- Patch #144634 by chx: fixed critical bug that prevented language negotiation to work after/when drupal_goto() is called.

includes/common.inc

@@ -1197,6 +1197,8 @@ function format_date($timestamp, $type = 'medium', $format = '', $timezone = NUL
  *       as in an RSS feed.
  *     'alias' (default FALSE)
  *       Whether the given path is an alias already.
+ *     'external'
+ *       Whether the given path is an external URL.
  * @return
  *   a string containing a URL to the given path.
  *
@@ -1211,6 +1213,12 @@ function url($path = NULL, $options = array()) {
     'absolute' => FALSE,
     'alias' => FALSE,
   );
+  if (!isset($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 dependant rewriting if language.inc is present
   if (function_exists('language_url_rewrite')) {
@@ -1223,10 +1231,7 @@ function url($path = NULL, $options = array()) {
     $options['query'] = drupal_query_string_encode($options['query']);
   }
 
-  // Return an external link if $path contains an allowed absolute URL.
-  // Only call the slow filter_xss_bad_protocol if $path contains a ':' before any / ? or #.
-  $colonpos = strpos($path, ':');
-  if ($colonpos !== FALSE && !preg_match('![/?#]!', substr($path, 0, $colonpos)) && filter_xss_bad_protocol($path, FALSE) == check_plain($path)) {
+  if ($options['external']) {
     // Split off the fragment
     if (strpos($path, '#') !== FALSE) {
       list($path, $old_fragment) = explode('#', $path, 2);

includes/language.inc

@@ -100,7 +100,7 @@ function language_url_rewrite(&$path, &$options) {
   global $language;
 
   // Only modify relative (insite) URLs.
-  if (!$options['absolute']) {
+  if (!$options['external']) {
 
     // Language can be passed as an option, or we go for current language.
     $path_language = isset($options['language']) ? $options['language'] : $language;