+*   files with ease.
+*
+* - Add inline JavaScript code ('inline'):
+*   Executes a piece of JavaScript code on the current page by placing the code
+*   directly in the page. This can, for example, be useful to tell the user that
+*   a new message arrived, by opening a pop up, alert box etc.
+*
+* - Add settings ('setting'):
+*   Adds a setting to Drupal's global storage of JavaScript settings. Per-page
+*   settings are required by some modules to function properly. The settings
+*   will be accessible at Drupal.settings.
+*
+* @param $data
+*   (optional) If given, the value depends on the $type parameter:
+*   - 'core', 'module' or 'theme': Path to the file relative to base_path().
+*   - 'inline': The JavaScript code that should be placed in the given scope.
+*   - 'setting': An array with configuration options as associative array. The
+*       array is directly placed in Drupal.settings. You might want to wrap your
+*       actual configuration settings in another variable to prevent the pollution
+*       of the Drupal.settings namespace.
+* @param $type
+*   (optional) The type of JavaScript that should be added to the page. Allowed
+*   values are 'core', 'module', 'theme', 'inline' and 'setting'. You
+*   can, however, specify any value. It is treated as a reference to a JavaScript
+*   file. Defaults to 'module'.
+* @param $scope
+*   (optional) The location in which you want to place the script. Possible
+*   values are 'header' and 'footer' by default. If your theme implements
+*   different locations, however, you can also use these.
+* @param $defer
+*   (optional) If set to TRUE, the defer attribute is set on the <script> tag.
+*   Defaults to FALSE. This parameter is not used with $type == 'setting'.
+* @param $cache
+*   (optional) If set to FALSE, the JavaScript file is loaded anew on every page
+*   call, that means, it is not cached. Defaults to TRUE. Used only when $type
+*   references a JavaScript file.
+* @param $preprocess
+*   (optional) Should this JS file be aggregated if this
+*   feature has been turned on under the performance section?
+* @return
+*   If the first parameter is NULL, the JavaScript array that has been built so
+*   far for $scope is returned. If the first three parameters are NULL,
+*   an array with all scopes is returned.
+*/
+function drupal_add_js($data = NULL, $type = 'module', $scope = 'header', $defer = FALSE, $cache = TRUE, $preprocess = TRUE) {
+static $javascript = array();
+if (isset($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['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' => $defer);
+break;
+default:
+// If cache is FALSE, don't preprocess the JS file.
+$javascript[$scope][$type][$data] = array('cache' => $cache, 'defer' => $defer, 'preprocess' => (!$cache ? FALSE : $preprocess));
+}
+}
+if (isset($scope)) {
+if (isset($javascript[$scope])) {
+return $javascript[$scope];
+}
+else {
+return 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 $javascript
+*   (optional) An array with all JavaScript code. Defaults to the default
+*   JavaScript array for the given scope.
+* @return
+*   All JavaScript code segments and includes for the scope as HTML tags.
+*/
+function drupal_get_js($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, NULL, $scope);
+}
+if (empty($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($directory) && (variable_get('file_downloads', FILE_DOWNLOADS_PUBLIC) == FILE_DOWNLOADS_PUBLIC);
+// A dummy query-string is added to filenames, to gain control over
+// browser-caching. The string changes on every update or full cache
+// flush, forcing browsers to load a new copy of the files, as the
+// URL changed. Files that should not be cached (see drupal_add_js())
+// get time() as query-string instead, to enforce reload on every
+// page request.
+$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'] ? $query_string : '?'. time()) ."\"></script>\n";
+}
+else {
+$files[$path] = $info;
+}
+}
+}
+}
+// Aggregate any remaining JS files that haven't already been output.
+if ($is_writable && $preprocess_js && count($files) > 0) {
+// Prefix filename to prevent blocking by firewalls which reject files
+// starting with "ad*".
+$filename = 'js_'. md5(serialize($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_save_data($contents, $jspath .'/'. $filename, FILE_EXISTS_REPLACE);
+}
+return $jspath .'/'. $filename;
+}
+/**
+* Delete all cached JS files.
+*/
+function drupal_clear_js_cache() {
+file_scan_directory(file_create_path('js'), '.*', array('.', '..', 'CVS'), 'file_delete', TRUE);
+variable_set('javascript_parsed', array());
+}
+/**
+* Converts a PHP variable into its Javascript equivalent.
+*
+* We use HTML-safe strings, i.e. with <, > and & escaped.
+*/
+function drupal_to_js($var) {
+switch (gettype($var)) {
+case 'boolean':
+return $var ? 'true' : 'false'; // Lowercase necessary!
+case 'integer':
+case 'double':
+return $var;
+case 'resource':
+case 'string':
+return '"'. str_replace(array("\r", "\n", "<", ">", "&"),
+array('\r', '\n', '\x3c', '\x3e', '\x26'),
+addslashes($var)) .'"';
+case 'array':
+// Arrays in JSON can't be associative. If the array is empty or if it
+// has sequential whole number keys starting with 0, it's not associative
+// so we can go ahead and convert it as an array.
+if (empty ($var) || array_keys($var) === range(0, sizeof($var) - 1)) {
+$output = array();
+foreach ($var as $v) {
+$output[] = drupal_to_js($v);
+}
+return '[ '. implode(', ', $output) .' ]';
+}
+// Otherwise, fall through to convert the array as an object.
+case 'object':
+$output = array();
+foreach ($var as $k => $v) {
+$output[] = drupal_to_js(strval($k)) .': '. drupal_to_js($v);
+}
+return '{ '. implode(', ', $output) .' }';
+default:
+return 'null';
+}
+}
+/**
+* Return data in JSON format.
+*
+* This function should be used for JavaScript callback functions returning
+* data in JSON format. It sets the header for JavaScript output.
+*
+* @param $var
+*   (optional) If set, the variable will be converted to JSON and output.
+*/
+function drupal_json($var = NULL) {
+// We are returning JavaScript, so tell the browser.
+drupal_set_header('Content-Type: text/javascript; charset=utf-8');
+if (isset($var)) {
+echo drupal_to_js($var);
+}
+}
+/**
+* Wrapper around urlencode() which avoids Apache quirks.
+*
+* Should be used when placing arbitrary data in an URL. Note that Drupal paths
+* are urlencoded() when passed through url() and do not require urlencoding()
+* of individual components.
+*
+* Notes:
+* - For esthetic reasons, we do not escape slashes. This also avoids a 'feature'
+*   in Apache where it 404s on any path containing '%2F'.
+* - mod_rewrite unescapes %-encoded ampersands, hashes, and slashes when clean
+*   URLs are used, which are interpreted as delimiters by PHP. These
+*   characters are double escaped so PHP will still see the encoded version.
+* - With clean URLs, Apache changes '//' to '/', so every second slash is
+*   double escaped.
+*
+* @param $text
+*   String to encode
+*/
+function drupal_urlencode($text) {
+if (variable_get('clean_url', '0')) {
+return str_replace(array('%2F', '%26', '%23', '//'),
+array('/', '%2526', '%2523', '/%252F'),
+rawurlencode($text));
+}
+else {
+return str_replace('%2F', '/', rawurlencode($text));
+}
+}
+/**
+* Ensure the private key variable used to generate tokens is set.
+*
+* @return
+*   The private key.
+*/
+function drupal_get_private_key() {
+if (!($key = variable_get('drupal_private_key', 0))) {
+$key = md5(uniqid(mt_rand(), true)) . md5(uniqid(mt_rand(), true));
+variable_set('drupal_private_key', $key);
+}
+return $key;
+}
+/**
+* Generate a token based on $value, the current user session and private key.
+*
+* @param $value
+*   An additional value to base the token on.
+*/
+function drupal_get_token($value = '') {
+$private_key = drupal_get_private_key();
+return md5(session_id() . $value . $private_key);
+}
+/**
+* Validate a token based on $value, the current user session and private key.
+*
+* @param $token
+*   The token to be validated.
+* @param $value
+*   An additional value to base the token on.
+* @param $skip_anonymous
+*   Set to true to skip token validation for anonymous users.
+* @return
+*   True for a valid token, false for an invalid token. When $skip_anonymous
+*   is true, the return value will always be true for anonymous users.
+*/
+function drupal_valid_token($token, $value = '', $skip_anonymous = FALSE) {
+global $user;
+return (($skip_anonymous && $user->uid == 0) || ($token == md5(session_id() . $value . variable_get('drupal_private_key', ''))));
+}
+/**
+* Performs one or more XML-RPC request(s).
+*
+* @param $url
+*   An absolute URL of the XML-RPC endpoint.
+*     Example:
+*     http://www.example.com/xmlrpc.php
+* @param ...
+*   For one request:
+*     The method name followed by a variable number of arguments to the method.
+*   For multiple requests (system.multicall):
+*     An array of call arrays. Each call array follows the pattern of the single
+*     request: method name followed by the arguments to the method.
+* @return
+*   For one request:
+*     Either the return value of the method on success, or FALSE.
+*     If FALSE is returned, see xmlrpc_errno() and xmlrpc_error_msg().
+*   For multiple requests:
+*     An array of results. Each result will either be the result
+*     returned by the method called, or an xmlrpc_error object if the call
+*     failed. See xmlrpc_error().
+*/
+function xmlrpc($url) {
+require_once './includes/xmlrpc.inc';
+$args = func_get_args();
+return call_user_func_array('_xmlrpc', $args);
+}
+function _drupal_bootstrap_full() {
+static $called;
+if ($called) {
+return;
+}
+$called = 1;
+require_once './includes/theme.inc';
+require_once './includes/pager.inc';
+require_once './includes/menu.inc';
+require_once './includes/tablesort.inc';
+require_once './includes/file.inc';
+require_once './includes/unicode.inc';
+require_once './includes/image.inc';
+require_once './includes/form.inc';
+require_once './includes/mail.inc';
+require_once './includes/actions.inc';
+// Set the Drupal custom error handler.
+set_error_handler('drupal_error_handler');
+// Emit the correct charset HTTP header.
+drupal_set_header('Content-Type: text/html; charset=utf-8');
+// Detect string handling method
+unicode_check();
+// Undo magic quotes
+fix_gpc_magic();
+// Load all enabled modules
+module_load_all();
+// Let all modules take action before menu system handles the request
+// 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 && $_SERVER['REQUEST_METHOD'] == 'GET' && page_get_cache(TRUE)) {
+// This will fail in some cases, see page_get_cache() for the explanation.
+if ($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;
+}
+else if (zlib_get_coding_type() == FALSE) {
+$data = gzencode($data, 9, FORCE_GZIP);
+}
+// The remaining case is 'gzip' which means the data is
+// already compressed and nothing left to do but to store it.
+}
+ob_end_flush();
+if ($cache && $data) {
+cache_set($base_root . request_uri(), $data, 'cache_page', CACHE_TEMPORARY, drupal_get_headers());
+}
+}
+}
+}
+/**
+* Executes a cron run when called
+* @return
+* Returns TRUE if ran successfully
+*/
+function drupal_cron_run() {
+// If not in 'safe mode', increase the maximum execution time:
+if (!ini_get('safe_mode')) {
+set_time_limit(240);
+}
+// Fetch the cron semaphore
+$semaphore = variable_get('cron_semaphore', FALSE);
+if ($semaphore) {
+if (time() - $semaphore > 3600) {
+// Either cron has been running for more than an hour or the semaphore
+// was not reset due to a database error.
+watchdog('cron', 'Cron has been running for more than an hour and is most likely stuck.', array(), WATCHDOG_ERROR);
+// Release cron semaphore
+variable_del('cron_semaphore');
+}
+else {
+// Cron is still running normally.
+watchdog('cron', 'Attempting to re-run cron while it is already running.', array(), WATCHDOG_WARNING);
+}
+}
+else {
+// Register shutdown callback
+register_shutdown_function('drupal_cron_cleanup');
+// Lock cron semaphore
+variable_set('cron_semaphore', time());
+// Iterate through the modules calling their cron handlers (if any):
+module_invoke_all('cron');
+// Record cron time
+variable_set('cron_last', time());
+watchdog('cron', 'Cron run completed.', array(), WATCHDOG_NOTICE);
+// Release cron semaphore
+variable_del('cron_semaphore');
+// Return TRUE so other functions can check if it did run successfully
+return TRUE;
+}
+}
+/**
+* Shutdown function for cron cleanup.
+*/
+function drupal_cron_cleanup() {
+// See if the semaphore is still locked.
+if (variable_get('cron_semaphore', FALSE)) {
+watchdog('cron', 'Cron run exceeded the time limit and was aborted.', array(), WATCHDOG_WARNING);
+// Release cron semaphore
+variable_del('cron_semaphore');
+}
+}
+/**
+* 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 regular expression of the files to find.
+* @param $directory
+*   The subdirectory name in which the files are found. For example,
+*   'modules' will search in both modules/ and
+*   sites/somesite/modules/.
+* @param $key
+*   The key to be passed to file_scan_directory().
+* @param $min_depth
+*   Minimum depth of directories to return files from.
+*
+* @return
+*   An array of file objects of the specified type.
+*/
+function drupal_system_listing($mask, $directory, $key = 'name', $min_depth = 1) {
+global $profile;
+$config = conf_path();
+// When this function is called during Drupal's initial installation process,
+// the name of the profile that's about to be installed is stored in the global
+// $profile variable. At all other times, the standard Drupal systems variable
+// table contains the name of the current profile, and we can call variable_get()
+// to determine what one is active.
+if (!isset($profile)) {
+$profile = variable_get('install_profile', 'default');
+}
+$searchdir = array($directory);
+$files = array();
+// Always search sites/all/* as well as the global directories
+$searchdir[] = 'sites/all/'. $directory;
+// The 'profiles' directory contains pristine collections of modules and
+// themes as organized by a distribution.  It is pristine in the same way
+// that /modules is pristine for core; users should avoid changing anything
+// there in favor of sites/all or sites/<domain> directories.
+if (file_exists("profiles/$profile/$directory")) {
+$searchdir[] = "profiles/$profile/$directory";
+}
+if (file_exists("$config/$directory")) {
+$searchdir[] = "$config/$directory";
+}
+// Get current list of items
+foreach ($searchdir as $dir) {
+$files = array_merge($files, file_scan_directory($dir, $mask, array('.', '..', 'CVS'), 0, TRUE, $key, $min_depth));
+}
+return $files;
+}
+/**
+* This dispatch function hands off structured Drupal arrays to type-specific
+* *_alter implementations. It ensures a consistent interface for all altering
+* operations.
+*
+* @param $type
+*   The data type of the structured array. 'form', 'links',
+*   'node_content', and so on are several examples.
+* @param $data
+*   The structured array to be altered.
+* @param ...
+*   Any additional params will be passed on to the called
+*   hook_$type_alter functions.
+*/
+function drupal_alter($type, &$data) {
+// 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 $function) {
+if (function_exists($function)) {
+$elements = $function($elements);
+}
+}
+}
+$content = '';
+// Either the elements did not go through form_builder or one of the children
+// has a #weight.
+if (!isset($elements['#sorted'])) {
+uasort($elements, "element_sort");
+}
+$elements += array('#title' => NULL, '#description' => NULL);
+if (!isset($elements['#children'])) {
+$children = element_children($elements);
+// Render all the children that use a theme function.
+if (isset($elements['#theme']) && empty($elements['#theme_used'])) {
+$elements['#theme_used'] = TRUE;
+$previous = array();
+foreach (array('#value', '#type', '#prefix', '#suffix') as $key) {
+$previous[$key] = isset($elements[$key]) ? $elements[$key] : NULL;
+}
+// If we rendered a single element, then we will skip the renderer.
+if (empty($children)) {
+$elements['#printed'] = TRUE;
+}
+else {
+$elements['#value'] = '';
+}
+$elements['#type'] = 'markup';
+unset($elements['#prefix'], $elements['#suffix']);
+$content = theme($elements['#theme'], $elements);
+foreach (array('#value', '#type', '#prefix', '#suffix') as $key) {
+$elements[$key] = isset($previous[$key]) ? $previous[$key] : NULL;
+}
+}
+// Render each of the children using drupal_render and concatenate them.
+if (!isset($content) || $content === '') {
+foreach ($children as $key) {
+$content .= drupal_render($elements[$key]);
+}
+}
+}
+if (isset($content) && $content !== '') {
+$elements['#children'] = $content;
+}
+// Until now, we rendered the children, here we render the element itself
+if (!isset($elements['#printed'])) {
+$content = theme(!empty($elements['#type']) ? $elements['#type'] : 'markup', $elements);
+$elements['#printed'] = TRUE;
+}
+if (isset($content) && $content !== '') {
+// Filter the outputted content and make any last changes before the
+// content is sent to the browser. The changes are made on $content
+// which allows the output'ed text to be filtered.
+if (isset($elements['#post_render'])) {
+foreach ($elements['#post_render'] as $function) {
+if (function_exists($function)) {
+$content = $function($content, $elements);
+}
+}
+}
+$prefix = isset($elements['#prefix']) ? $elements['#prefix'] : '';
+$suffix = isset($elements['#suffix']) ? $elements['#suffix'] : '';
+return $prefix . $content . $suffix;
+}
+}
+/**
+* Function used by uasort to sort structured arrays by weight.
+*/
+function element_sort($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',
+),
+'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
+* @{
+*/
+/**
+* Get the schema definition of a table, or the whole database schema.
+*
+* The returned schema will include any modifications made by any
+* module that implements hook_schema_alter().
+*
+* @param $table
+*   The name of the table. If not given, the schema of all tables is returned.
+* @param $rebuild
+*   If true, the schema will be rebuilt instead of retrieved from the cache.
+*/
+function drupal_get_schema($table = NULL, $rebuild = FALSE) {
+static $schema = array();
+if (empty($schema) || $rebuild) {
+// Try to load the schema from cache.
+if (!$rebuild && $cached = cache_get('schema')) {
+$schema = $cached->data;
+}
+// Otherwise, rebuild the schema cache.
+else {
+$schema = array();
+// Load the .install files to get hook_schema.
+module_load_all_includes('install');
+// Invoke hook_schema for all modules.
+foreach (module_implements('schema') as $module) {
+$current = module_invoke($module, 'schema');
+_drupal_initialize_schema($module, $current);
+$schema = array_merge($schema, $current);
+}
+drupal_alter('schema', $schema);
+cache_set('schema', $schema);
+}
+}
+if (!isset($table)) {
+return $schema;
+}
+elseif (isset($schema[$table])) {
+return $schema[$table];
+}
+else {
+return FALSE;
+}
+}
+/**
+* Create all tables that a module defines in its hook_schema().
+*
+* Note: This function does not pass the module's schema through
+* hook_schema_alter(). The module's tables will be created exactly as the
+* module defines them.
+*
+* @param $module
+*   The module for which the tables will be created.
+* @return
+*   An array of arrays with the following key/value pairs:
+*    - success: a boolean indicating whether the query succeeded.
+*    - query: the SQL query(s) executed, passed through check_plain().
+*/
+function drupal_install_schema($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 $table) {
+db_drop_table($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_include('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 $update
+*   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, $update = array()) {
+// Standardize $update to an array.
+if (is_string($update)) {
+$update = array($update);
+}
+$schema = drupal_get_schema($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 = $defs = $values = $serials = $placeholders = array();
+// Go through our schema, build SQL, and when inserting, fill in defaults for
+// fields that are not set.
+foreach ($schema['fields'] as $field => $info) {
+// Special case -- skip serial types if we are updating.
+if ($info['type'] == 'serial' && count($update)) {
+continue;
+}
+// For inserts, populate defaults from Schema if not already provided
+if (!isset($object->$field) && !count($update) && isset($info['default'])) {
+$object->$field = $info['default'];
+}
+// Track serial fields so we can helpfully populate them after the query.
+if ($info['type'] == 'serial') {
+$serials[] = $field;
+// Ignore values for serials when inserting data. Unsupported.
+unset($object->$field);
+}
+// Build arrays for the fields, placeholders, and values in our query.
+if (isset($object->$field)) {
+$fields[] = $field;
+$placeholders[] = db_type_placeholder($info['type']);
+if (empty($info['serialize'])) {
+$values[] = $object->$field;
+}
+else {
+$values[] = serialize($object->$field);
+}
+}
+}
+// Build the SQL.
+$query = '';
+if (!count($update)) {
+$query = "INSERT INTO {". $table ."} (". implode(', ', $fields) .') VALUES ('. implode(', ', $placeholders) .')';
+$return = SAVED_NEW;
+}
+else {
+$query = '';
+foreach ($fields as $id => $field) {
+if ($query) {
+$query .= ', ';
+}
+$query .= $field .' = '. $placeholders[$id];
+}
+foreach ($update as $key){
+$conditions[] = "$key = ". db_type_placeholder($schema['fields'][$key]['type']);
+$values[] = $object->$key;
+}
+$query = "UPDATE {". $table ."} SET $query WHERE ". implode(' AND ', $conditions);
+$return = SAVED_UPDATED;
+}
+// Execute the SQL.
+if (db_query($query, $values)) {
+if ($serials) {
+// Get last insert ids and fill them in.
+foreach ($serials as $field) {
+$object->$field = db_last_insert_id($table, $field);
+}
+}
+}
+else {
+$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 - optional
+*   version = VERSION
+* @endverbatim
+*
+* @param $filename
+*   The file we are parsing. Accepts file with relative or absolute path.
+* @return
+*   The info array.
+*/
+function drupal_parse_info_file($filename) {
+$info = array();
+if (!file_exists($filename)) {
+return $info;
+}
+$data = file_get_contents($filename);
+if (preg_match_all('
+@^\s*                           # Start at the beginning of a line, ignoring leading whitespace
+((?:
+[^=;\[\]]|                    # Key names cannot contain equal signs, semi-colons or square brackets,
+\[[^\[\]]*\]                  # unless they are balanced and not nested
+)+?)
+\s*=\s*                         # Key/value pairs are separated by equal signs (ignoring white-space)
+(?:
+("(?:[^"]|(?<=\\\\)")*")|     # Double-quoted string, which may contain slash-escaped quotes/slashes
+(\'(?:[^\']|(?<=\\\\)\')*\')| # Single-quoted string, which may contain slash-escaped quotes/slashes
+([^\r\n]*?)                   # Non-quoted string
+)\s*$                           # Stop at the next end of a line, ignoring trailing whitespace
+@msx', $data, $matches, PREG_SET_ORDER)) {
+foreach ($matches as $match) {
+// Fetch the key and value string
+$i = 0;
+foreach (array('key', 'value1', 'value2', 'value3') as $var) {
+$$var = isset($match[++$i]) ? $match[$i] : '';
+}
+$value = stripslashes(substr($value1, 1, -1)) . stripslashes(substr($value2, 1, -1)) . $value3;
+// Parse array syntax
+$keys = preg_split('/\]?\[/', rtrim($key, ']'));
+$last = array_pop($keys);
+$parent = &$info;
+// Create nested arrays
+foreach ($keys as $key) {
+if ($key == '') {
+$key = count($parent);
+}
+if (!isset($parent[$key]) || !is_array($parent[$key])) {
+$parent[$key] = array();
+}
+$parent = &$parent[$key];
+}
+// Handle PHP constants
+if (defined($value)) {
+$value = constant($value);
+}
+// Insert actual value
+if ($last == '') {
+$last = count($parent);
+}
+$parent[$last] = $value;
+}
+}
+return $info;
+}
+/**
+* @return
+*   Array of the possible severity levels for log messages.
+*
+* @see watchdog
+*/
+function watchdog_severity_levels() {
+return array(
+WATCHDOG_EMERG    => t('emergency'),
+WATCHDOG_ALERT    => t('alert'),
+WATCHDOG_CRITICAL => t('critical'),
+WATCHDOG_ERROR    => t('error'),
+WATCHDOG_WARNING  => t('warning'),
+WATCHDOG_NOTICE   => t('notice'),
+WATCHDOG_INFO     => t('info'),
+WATCHDOG_DEBUG    => t('debug'),
+);
+}
+/**
+* Explode a string of given tags into an array.
+*/
+function drupal_explode_tags($tags) {
+// This regexp allows the following types of user input:
+// this, "somecompany, llc", "and ""this"" w,o.rks", foo bar
+$regexp = '%(?:^|,\ *)("(?>[^"]*)(?>""[^"]* )*"|(?: [^",]*))%x';
+preg_match_all($regexp, $tags, $matches);
+$typed_tags = array_unique($matches[1]);
+$tags = array();
+foreach ($typed_tags as $tag) {
+// If a user has escaped a term (to demonstrate that it is a group,
+// or includes a comma or quote character), we remove the escape
+// formatting so to save the term into the database as the user intends.
+$tag = trim(str_replace('""', '"', preg_replace('/^"(.*)"$/', '\1', $tag)));
+if ($tag != "") {
+$tags[] = $tag;
+}
+}
+return $tags;
+}
+/**
+* Implode an array of tags into a string.
+*/
+function drupal_implode_tags($tags) {
+$encoded_tags = array();
+foreach ($tags as $tag) {
+// Commas and quotes in tag names are special cases, so encode them.
+if (strpos($tag, ',') !== FALSE || strpos($tag, '"') !== FALSE) {
+$tag = '"'. str_replace('"', '""', $tag) .'"';
+}
+$encoded_tags[] = $tag;
+}
+return implode(', ', $encoded_tags);
+}
+/**
+* Flush all cached data on the site.
+*
+* Empties cache tables, rebuilds the menu cache and theme registries, and
+* invokes a hook so that other modules' cache data can be cleared as well.
+*/
+function drupal_flush_all_caches() {
+// Change query-strings on css/js files to enforce reload for all users.
+_drupal_flush_css_js();
+drupal_clear_css_cache();
+drupal_clear_js_cache();
+// If invoked from update.php, we must not update the theme information in the
+// database, or this will result in all themes being disabled.
+if (defined('MAINTENANCE_MODE') && MAINTENANCE_MODE == 'update') {
+_system_theme_data();
+}
+else {
+system_theme_data();
+}
+drupal_rebuild_theme_registry();
+menu_rebuild();
+node_types_rebuild();
+// Don't clear cache_form - in-progress form submissions may break.
+// Ordered so clearing the page cache will always be the last action.
+$core = array('cache', 'cache_block', 'cache_filter', 'cache_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 = $string_history[0];
+// Not including 'q' to allow certain JavaScripts to re-use query string.
+$characters = 'abcdefghijklmnoprstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+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));
+}

branch	drupal
changeset 74	0ff3ba646492