Adding pre-patched common.inc and patch file for it.

patches/common.inc.5.0

+<?php
+// $Id$
+
+/**
+ * @file
+ * Common functions that many Drupal modules will need to reference.
+ *
+ * The functions that are critical and need to be available even when serving
+ * a cached page are instead located in bootstrap.inc.
+ */
+
+/**
+ * Return status for saving which involved creating a new item.
+ */
+define('SAVED_NEW', 1);
+
+/**
+ * Return status for saving which involved an update to an existing item.
+ */
+define('SAVED_UPDATED', 2);
+
+/**
+ * Return status for saving which deleted an existing item.
+ */
+define('SAVED_DELETED', 3);
+
+/**
+ * Set content for a specified region.
+ *
+ * @param $region
+ *   Page region the content is assigned to.
+ *
+ * @param $data
+ *   Content to be set.
+ */
+function drupal_set_content($region = NULL, $data = NULL) {
+  static $content = array();
+
+  if (!is_null($region) && !is_null($data)) {
+    $content[$region][] = $data;
+  }
+  return $content;
+}
+
+/**
+ * Get assigned content.
+ *
+ * @param $region
+ *   A specified region to fetch content for. If NULL, all regions will be returned.
+ *
+ * @param $delimiter
+ *   Content to be inserted between exploded array elements.
+ */
+function drupal_get_content($region = NULL, $delimiter = ' ') {
+  $content = drupal_set_content();
+  if (isset($region)) {
+    if (isset($content[$region]) && is_array($content[$region])) {
+      return implode($delimiter, $content[$region]);
+    }
+  }
+  else {
+    foreach (array_keys($content) as $region) {
+      if (is_array($content[$region])) {
+        $content[$region] = implode($delimiter, $content[$region]);
+      }
+    }
+    return $content;
+  }
+}
+
+/**
+ * Set the breadcrumb trail for the current page.
+ *
+ * @param $breadcrumb
+ *   Array of links, starting with "home" and proceeding up to but not including
+ *   the current page.
+ */
+function drupal_set_breadcrumb($breadcrumb = NULL) {
+  static $stored_breadcrumb;
+
+  if (!is_null($breadcrumb)) {
+    $stored_breadcrumb = $breadcrumb;
+  }
+  return $stored_breadcrumb;
+}
+
+/**
+ * Get the breadcrumb trail for the current page.
+ */
+function drupal_get_breadcrumb() {
+  $breadcrumb = drupal_set_breadcrumb();
+
+  if (is_null($breadcrumb)) {
+    $breadcrumb = menu_get_active_breadcrumb();
+  }
+
+  return $breadcrumb;
+}
+
+/**
+ * Add output to the head tag of the HTML page.
+ * This function can be called as long the headers aren't sent.
+ */
+function drupal_set_html_head($data = NULL) {
+  static $stored_head = '';
+
+  if (!is_null($data)) {
+    $stored_head .= $data ."\n";
+  }
+  return $stored_head;
+}
+
+/**
+ * Retrieve output to be displayed in the head tag of the HTML page.
+ */
+function drupal_get_html_head() {
+  $output = "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n";
+  return $output . drupal_set_html_head();
+}
+
+/**
+ * Reset the static variable which holds the aliases mapped for this request.
+ */
+function drupal_clear_path_cache() {
+  drupal_lookup_path('wipe');
+}
+
+/**
+ * Set an HTTP response header for the current page.
+ *
+ * Note: when sending a Content-Type header, always include a 'charset' type
+ * too. This is necessary to avoid security bugs (e.g. UTF-7 XSS).
+ */
+function drupal_set_header($header = NULL) {
+  // We use an array to guarantee there are no leading or trailing delimiters.
+  // Otherwise, header('') could get called when serving the page later, which
+  // ends HTTP headers prematurely on some PHP versions.
+  static $stored_headers = array();
+
+  if (strlen($header)) {
+    header($header);
+    $stored_headers[] = $header;
+  }
+  return implode("\n", $stored_headers);
+}
+
+/**
+ * Get the HTTP response headers for the current page.
+ */
+function drupal_get_headers() {
+  return drupal_set_header();
+}
+
+/**
+ * Add a feed URL for the current page.
+ *
+ * @param $url
+ *   The url for the feed
+ * @param $title
+ *   The title of the feed
+ */
+function drupal_add_feed($url = NULL, $title = '') {
+  static $stored_feed_links = array();
+
+  if (!is_null($url)) {
+    $stored_feed_links[$url] = theme('feed_icon', $url);
+
+    drupal_add_link(array('rel' => 'alternate',
+                          'type' => 'application/rss+xml',
+                          'title' => $title,
+                          'href' => $url));
+  }
+  return $stored_feed_links;
+}
+
+/**
+ * Get the feed URLs for the current page.
+ *
+ * @param $delimiter
+ *   The delimiter to split feeds by
+ */
+function drupal_get_feeds($delimiter = "\n") {
+  $feeds = drupal_add_feed();
+  return implode($feeds, $delimiter);
+}
+
+/**
+ * @name HTTP handling
+ * @{
+ * Functions to properly handle HTTP responses.
+ */
+
+/**
+ * Parse an array into a valid urlencoded query string.
+ *
+ * @param $query
+ *   The array to be processed e.g. $_GET
+ * @param $exclude
+ *   The array filled with keys to be excluded. Use parent[child] to exclude nested items.
+ * @param $urlencode
+ *   If TRUE, the keys and values are both urlencoded.
+ * @param $parent
+ *   Should not be passed, only used in recursive calls
+ * @return
+ *   urlencoded string which can be appended to/as the URL query string
+ */
+function drupal_query_string_encode($query, $exclude = array(), $parent = '') {
+  $params = array();
+
+  foreach ($query as $key => $value) {
+    $key = drupal_urlencode($key);
+    if ($parent) {
+      $key = $parent .'['. $key .']';
+    }
+
+    if (in_array($key, $exclude)) {
+      continue;
+    }
+
+    if (is_array($value)) {
+      $params[] = drupal_query_string_encode($value, $exclude, $key);
+    }
+    else {
+      $params[] = $key .'='. drupal_urlencode($value);
+    }
+  }
+
+  return implode('&', $params);
+}
+
+/**
+ * Prepare a destination query string for use in combination with
+ * drupal_goto(). Used to direct the user back to the referring page
+ * after completing a form. By default the current URL is returned.
+ * If a destination exists in the previous request, that destination
+ * is returned. As such, a destination can persist across multiple
+ * pages.
+ *
+ * @see drupal_goto()
+ */
+function drupal_get_destination() {
+  if (isset($_REQUEST['destination'])) {
+    return 'destination='. urlencode($_REQUEST['destination']);
+  }
+  else {
+    // Use $_GET here to retrieve the original path in source form.
+    $path = isset($_GET['q']) ? $_GET['q'] : '';
+    $query = drupal_query_string_encode($_GET, array('q'));
+    if ($query != '') {
+      $path .= '?'. $query;
+    }
+    return 'destination='. urlencode($path);
+  }
+}
+
+/**
+ * Send the user to a different Drupal page.
+ *
+ * This issues an on-site HTTP redirect. The function makes sure the redirected
+ * URL is formatted correctly.
+ *
+ * Usually the redirected URL is constructed from this function's input
+ * parameters. However you may override that behavior by setting a
+ * <em>destination</em> in either the $_REQUEST-array (i.e. by using
+ * the query string of an URI) or the $_REQUEST['edit']-array (i.e. by
+ * using a hidden form field). This is used to direct the user back to
+ * the proper page after completing a form. For example, after editing
+ * a post on the 'admin/content/node'-page or after having logged on using the
+ * 'user login'-block in a sidebar. The function drupal_get_destination()
+ * can be used to help set the destination URL.
+ *
+ * It is advised to use drupal_goto() instead of PHP's header(), because
+ * drupal_goto() will append the user's session ID to the URI when PHP is
+ * compiled with "--enable-trans-sid".
+ *
+ * This function ends the request; use it rather than a print theme('page')
+ * statement in your menu callback.
+ *
+ * @param $path
+ *   A Drupal path or a full URL.
+ * @param $query
+ *   The query string component, if any.
+ * @param $fragment
+ *   The destination fragment identifier (named anchor).
+ * @param $http_response_code
+ *   Valid values for an actual "goto" as per RFC 2616 section 10.3 are:
+ *   - 301 Moved Permanently (the recommended value for most redirects)
+ *   - 302 Found (default in Drupal and PHP, sometimes used for spamming search
+ *         engines)
+ *   - 303 See Other
+ *   - 304 Not Modified
+ *   - 305 Use Proxy
+ *   - 307 Temporary Redirect (an alternative to "503 Site Down for Maintenance")
+ *   Note: Other values are defined by RFC 2616, but are rarely used and poorly
+ *         supported.
+ * @see drupal_get_destination()
+ */
+function drupal_goto($path = '', $query = NULL, $fragment = NULL, $http_response_code = 302) {
+  if (isset($_REQUEST['destination'])) {
+    extract(parse_url(urldecode($_REQUEST['destination'])));
+  }
+  else if (isset($_REQUEST['edit']['destination'])) {
+    extract(parse_url(urldecode($_REQUEST['edit']['destination'])));
+  }
+
+  $url = url($path, $query, $fragment, TRUE);
+
+  // Before the redirect, allow modules to react to the end of the page request.
+  module_invoke_all('exit', $url);
+
+  header('Location: '. $url, TRUE, $http_response_code);
+
+  // The "Location" header sends a REDIRECT status code to the http
+  // daemon. In some cases this can go wrong, so we make sure none
+  // of the code below the drupal_goto() call gets executed when we redirect.
+  exit();
+}
+
+/**
+ * Generates a site off-line message
+ */
+function drupal_site_offline() {
+  drupal_set_header('HTTP/1.1 503 Service unavailable');
+  drupal_set_title(t('Site off-line'));
+  print theme('maintenance_page', filter_xss_admin(variable_get('site_offline_message',
+    t('@site is currently under maintenance. We should be back shortly. Thank you for your patience.', array('@site' => variable_get('site_name', 'Drupal'))))));
+}
+
+/**
+ * Generates a 404 error if the request can not be handled.
+ */
+function drupal_not_found() {
+  drupal_set_header('HTTP/1.1 404 Not Found');
+
+  watchdog('page not found', check_plain($_GET['q']), WATCHDOG_WARNING);
+
+  // Keep old path for reference
+  if (!isset($_REQUEST['destination'])) {
+    $_REQUEST['destination'] = $_GET['q'];
+  }
+
+  $path = drupal_get_normal_path(variable_get('site_404', ''));
+  if ($path && $path != $_GET['q']) {
+    menu_set_active_item($path);
+    $return = menu_execute_active_handler();
+  }
+  else {
+    // Redirect to a non-existent menu item to make possible tabs disappear.
+    menu_set_active_item('');
+  }
+
+  if (empty($return)) {
+    drupal_set_title(t('Page not 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']), WATCHDOG_WARNING);
+
+// Keep old path for reference
+  if (!isset($_REQUEST['destination'])) {
+    $_REQUEST['destination'] = $_GET['q'];
+  }
+
+  $_SESSION['destination'] = $_GET['q'];
+
+  $path = drupal_get_normal_path(variable_get('site_403', ''));
+  if ($path && $path != $_GET['q']) {
+    menu_set_active_item($path);
+    $return = menu_execute_active_handler();
+  }
+  else {
+    // Redirect to a non-existent menu item to make possible tabs disappear.
+    menu_set_active_item('');
+  }
+
+  if (empty($return)) {
+    drupal_set_title(t('Access denied'));
+    $return = t('You are not authorized to access this page.');
+  }
+  print theme('page', $return);
+}
+
+/**
+ * Perform an HTTP request.
+ *
+ * This is a flexible and powerful HTTP client implementation. Correctly handles
+ * GET, POST, PUT or any other HTTP requests. Handles redirects.
+ *
+ * @param $url
+ *   A string containing a fully qualified URI.
+ * @param $headers
+ *   An array containing an HTTP header => value pair.
+ * @param $method
+ *   A string defining the HTTP request to use.
+ * @param $data
+ *   A string containing data to include in the request.
+ * @param $retry
+ *   An integer representing how many times to retry the request in case of a
+ *   redirect.
+ * @return
+ *   An object containing the HTTP request headers, response code, headers,
+ *   data, and redirect status.
+ */
+function drupal_http_request($url, $headers = array(), $method = 'GET', $data = NULL, $retry = 3) {
+  $result = new stdClass();
+
+  // Parse the URL, and make sure we can handle the schema.
+  $uri = parse_url($url);
+  switch ($uri['scheme']) {
+    case 'http':
+      $port = isset($uri['port']) ? $uri['port'] : 80;
+      $host = $uri['host'] . ($port != 80 ? ':'. $port : '');
+      $fp = @fsockopen($uri['host'], $port, $errno, $errstr, 15);
+      break;
+    case 'https':
+      // Note: Only works for PHP 4.3 compiled with OpenSSL.
+      $port = isset($uri['port']) ? $uri['port'] : 443;
+      $host = $uri['host'] . ($port != 443 ? ':'. $port : '');
+      $fp = @fsockopen('ssl://'. $uri['host'], $port, $errno, $errstr, 20);
+      break;
+    default:
+      $result->error = 'invalid schema '. $uri['scheme'];
+      return $result;
+  }
+
+  // Make sure the socket opened properly.
+  if (!$fp) {
+    $result->error = trim($errno .' '. $errstr);
+    return $result;
+  }
+
+  // Construct the path to act on.
+  $path = isset($uri['path']) ? $uri['path'] : '/';
+  if (isset($uri['query'])) {
+    $path .= '?'. $uri['query'];
+  }
+
+  // Create HTTP request.
+  $defaults = array(
+    // RFC 2616: "non-standard ports MUST, default ports MAY be included".
+    // We don't add the port to prevent from breaking rewrite rules checking
+    // the host that do not take into account the port number.
+    'Host' => "Host: $host",
+    'User-Agent' => 'User-Agent: Drupal (+http://drupal.org/)',
+    'Content-Length' => 'Content-Length: '. strlen($data)
+  );
+
+  foreach ($headers as $header => $value) {
+    $defaults[$header] = $header .': '. $value;
+  }
+
+  $request = $method .' '. $path ." HTTP/1.0\r\n";
+  $request .= implode("\r\n", $defaults);
+  $request .= "\r\n\r\n";
+  if ($data) {
+    $request .= $data ."\r\n";
+  }
+  $result->request = $request;
+
+  fwrite($fp, $request);
+
+  // Fetch response.
+  $response = '';
+  while (!feof($fp) && $chunk = fread($fp, 1024)) {
+    $response .= $chunk;
+  }
+  fclose($fp);
+
+  // Parse response.
+  list($split, $result->data) = explode("\r\n\r\n", $response, 2);
+  $split = preg_split("/\r\n|\n|\r/", $split);
+
+  list($protocol, $code, $text) = explode(' ', trim(array_shift($split)), 3);
+  $result->headers = array();
+
+  // Parse headers.
+  while ($line = trim(array_shift($split))) {
+    list($header, $value) = explode(':', $line, 2);
+    if (isset($result->headers[$header]) && $header == 'Set-Cookie') {
+      // RFC 2109: the Set-Cookie response header comprises the token Set-
+      // Cookie:, followed by a comma-separated list of one or more cookies.
+      $result->headers[$header] .= ','. trim($value);
+    }
+    else {
+      $result->headers[$header] = trim($value);
+    }
+  }
+
+  $responses = array(
+    100 => 'Continue', 101 => 'Switching Protocols',
+    200 => 'OK', 201 => 'Created', 202 => 'Accepted', 203 => 'Non-Authoritative Information', 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content',
+    300 => 'Multiple Choices', 301 => 'Moved Permanently', 302 => 'Found', 303 => 'See Other', 304 => 'Not Modified', 305 => 'Use Proxy', 307 => 'Temporary Redirect',
+    400 => 'Bad Request', 401 => 'Unauthorized', 402 => 'Payment Required', 403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed', 406 => 'Not Acceptable', 407 => 'Proxy Authentication Required', 408 => 'Request Time-out', 409 => 'Conflict', 410 => 'Gone', 411 => 'Length Required', 412 => 'Precondition Failed', 413 => 'Request Entity Too Large', 414 => 'Request-URI Too Large', 415 => 'Unsupported Media Type', 416 => 'Requested range not satisfiable', 417 => 'Expectation Failed',
+    500 => 'Internal Server Error', 501 => 'Not Implemented', 502 => 'Bad Gateway', 503 => 'Service Unavailable', 504 => 'Gateway Time-out', 505 => 'HTTP Version not supported'
+  );
+  // RFC 2616 states that all unknown HTTP codes must be treated the same as
+  // the base code in their class.
+  if (!isset($responses[$code])) {
+    $code = floor($code / 100) * 100;
+  }
+
+  switch ($code) {
+    case 200: // OK
+    case 304: // Not modified
+      break;
+    case 301: // Moved permanently
+    case 302: // Moved temporarily
+    case 307: // Moved temporarily
+      $location = $result->headers['Location'];
+
+      if ($retry) {
+        $result = drupal_http_request($result->headers['Location'], $headers, $method, $data, --$retry);
+        $result->redirect_code = $result->code;
+      }
+      $result->redirect_url = $location;
+
+      break;
+    default:
+      $result->error = $text;
+  }
+
+  $result->code = $code;
+  return $result;
+}
+/**
+ * @} End of "HTTP handling".
+ */
+
+/**
+ * Log errors as defined by administrator
+ * Error levels:
+ *  0 = Log errors to database.
+ *  1 = Log errors to database and to screen.
+ */
+function error_handler($errno, $message, $filename, $line) {
+  // If the @ error suppression operator was used, error_reporting is temporarily set to 0
+  if (error_reporting() == 0) {
+    return;
+  }
+
+  if ($errno & (E_ALL ^ E_NOTICE)) {
+    $types = array(1 => 'error', 2 => 'warning', 4 => 'parse error', 8 => 'notice', 16 => 'core error', 32 => 'core warning', 64 => 'compile error', 128 => 'compile warning', 256 => 'user error', 512 => 'user warning', 1024 => 'user notice', 2048 => 'strict warning');
+    $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['PHP_SELF'], 'update.php')) {
+      drupal_set_message($entry, 'error');
+    }
+
+    watchdog('php', t('%message in %file on line %line.', array('%error' => $types[$errno], '%message' => $message, '%file' => $filename, '%line' => $line)), WATCHDOG_ERROR);
+  }
+}
+
+function _fix_gpc_magic(&$item) {
+  if (is_array($item)) {
+    array_walk($item, '_fix_gpc_magic');
+  }
+  else {
+    $item = stripslashes($item);
+  }
+}
+
+/**
+ * Helper function to strip slashes from $_FILES skipping over the tmp_name keys
+ * since PHP generates single backslashes for file paths on Windows systems.
+ *
+ * tmp_name does not have backslashes added see
+ * http://php.net/manual/en/features.file-upload.php#42280
+ */
+function _fix_gpc_magic_files(&$item, $key) {
+  if ($key != 'tmp_name') {
+    if (is_array($item)) {
+      array_walk($item, '_fix_gpc_magic_files');
+    }
+    else {
+      $item = stripslashes($item);
+    }
+  }
+}
+
+/**
+ * Correct double-escaping problems caused by "magic quotes" in some PHP
+ * installations.
+ */
+function fix_gpc_magic() {
+  static $fixed = FALSE;
+  if (!$fixed && ini_get('magic_quotes_gpc')) {
+    array_walk($_GET, '_fix_gpc_magic');
+    array_walk($_POST, '_fix_gpc_magic');
+    array_walk($_COOKIE, '_fix_gpc_magic');
+    array_walk($_REQUEST, '_fix_gpc_magic');
+    array_walk($_FILES, '_fix_gpc_magic_files');
+    $fixed = TRUE;
+  }
+}
+
+/**
+ * Initialize the localization system.
+ */
+function locale_initialize() {
+  global $user;
+
+  if (function_exists('i18n_get_lang')) {
+    return i18n_get_lang();
+  }
+
+  if (function_exists('locale')) {
+    $languages = locale_supported_languages();
+    $languages = $languages['name'];
+  }
+  else {
+    // Ensure the locale/language is correctly returned, even without locale.module.
+    // Useful for e.g. XML/HTML 'lang' attributes.
+    $languages = array('en' => 'English');
+  }
+  if ($user->uid && isset($languages[$user->language])) {
+    return $user->language;
+  }
+  else {
+    return key($languages);
+  }
+}
+
+/**
+ * Translate strings to the current locale.
+ *
+ * All human-readable text that will be displayed somewhere within a page should be
+ * run through the t() function.
+ *
+ * Examples:
+ * @code
+ *   if (!$info || !$info['extension']) {
+ *     form_set_error('picture_upload', t('The uploaded file was not an image.'));
+ *   }
+ *
+ *   $form['submit'] = array(
+ *     '#type' => 'submit',
+ *     '#value' => t('Log in'),
+ *   );
+ * @endcode
+ *
+ * Any text within t() can be extracted by translators and changed into
+ * the equivalent text in their native language.
+ *
+ * Special variables called "placeholders" are used to signal dynamic
+ * information in a string which should not be translated. Placeholders
+ * can also be used for text that may change from time to time
+ * (such as link paths) to be changed without requiring updates to translations.
+ *
+ * For example:
+ * @code
+ *   $output = t('There are currently %members and %visitors online.', array(
+ *     '%members' => format_plural($total_users, '1 user', '@count users'),
+ *     '%visitors' => format_plural($guests->count, '1 guest', '@count guests')));
+ * @endcode
+ *
+ * There are three styles of placeholders:
+ * - !variable, which indicates that the text should be inserted as-is. This is
+ *   useful for inserting variables into things like e-mail.
+ *   @code
+ *     $message[] = t("If you don't want to receive such e-mails, you can change your settings at !url.", array('!url' => url("user/$account->uid", NULL, NULL, TRUE)));
+ *   @endcode
+ *
+ * - @variable, which indicates that the text should be run through check_plain,
+ *   to strip out HTML characters. Use this for any output that's displayed within
+ *   a Drupal page.
+ *   @code
+ *     drupal_set_title($title = t("@name's blog", array('@name' => $account->name)));
+ *   @endcode
+ *
+ * - %variable, which indicates that the string should be highlighted with
+ *   theme_placeholder() which shows up by default as <em>emphasized</em>.
+ *   @code
+ *     watchdog('mail', t('%name-from sent %name-to an e-mail.', array('%name-from' => $user->name, '%name-to' => $account->name)));
+ *   @endcode
+ *
+ * When using t(), try to put entire sentences and strings in one t() call.
+ * This makes it easier for translators, as it provides context as to what
+ * each word refers to. HTML markup within translation strings is allowed,
+ * but should be avoided if possible. The exception is embedded links; link
+ * titles add additional context for translators so should be kept in the main
+ * string.
+ *
+ * Here is an example of an incorrect use if t():
+ * @code
+ *   $output .= t('<p>Go to the @contact-page.</p>', array('@contact-page' => l(t('contact page'), 'contact')));
+ * @endcode
+ *
+ * Here is an example of t() used correctly:
+ * @code
+ *   $output .= '<p>'. t('Go to the <a href="@contact-page">contact page</a>.', array('@contact-page' => url('contact'))) .'</p>';
+ * @endcode
+ *
+ * Also avoid escaping quotation marks wherever possible.
+ *
+ * Incorrect:
+ * @code
+ *   $output .= t('Don\'t click me.');
+ * @endcode
+ *
+ * Correct:
+ * @code
+ *   $output .= t("Don't click me.");
+ * @endcode
+ *
+ * @param $string
+ *   A string containing the English string to translate.
+ * @param $args
+ *   An associative array of replacements to make after translation. Incidences
+ *   of any key in this array are replaced with the corresponding value.
+ *   Based on the first character of the key, the value is escaped and/or themed:
+ *    - !variable: inserted as is
+ *    - @variable: escape plain text to HTML (check_plain)
+ *    - %variable: escape text and theme as a placeholder for user-submitted
+ *      content (check_plain + theme_placeholder)
+ * @return
+ *   The translated string.
+ */
+function t($string, $args = 0) {
+  global $locale;
+  if (function_exists('locale') && $locale != 'en') {
+    $string = locale($string);
+  }
+  if (!$args) {
+    return $string;
+  }
+  else {
+    // Transform arguments before inserting them
+    foreach ($args as $key => $value) {
+      switch ($key[0]) {
+        // Escaped only
+        case '@':
+          $args[$key] = check_plain($value);
+        break;
+        // Escaped and placeholder
+        case '%':
+        default:
+          $args[$key] = theme('placeholder', $value);
+          break;
+        // Pass-through
+        case '!':
+      }
+    }
+    return strtr($string, $args);
+  }
+}
+
+/**
+ * @defgroup validation Input validation
+ * @{
+ * Functions to validate user input.
+ */
+
+/**
+ * Verify the syntax of the given e-mail address.
+ *
+ * Empty e-mail addresses are allowed. See RFC 2822 for details.
+ *
+ * @param $mail
+ *   A string containing an e-mail address.
+ * @return
+ *   TRUE if the address is in a valid format.
+ */
+function valid_email_address($mail) {
+  $user = '[a-zA-Z0-9_\-\.\+\^!#\$%&*+\/\=\?\`\|\{\}~\']+';
+  $domain = '(?:(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.?)+';
+  $ipv4 = '[0-9]{1,3}(\.[0-9]{1,3}){3}';
+  $ipv6 = '[0-9a-fA-F]{1,4}(\:[0-9a-fA-F]{1,4}){7}';
+
+  return preg_match("/^$user@($domain|(\[($ipv4|$ipv6)\]))$/", $mail);
+}
+
+/**
+ * Verify the syntax of the given URL.
+ *
+ * This function should only be used on actual URLs. It should not be used for
+ * Drupal menu paths, which can contain arbitrary characters.
+ *
+ * @param $url
+ *   The URL to verify.
+ * @param $absolute
+ *   Whether the URL is absolute (beginning with a scheme such as "http:").
+ * @return
+ *   TRUE if the URL is in a valid format.
+ */
+function valid_url($url, $absolute = FALSE) {
+  $allowed_characters = '[a-z0-9\/:_\-_\.\?\$,;~=#&%\+]';
+  if ($absolute) {
+    return preg_match("/^(http|https|ftp):\/\/". $allowed_characters ."+$/i", $url);
+  }
+  else {
+    return preg_match("/^". $allowed_characters ."+$/i", $url);
+  }
+}
+
+/**
+ * Register an event for the current visitor (hostname/IP) to the flood control mechanism.
+ *
+ * @param $name
+ *   The name of the event.
+ */
+function flood_register_event($name) {
+  db_query("INSERT INTO {flood} (event, hostname, timestamp) VALUES ('%s', '%s', %d)", $name, $_SERVER['REMOTE_ADDR'], 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_num_rows(db_query("SELECT event FROM {flood} WHERE event = '%s' AND hostname = '%s' AND timestamp > %d", $name, $_SERVER['REMOTE_ADDR'], time() - 3600));
+  return ($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, $language = 'en', $args = array()) {
+  // arbitrary elements may be added using the $args associative array
+
+  $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";
+  $output .= ' <language>'. check_plain($language) ."</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) {
+  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.
+ *
+ * @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").
+ * @param $plural
+ *   The string for the plural case. Please make sure it is clear this is plural,
+ *   to ease translation. Use @count in place of the item count, as in "@count
+ *   new comments".
+ * @return
+ *   A translated string.
+ */
+function format_plural($count, $singular, $plural) {
+  if ($count == 1) return t($singular, array("@count" => $count));
+
+  // get the plural index through the gettext formula
+  $index = (function_exists('locale_get_plural')) ? locale_get_plural($count) : -1;
+  if ($index < 0) { // backward compatibility
+    return t($plural, array("@count" => $count));
+  }
+  else {
+    switch ($index) {
+      case "0":
+        return t($singular, array("@count" => $count));
+      case "1":
+        return t($plural, array("@count" => $count));
+      default:
+        return t(strtr($plural, array("@count" => '@count['. $index .']')), array('@count['. $index .']' => $count));
+    }
+  }
+}
+
+/**
+ * Parse a given byte count.
+ *
+ * @param $size
+ *   The size expressed as a number of bytes with optional SI size and unit
+ *   suffix (e.g. 2, 3K, 5MB, 10G).
+ * @return
+ *   An integer representation of the size.
+ */
+function parse_size($size) {
+  $suffixes = array(
+    '' => 1,
+    'k' => 1024,
+    'm' => 1048576, // 1024 * 1024
+    'g' => 1073741824, // 1024 * 1024 * 1024
+  );
+  if (preg_match('/([0-9]+)\s*(k|m|g)?(b?(ytes?)?)/i', $size, $match)) {
+    return $match[1] * $suffixes[drupal_strtolower($match[2])];
+  }
+}
+
+/**
+ * Generate a string representation for the given byte count.
+ *
+ * @param $size
+ *   The size in bytes.
+ * @return
+ *   A translated string representation of the size.
+ */
+function format_size($size) {
+  if ($size < 1024) {
+    return format_plural($size, '1 byte', '@count bytes');
+  }
+  else {
+    $size = round($size / 1024, 2);
+    $suffix = t('KB');
+    if ($size >= 1024) {
+      $size = round($size / 1024, 2);
+      $suffix = t('MB');
+    }
+    return t('@size @suffix', array('@size' => $size, '@suffix' => $suffix));
+  }
+}
+
+/**
+ * Format a time interval with the requested granularity.
+ *
+ * @param $timestamp
+ *   The length of the interval in seconds.
+ * @param $granularity
+ *   How many different units to display in the string.
+ * @return
+ *   A translated string representation of the interval.
+ */
+function format_interval($timestamp, $granularity = 2) {
+  $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]);
+      $timestamp %= $value;
+      $granularity--;
+    }
+
+    if ($granularity == 0) {
+      break;
+    }
+  }
+  return $output ? $output : t('0 sec');
+}
+
+/**
+ * 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 $timezone
+ *   Time zone offset in seconds; if omitted, the user's time zone is used.
+ * @return
+ *   A translated date string in the requested format.
+ */
+function format_date($timestamp, $type = 'medium', $format = '', $timezone = NULL) {
+  if (!isset($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('AaDFlM', $c) !== FALSE) {
+      $date .= t(gmdate($c, $timestamp));
+    }
+    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', $timezone);
+    }
+    else if ($c == 'O') {
+      $date .= sprintf('%s%02d%02d', ($timezone < 0 ? '-' : '+'), abs($timezone / 3600), abs($timezone % 3600) / 60);
+    }
+    else if ($c == 'Z') {
+      $date .= $timezone;
+    }
+    else if ($c == '\\') {
+      $date .= $format[++$i];
+    }
+    else {
+      $date .= $c;
+    }
+  }
+
+  return $date;
+}
+
+/**
+ * @} End of "defgroup format".
+ */
+
+/**
+ * Generate a URL from a Drupal menu path. Will also pass-through existing URLs.
+ *
+ * @param $path
+ *   The Drupal path being linked to, such as "admin/content/node", or an existing URL
+ *   like "http://drupal.org/".
+ * @param $query
+ *   A query string to append to the link or URL.
+ * @param $fragment
+ *   A fragment identifier (named anchor) to append to the link. If an existing
+ *   URL with a fragment identifier is used, it will be replaced. Note, do not
+ *   include the '#'.
+ * @param $absolute
+ *   Whether to force the output to be an absolute link (beginning with http:).
+ *   Useful for links that will be displayed outside the site, such as in an
+ *   RSS feed.
+ * @return
+ *   a string containing a URL to the given path.
+ *
+ * When creating links in modules, consider whether l() could be a better
+ * alternative than url().
+ */
+function url($path = NULL, $query = NULL, $fragment = NULL, $absolute = FALSE) {
+  if (isset($fragment)) {
+    $fragment = '#'. $fragment;
+  }
+
+  // Return an external link if $path contains an allowed absolute URL.
+  // Only call the slow filter_xss_bad_protocol if $path contains a ':' before any / ? or #.
+  $colonpos = strpos($path, ':');
+  if ($colonpos !== FALSE && !preg_match('![/?#]!', substr($path, 0, $colonpos)) && filter_xss_bad_protocol($path, FALSE) == check_plain($path)) {
+    // Split off the fragment
+    if (strpos($path, '#') !== FALSE) {
+      list($path, $old_fragment) = explode('#', $path, 2);
+      if (isset($old_fragment) && !isset($fragment)) {
+        $fragment = '#'. $old_fragment;
+      }
+    }
+    // Append the query
+    if (isset($query)) {
+      $path .= (strpos($path, '?') !== FALSE ? '&' : '?') . $query;
+    }
+    // Reassemble
+    return $path . $fragment;
+  }
+
+  global $base_url;
+  static $script;
+  static $clean_url;
+
+  if (empty($script)) {
+    // On some web servers, such as IIS, we can't omit "index.php". So, we
+    // generate "index.php?q=foo" instead of "?q=foo" on anything that is not
+    // Apache.
+    $script = (strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') === FALSE) ? 'index.php' : '';
+  }
+
+  // Cache the clean_url variable to improve performance.
+  if (!isset($clean_url)) {
+    $clean_url = (bool)variable_get('clean_url', '0');
+  }
+
+  $base = ($absolute ? $base_url . '/' : base_path());
+
+  // The special path '<front>' links to the default front page.
+  if (!empty($path) && $path != '<front>') {
+    $path = drupal_get_path_alias($path);
+    $path = drupal_urlencode($path);
+    if (!$clean_url) {
+      if (isset($query)) {
+        return $base . $script .'?q='. $path .'&'. $query . $fragment;
+      }
+      else {
+        return $base . $script .'?q='. $path . $fragment;
+      }
+    }
+    else {
+      if (isset($query)) {
+        return $base . $path .'?'. $query . $fragment;
+      }
+      else {
+        return $base . $path . $fragment;
+      }
+    }
+  }
+  else {
+    if (isset($query)) {
+      return $base . $script .'?'. $query . $fragment;
+    }
+    else {
+      return $base . $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.
+ * @param $attributes
+ *   An associative array of HTML attributes to apply to the anchor tag.
+ * @param $query
+ *   A query string to append to the link.
+ * @param $fragment
+ *   A fragment identifier (named anchor) to append to the link.
+ * @param $absolute
+ *   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.
+ * @param $html
+ *   Whether the title is HTML, or just plain-text. For example for making an
+ *   image a link, this must be set to TRUE, or else you will see the encoded
+ *   HTML.
+ * @return
+ *   an HTML string containing a link to the given path.
+ */
+function l($text, $path, $attributes = array(), $query = NULL, $fragment = NULL, $absolute = FALSE, $html = FALSE) {
+  if ($path == $_GET['q']) {
+    if (isset($attributes['class'])) {
+      $attributes['class'] .= ' active';
+    }
+    else {
+      $attributes['class'] = 'active';
+    }
+  }
+  return '<a href="'. check_url(url($path, $query, $fragment, $absolute)) .'"'. drupal_attributes($attributes) .'>'. ($html ? $text : check_plain($text)) .'</a>';
+}
+
+/**
+ * Perform end-of-request tasks.
+ *
+ * This function sets the page cache if appropriate, and allows modules to
+ * react to the closing of the page by calling hook_exit().
+ */
+function drupal_page_footer() {
+  if (variable_get('cache', 0)) {
+    page_set_cache();
+  }
+
+  module_invoke_all('exit');
+}
+
+/**
+ * Form an associative array from a linear array.
+ *
+ * This function walks through the provided array and constructs an associative
+ * array out of it. The keys of the resulting array will be the values of the
+ * input array. The values will be the same as the keys unless a function is
+ * specified, in which case the output of the function is used for the values
+ * instead.
+ *
+ * @param $array
+ *   A linear array.
+ * @param $function
+ *   The name of a function to apply to all values before output.
+ * @result
+ *   An associative array.
+ */
+function drupal_map_assoc($array, $function = NULL) {
+  if (!isset($function)) {
+    $result = array();
+    foreach ($array as $value) {
+      $result[$value] = $value;
+    }
+    return $result;
+  }
+  elseif (function_exists($function)) {
+    $result = array();
+    foreach ($array as $value) {
+      $result[$value] = $function($value);
+    }
+    return $result;
+  }
+}
+
+/**
+ * Evaluate a string of PHP code.
+ *
+ * This is a wrapper around PHP's eval(). It uses output buffering to capture both
+ * returned and printed text. Unlike eval(), we require code to be surrounded by
+ * <?php ?> tags; in other words, we evaluate the code as if it were a stand-alone
+ * PHP file.
+ *
+ * Using this wrapper also ensures that the PHP code which is evaluated can not
+ * overwrite any variables in the calling code, unlike a regular eval() call.
+ *
+ * @param $code
+ *   The code to evaluate.
+ * @return
+ *   A string containing the printed output of the code, followed by the returned
+ *   output of the code.
+ */
+function drupal_eval($code) {
+  ob_start();
+  print eval('?>'. $code);
+  $output = ob_get_contents();
+  ob_end_clean();
+  return $output;
+}
+
+/**
+ * Returns the path to a system item (module, theme, etc.).
+ *
+ * @param $type
+ *   The type of the item (i.e. theme, theme_engine, module).
+ * @param $name
+ *   The name of the item for which the path is requested.
+ *
+ * @return
+ *   The path to the requested item.
+ */
+function drupal_get_path($type, $name) {
+  return dirname(drupal_get_filename($type, $name));
+}
+
+/**
+ * Returns the base URL path of the Drupal installation.
+ * At the very least, this will always default to /.
+ */
+function base_path() {
+  return $GLOBALS['base_path'];
+}
+
+/**
+ * Provide a substitute clone() function for PHP4.
+ */
+function drupal_clone($object) {
+  return version_compare(phpversion(), '5.0') < 0 ? $object : clone($object);
+}
+
+/**
+ * Add a <link> tag to the page's HEAD.
+ */
+function drupal_add_link($attributes) {
+  drupal_set_html_head('<link'. drupal_attributes($attributes) ." />\n");
+}
+
+/**
+ * Adds a CSS file to the stylesheet queue.
+ *
+ * @param $path
+ *   (optional) The path to the CSS file relative to the base_path(), e.g.,
+ *   /modules/devel/devel.css.
+ * @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 $css = array();
+
+  // Create an array of CSS files for each media type first, since each type needs to be served
+  // to the browser differently.
+  if (isset($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;
+  }
+
+  return $css;
+}
+
+/**
+ * Returns a themed representation of all stylesheets that should be attached to the page.
+ * It loads the CSS in order, with 'core' CSS first, then 'module' CSS, then 'theme' CSS files.
+ * This ensures proper cascading of styles for easy overriding in modules and themes.
+ *
+ * @param $css
+ *   (optional) An array of CSS files. If no array is provided, the default stylesheets array is used instead.
+ * @return
+ *   A string of XHTML CSS tags.
+ */
+function drupal_get_css($css = NULL) {
+  $output = '';
+  if (!isset($css)) {
+    $css = drupal_add_css();
+  }
+
+  $preprocess_css = variable_get('preprocess_css', FALSE);
+  $directory = file_directory_path();
+  $is_writable = is_dir($directory) && is_writable($directory) && (variable_get('file_downloads', FILE_DOWNLOADS_PUBLIC) == FILE_DOWNLOADS_PUBLIC);
+
+  foreach ($css as $media => $types) {
+    // If CSS preprocessing is off, we still need to output the styles.
+    // Additionally, go through any remaining styles if CSS preprocessing is on and output the non-cached ones.
+    foreach ($types as $type => $files) {
+      foreach ($types[$type] as $file => $preprocess) {
+        if (!$preprocess || !($is_writable && $preprocess_css)) {
+          // If a CSS file is not to be preprocessed and it's a module CSS file, it needs to *always* appear at the *top*,
+          // regardless of whether preprocessing is on or off.
+          if (!$preprocess && $type == 'module') {
+            $no_module_preprocess .= '<style type="text/css" media="'. $media .'">@import "'. base_path() . $file .'";</style>' ."\n";
+          }
+          // If a CSS file is not to be preprocessed and it's a theme CSS file, it needs to *always* appear at the *bottom*,
+          // regardless of whether preprocessing is on or off.
+          else if (!$preprocess && $type == 'theme') {
+            $no_theme_preprocess .= '<style type="text/css" media="'. $media .'">@import "'. base_path() . $file .'";</style>' ."\n";
+          }
+          else {
+            $output .= '<style type="text/css" media="'. $media .'">@import "'. base_path() . $file .'";</style>' ."\n";
+          }
+        }
+      }
+    }
+
+    if ($is_writable && $preprocess_css) {
+      $filename = md5(serialize($types)) .'.css';
+      $preprocess_file = drupal_build_css_cache($types, $filename);
+      $output .= '<style type="text/css" media="'. $media .'">@import "'. base_path() . $preprocess_file .'";</style>'. "\n";
+    }
+  }
+
+  return $no_module_preprocess . $output . $no_theme_preprocess;
+}
+
+/**
+ * Aggregate and optimize CSS files, putting them in the files directory.
+ *
+ * @param $types
+ *   An array of types of CSS files (e.g., screen, print) to aggregate and compress into one file.
+ * @param $filename
+ *   The name of the aggregate CSS file.
+ * @return
+ *   The name of the CSS file.
+ */
+function drupal_build_css_cache($types, $filename) {
+  $data = '';
+
+  // Create the css/ within the files folder.
+  $csspath = file_create_path('css');
+  file_check_directory($csspath, FILE_CREATE_DIRECTORY);
+
+  if (!file_exists($csspath .'/'. $filename)) {
+    // Build aggregate CSS file.
+    foreach ($types as $type) {
+      foreach ($type as $file => $cache) {
+        if ($cache) {
+          $contents = file_get_contents($file);
+          // Return the path to where this CSS file originated from, stripping off the name of the file at the end of the path.
+          $path = base_path() . substr($file, 0, strrpos($file, '/')) .'/';
+          // Wraps all @import arguments in url().
+          $contents = preg_replace('/@import\s+(?!url)[\'"]?(\S*)\b[\'"]?/i', '@import url("\1")', $contents);
+          // Fix all paths within this CSS file, ignoring absolute paths.
+          $data .= preg_replace('/url\(([\'"]?)(?![a-z]+:)/i', 'url(\1'. $path . '\2', $contents);
+        }
+      }
+    }
+
+    // @import rules must proceed any other style, so we move those to the top.
+    $regexp = '/@import[^;]+;/i';
+    preg_match_all($regexp, $data, $matches);
+    $data = preg_replace($regexp, '', $data);
+    $data = implode('', $matches[0]) . $data;
+
+    // Perform some safe CSS optimizations.
+    $data = preg_replace('<
+      \s*([@{}:;,]|\)\s|\s\()\s* |  # Remove whitespace around separators, but keep space around parentheses.
+      /\*([^*\\\\]|\*(?!/))+\*/ |   # Remove comments that are not CSS hacks.
+      [\n\r]                        # Remove line breaks.
+      >x', '\1', $data);
+
+    // Create the CSS file.
+    file_save_data($data, $csspath .'/'. $filename, FILE_EXISTS_REPLACE);
+  }
+  return $csspath .'/'. $filename;
+}
+
+/**
+ * Delete all cached CSS files.
+ */
+function drupal_clear_css_cache() {
+  file_scan_directory(file_create_path('css'), '.*', array('.', '..', 'CVS'), 'file_delete', TRUE);
+}
+
+/**
+ * Add a JavaScript file, setting or inline code to the page.
+ *
+ * The behavior of this function depends on the parameters it is called with.
+ * Generally, it handles the addition of JavaScript to the page, either as
+ * reference to an existing file or as inline code. The following actions can be
+ * performed using this function:
+ *
+ * - Add a file ('core', 'module' and 'theme'):
+ *   Adds a reference to a JavaScript file to the page. JavaScript files
+ *   are placed in a certain order, from 'core' first, to 'module' and finally
+ *   'theme' so that files, that are added later, can override previously added
+ *   files with ease.
+ *
+ * - Add inline JavaScript code ('inline'):
+ *   Executes a piece of JavaScript code on the current page by placing the code
+ *   directly in the page. This can, for example, be useful to tell the user that
+ *   a new message arrived, by opening a pop up, alert box etc.
+ *
+ * - Add settings ('setting'):
+ *   Adds a setting to Drupal's global storage of JavaScript settings. Per-page
+ *   settings are required by some modules to function properly. The settings
+ *   will be accessible at Drupal.settings.
+ *
+ * @param $data
+ *   (optional) If given, the value depends on the $type parameter:
+ *   - 'core', 'module' or 'theme': Path to the file relative to base_path().
+ *   - 'inline': The JavaScript code that should be placed in the given scope.
+ *   - 'setting': An array with configuration options as associative array. The
+ *       array is directly placed in Drupal.settings. You might want to wrap your
+ *       actual configuration settings in another variable to prevent the pollution
+ *       of the Drupal.settings namespace.
+ * @param $type
+ *   (optional) The type of JavaScript that should be added to the page. Allowed
+ *   values are 'core', 'module', 'theme', 'inline' and 'setting'. You
+ *   can, however, specify any value. It is treated as a reference to a JavaScript
+ *   file. Defaults to 'module'.
+ * @param $scope
+ *   (optional) The location in which you want to place the script. Possible
+ *   values are 'header' and 'footer' by default. If your theme implements
+ *   different locations, however, you can also use these.
+ * @param $defer
+ *   (optional) If set to TRUE, the defer attribute is set on the <script> tag.
+ *   Defaults to FALSE. This parameter is not used with $type == 'setting'.
+ * @param $cache
+ *   (optional) If set to FALSE, the JavaScript file is loaded anew on every page
+ *   call, that means, it is not cached. Defaults to TRUE. Used only when $type
+ *   references a JavaScript file.
+ * @return
+ *   If the first parameter is NULL, the JavaScript array that has been built so
+ *   far for $scope is returned.
+ */
+function drupal_add_js($data = NULL, $type = 'module', $scope = 'header', $defer = FALSE, $cache = TRUE) {
+  if (!is_null($data)) {
+    _drupal_add_js('misc/jquery.js', 'core', 'header', FALSE, $cache);
+    _drupal_add_js('misc/drupal.js', 'core', 'header', FALSE, $cache);
+  }
+  return _drupal_add_js($data, $type, $scope, $defer, $cache);
+}
+
+/**
+ * Helper function for drupal_add_js().
+ */
+function _drupal_add_js($data, $type, $scope, $defer, $cache) {
+  static $javascript = array();
+
+  if (!isset($javascript[$scope])) {
+    $javascript[$scope] = array('core' => array(), 'module' => array(), 'theme' => array(), 'setting' => array(), 'inline' => array());
+  }
+
+  if (!isset($javascript[$scope][$type])) {
+    $javascript[$scope][$type] = array();
+  }
+
+  if (!is_null($data)) {
+    switch ($type) {
+      case 'setting':
+        $javascript[$scope][$type][] = $data;
+        break;
+      case 'inline':
+        $javascript[$scope][$type][] = array('code' => $data, 'defer' => $defer);
+        break;
+      default:
+        $javascript[$scope][$type][$data] = array('cache' => $cache, 'defer' => $defer);
+    }
+  }
+
+  return $javascript[$scope];
+}
+
+/**
+ * Returns a themed presentation of all JavaScript code for the current page.
+ * References to JavaScript files are placed in a certain order: first, all
+ * 'core' files, then all 'module' and finally all 'theme' JavaScript files
+ * are added to the page. Then, all settings are output, followed by 'inline'
+ * JavaScript code.
+ *
+ * @parameter $scope
+ *   (optional) The scope for which the JavaScript rules should be returned.
+ *   Defaults to 'header'.
+ * @parameter $javascript
+ *   (optional) An array with all JavaScript code. Defaults to the default
+ *   JavaScript array for the given scope.
+ * @return
+ *   All JavaScript code segments and includes for the scope as HTML tags.
+ */
+function drupal_get_js($scope = 'header', $javascript = NULL) {
+  $output = '';
+  if (is_null($javascript)) {
+    $javascript = drupal_add_js(NULL, NULL, $scope);
+  }
+
+  foreach ($javascript as $type => $data) {
+    if (!$data) continue;
+
+    switch ($type) {
+      case 'setting':
+        $output .= '<script type="text/javascript">Drupal.extend({ settings: '. drupal_to_js(call_user_func_array('array_merge_recursive', $data)) ." });</script>\n";
+        break;
+      case 'inline':
+        foreach ($data as $info) {
+          $output .= '<script type="text/javascript"'. ($info['defer'] ? ' defer="defer"' : '') .'>'. $info['code'] ."</script>\n";
+        }
+        break;
+      default:
+        foreach ($data as $path => $info) {
+          $output .= '<script type="text/javascript"'. ($info['defer'] ? ' defer="defer"' : '') .' src="'. check_url(base_path() . $path) . ($info['cache'] ? '' : '?'. time()) ."\"></script>\n";
+        }
+    }
+  }
+
+  return $output;
+}
+
+/**
+ * Converts a PHP variable into its Javascript equivalent.
+ *
+ * We use HTML-safe strings, i.e. with <, > and & escaped.
+ */
+function drupal_to_js($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':
+      if (array_keys($var) === range(0, sizeof($var) - 1)) {
+        $output = array();
+        foreach ($var as $v) {
+          $output[] = drupal_to_js($v);
+        }
+        return '[ '. implode(', ', $output) .' ]';
+      }
+      // Fall through
+    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';
+  }
+}
+
+/**
+ * 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's unescapes %-encoded ampersands and hashes 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.
+ *
+ * @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'),
+                       urlencode($text));
+  }
+  else {
+    return str_replace('%2F', '/', urlencode($text));
+  }
+}
+
+/**
+ * Ensure the private key variable used to generate tokens is set.
+ *
+ * @return
+ *   The private key
+ */
+function drupal_get_private_key() {
+  if (!($key = variable_get('drupal_private_key', 0))) {
+    $key = md5(uniqid(mt_rand(), true)) . md5(uniqid(mt_rand(), true));
+    variable_set('drupal_private_key', $key);
+  }
+  return $key;
+}
+
+/**
+ * Generate a token based on $value, the current user session and private key.
+ *
+ * @param $value
+ *   An additional value to base the token on
+ */
+function drupal_get_token($value = '') {
+  $private_key = drupal_get_private_key();
+  return md5(session_id() . $value . $private_key);
+}
+
+/**
+ * Validate a token based on $value, the current user session and private key.
+ *
+ * @param $token
+ *   The token to be validated.
+ * @param $value
+ *   An additional value to base the token on.
+ * @param $skip_anonymous
+ *   Set to true to skip token validation for anonymous users.
+ * @return
+ *   True for a valid token, false for an invalid token. When $skip_anonymous is true, the return value will always be true for anonymous users.
+ */
+function drupal_valid_token($token, $value = '', $skip_anonymous = FALSE) {
+  global $user;
+  return (($skip_anonymous && $user->uid == 0) || ($token == md5(session_id() . $value . variable_get('drupal_private_key', ''))));
+}
+
+/**
+ * Performs one or more XML-RPC request(s).
+ *
+ * @param $url
+ *   An absolute URL of the XML-RPC endpoint.
+ *     Example:
+ *     http://www.example.com/xmlrpc.php
+ * @param ...
+ *   For one request:
+ *     The method name followed by a variable number of arguments to the method.
+ *   For multiple requests (system.multicall):
+ *     An array of call arrays. Each call array follows the pattern of the single
+ *     request: method name followed by the arguments to the method.
+ * @return
+ *   For one request:
+ *     Either the return value of the method on success, or FALSE.
+ *     If FALSE is returned, see xmlrpc_errno() and xmlrpc_error_msg().
+ *   For multiple requests:
+ *     An array of results. Each result will either be the result
+ *     returned by the method called, or an xmlrpc_error object if the call
+ *     failed. See xmlrpc_error().
+ */
+function xmlrpc($url) {
+  require_once './includes/xmlrpc.inc';
+  $args = func_get_args();
+  return call_user_func_array('_xmlrpc', $args);
+}
+
+function _drupal_bootstrap_full() {
+  static $called;
+  global $locale;
+
+  if ($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';
+  // Set the Drupal custom error handler.
+  set_error_handler('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();
+  // Initialize the localization system.  Depends on i18n.module being loaded already.
+  $locale = locale_initialize();
+  // Let all modules take action before menu system handles the reqest
+  module_invoke_all('init');
+
+}
+
+/**
+ * Store the current page in the cache.
+ *
+ * We try to store a gzipped version of the cache. This requires the
+ * PHP zlib extension (http://php.net/manual/en/ref.zlib.php).
+ * Presence of the extension is checked by testing for the function
+ * gzencode. There are two compression algorithms: gzip and deflate.
+ * The majority of all modern browsers support gzip or both of them.
+ * We thus only deal with the gzip variant and unzip the cache in case
+ * the browser does not accept gzip encoding.
+ *
+ * @see drupal_page_header
+ */
+function page_set_cache() {
+  global $user, $base_root;
+
+  if (!$user->uid && $_SERVER['REQUEST_METHOD'] == 'GET' && count(drupal_get_messages(NULL, FALSE)) == 0) {
+    // This will fail in some cases, see page_get_cache() for the explanation.
+    if ($data = ob_get_contents()) {
+      $cache = TRUE;
+      if (function_exists('gzencode')) {
+        // We do not store the data in case the zlib mode is deflate.
+        // This should be rarely happening.
+        if (zlib_get_coding_type() == 'deflate') {
+          $cache = FALSE;
+        }
+        else if (zlib_get_coding_type() == FALSE) {
+          $data = gzencode($data, 9, FORCE_GZIP);
+        }
+        // The remaining case is 'gzip' which means the data is
+        // already compressed and nothing left to do but to store it.
+      }
+      ob_end_flush();
+      if ($cache && $data) {
+        cache_set($base_root . request_uri(), 'cache_page', $data, CACHE_TEMPORARY, drupal_get_headers());
+      }
+    }
+  }
+}
+
+/**
+ * Send an e-mail message, using Drupal variables and default settings.
+ * More information in the <a href="http://php.net/manual/en/function.mail.php">
+ * PHP function reference for mail()</a>
+ * @param $mailkey
+ *   A key to identify the mail sent, for altering.
+ * @param $to
+ *   The mail address or addresses where the message will be send to. The
+ *   formatting of this string must comply with RFC 2822. Some examples are:
+ *    user@example.com
+ *    user@example.com, anotheruser@example.com
+ *    User <user@example.com>
+ *    User <user@example.com>, Another User <anotheruser@example.com>
+ * @param $subject
+ *   Subject of the e-mail to be sent. This must not contain any newline
+ *   characters, or the mail may not be sent properly.
+ * @param $body
+ *   Message to be sent. Drupal will format the correct line endings for you.
+ * @param $from
+ *   Sets From, Reply-To, Return-Path and Error-To to this value, if given.
+ * @param $headers
+ *   Associative array containing the headers to add. This is typically
+ *   used to add extra headers (From, Cc, and Bcc).
+ *   <em>When sending mail, the mail must contain a From header.</em>
+ * @return Returns TRUE if the mail was successfully accepted for delivery,
+ *   FALSE otherwise.
+ */
+function drupal_mail($mailkey, $to, $subject, $body, $from = NULL, $headers = array()) {
+  $defaults = array(
+    'MIME-Version' => '1.0',
+    'Content-Type' => 'text/plain; charset=UTF-8; format=flowed',
+    'Content-Transfer-Encoding' => '8Bit',
+    'X-Mailer' => 'Drupal'
+  );
+  if (isset($from)) {
+    $defaults['From'] = $defaults['Reply-To'] = $defaults['Return-Path'] = $defaults['Errors-To'] = $from;
+  }
+  $headers = array_merge($defaults, $headers);
+  // Custom hook traversal to allow pass by reference
+  foreach (module_implements('mail_alter') AS $module) {
+    $function = $module .'_mail_alter';
+    $function($mailkey, $to, $subject, $body, $from, $headers);
+  }
+  // Allow for custom mail backend
+  if (variable_get('smtp_library', '') && file_exists(variable_get('smtp_library', ''))) {
+    include_once './' . variable_get('smtp_library', '');
+    return drupal_mail_wrapper($mailkey, $to, $subject, $body, $from, $headers);
+  }
+  else {
+    /*
+    ** Note: if you are having problems with sending mail, or mails look wrong
+    ** when they are received you may have to modify the str_replace to suit
+    ** your systems.
+    **  - \r\n will work under dos and windows.
+    **  - \n will work for linux, unix and BSDs.
+    **  - \r will work for macs.
+    **
+    ** According to RFC 2646, it's quite rude to not wrap your e-mails:
+    **
+    ** "The Text/Plain media type is the lowest common denominator of
+    ** Internet e-mail, with lines of no more than 997 characters (by
+    ** convention usually no more than 80), and where the CRLF sequence
+    ** represents a line break [MIME-IMT]."
+    **
+    ** CRLF === \r\n
+    **
+    ** http://www.rfc-editor.org/rfc/rfc2646.txt
+    **
+    */
+    $mimeheaders = array();
+    foreach ($headers as $name => $value) {
+      $mimeheaders[] = $name .': '. mime_header_encode($value);
+    }
+    return mail(
+      $to,
+      mime_header_encode($subject),
+      str_replace("\r", '', $body),
+      join("\n", $mimeheaders)
+    );
+  }
+}
+
+/**
+ * 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', t('Cron has been running for more than an hour and is most likely stuck.'), WATCHDOG_ERROR);
+
+      // Release cron semaphore
+      variable_del('cron_semaphore');
+    }
+    else {
+      // Cron is still running normally.
+      watchdog('cron', t('Attempting to re-run cron while it is already running.'), 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', t('Cron run completed.'), 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', t('Cron run exceeded the time limit and was aborted.'), WATCHDOG_WARNING);
+
+    // Release cron semaphore
+    variable_del('cron_semaphore');
+  }
+}
+
+/**
+ * Returns an array of files objects of the given type from the site-wide
+ * directory (i.e. modules/), the all-sites directory (i.e.
+ * sites/all/modules/), the profiles directory, and site-specific directory
+ * (i.e. sites/somesite/modules/). The returned array will be keyed using the
+ * key specified (name, basename, filename). Using name or basename will cause
+ * site-specific files to be prioritized over similar files in the default
+ * directories. That is, if a file with the same name appears in both the
+ * site-wide directory and site-specific directory, only the site-specific
+ * version will be included.
+ *
+ * @param $mask
+ *   The regular expression of the files to find.
+ * @param $directory
+ *   The subdirectory name in which the files are found. For example,
+ *   'modules' will search in both modules/ and
+ *   sites/somesite/modules/.
+ * @param $key
+ *   The key to be passed to file_scan_directory().
+ * @param $min_depth
+ *   Minimum depth of directories to return files from.
+ *
+ * @return
+ *   An array of file objects of the specified type.
+ */
+function drupal_system_listing($mask, $directory, $key = 'name', $min_depth = 1) {
+  global $profile;
+  $config = conf_path();
+
+  // When this function is called during Drupal's initial installation process,
+  // the name of the profile that's about to be installed is stored in the global
+  // $profile variable. At all other times, the standard Drupal systems variable
+  // table contains the name of the current profile, and we can call variable_get()
+  // to determine what one is active.
+  if (!isset($profile)) {
+    $profile = variable_get('install_profile', 'default');
+  }
+  $searchdir = array($directory);
+  $files = array();
+
+  // Always search sites/all/* as well as the global directories
+  $searchdir[] = 'sites/all/'. $directory;
+
+  // The 'profiles' directory contains pristine collections of modules and
+  // themes as organized by a distribution.  It is pristine in the same way
+  // that /modules is pristine for core; users should avoid changing anything
+  // there in favor of sites/all or sites/<domain> directories.
+  if (file_exists("profiles/$profile/$directory")) {
+    $searchdir[] = "profiles/$profile/$directory";
+  }
+
+  if (file_exists("$config/$directory")) {
+    $searchdir[] = "$config/$directory";
+  }
+
+  // Get current list of items
+  foreach ($searchdir as $dir) {
+    $files = array_merge($files, file_scan_directory($dir, $mask, array('.', '..', 'CVS'), 0, TRUE, $key, $min_depth));
+  }
+
+  return $files;
+}
+
+/**
+ * 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;
+  }
+
+  $content = '';
+  // Either the elements did not go through form_builder or one of the children
+  // has a #weight.
+  if (!isset($elements['#sorted'])) {
+    uasort($elements, "_element_sort");
+  }
+  if (!isset($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 !== '') {
+    $prefix = isset($elements['#prefix']) ? $elements['#prefix'] : '';
+    $suffix = isset($elements['#suffix']) ? $elements['#suffix'] : '';
+    return $prefix . $content . $suffix;
+  }
+}
+
+/**
+ * Function used by uasort in drupal_render() to sort structured arrays
+ * by weight.
+ */
+function _element_sort($a, $b) {
+  $a_weight = (is_array($a) && isset($a['#weight'])) ? $a['#weight'] : 0;
+  $b_weight = (is_array($b) && isset($b['#weight'])) ? $b['#weight'] : 0;
+  if ($a_weight == $b_weight) {
+    return 0;
+  }
+  return ($a_weight < $b_weight) ? -1 : 1;
+}
+
+/**
+ * Check if the key is a property.
+ */
+function element_property($key) {
+  return $key[0] == '#';
+}
+
+/**
+ * Get properties of a structured array element. Properties begin with '#'.
+ */
+function element_properties($element) {
+  return array_filter(array_keys((array) $element), 'element_property');
+}
+
+/**
+ * Check if the key is a child.
+ */
+function element_child($key) {
+  return $key[0] != '#';
+}
+
+/**
+ * Get keys of a structured array tree element that are not properties
+ * (i.e., do not begin with '#').
+ */
+function element_children($element) {
+  return array_filter(array_keys((array) $element), 'element_child');
+}

patches/common.inc.5.0.patch

+--- common.inc	2007-01-29 20:04:16.000000000 -0500
++++ common.inc	2007-01-29 20:03:53.000000000 -0500
+@@ -368,6 +368,8 @@ function drupal_access_denied() {
+     $_REQUEST['destination'] = $_GET['q'];
+   }
+ 
++  $_SESSION['destination'] = $_GET['q'];
++
+   $path = drupal_get_normal_path(variable_get('site_403', ''));
+   if ($path && $path != $_GET['q']) {
+     menu_set_active_item($path);