/drupal7/includes/menu.inc - Club Drupal - Forge Centrale Marseille

root / drupal7 / includes / menu.inc @ 01dfd3b5

       <?php
       /**
        * @file
        * API for the Drupal menu system.
        */
       /**
        * @defgroup menu Menu system
        * @{
        * Define the navigation menus, and route page requests to code based on URLs.
+       *
        * The Drupal menu system drives both the navigation system from a user
        * perspective and the callback system that Drupal uses to respond to URLs
        * passed from the browser. For this reason, a good understanding of the
        * menu system is fundamental to the creation of complex modules. As a note,
        * this is related to, but separate from menu.module, which allows menus
        * (which in this context are hierarchical lists of links) to be customized from
        * the Drupal administrative interface.
+       *
        * Drupal's menu system follows a simple hierarchy defined by paths.
        * Implementations of hook_menu() define menu items and assign them to
        * paths (which should be unique). The menu system aggregates these items
        * and determines the menu hierarchy from the paths. For example, if the
        * paths defined were a, a/b, e, a/b/c/d, f/g, and a/b/h, the menu system
        * would form the structure:
        * - a
        *   - a/b
        *     - a/b/c/d
        *     - a/b/h
        * - e
        * - f/g
        * Note that the number of elements in the path does not necessarily
        * determine the depth of the menu item in the tree.
+       *
        * When responding to a page request, the menu system looks to see if the
        * path requested by the browser is registered as a menu item with a
        * callback. If not, the system searches up the menu tree for the most
        * complete match with a callback it can find. If the path a/b/i is
        * requested in the tree above, the callback for a/b would be used.
+       *
        * The found callback function is called with any arguments specified
        * in the "page arguments" attribute of its menu item. The
        * attribute must be an array. After these arguments, any remaining
        * components of the path are appended as further arguments. In this
        * way, the callback for a/b above could respond to a request for
        * a/b/i differently than a request for a/b/j.
+       *
        * For an illustration of this process, see page_example.module.
+       *
        * Access to the callback functions is also protected by the menu system.
        * The "access callback" with an optional "access arguments" of each menu
        * item is called before the page callback proceeds. If this returns TRUE,
        * then access is granted; if FALSE, then access is denied. Default local task
        * menu items (see next paragraph) may omit this attribute to use the value
        * provided by the parent item.
+       *
        * In the default Drupal interface, you will notice many links rendered as
        * tabs. These are known in the menu system as "local tasks", and they are
        * rendered as tabs by default, though other presentations are possible.
        * Local tasks function just as other menu items in most respects. It is
        * convention that the names of these tasks should be short verbs if
        * possible. In addition, a "default" local task should be provided for
        * each set. When visiting a local task's parent menu item, the default
        * local task will be rendered as if it is selected; this provides for a
        * normal tab user experience. This default task is special in that it
        * links not to its provided path, but to its parent item's path instead.
        * The default task's path is only used to place it appropriately in the
        * menu hierarchy.
+       *
        * Everything described so far is stored in the menu_router table. The
        * menu_links table holds the visible menu links. By default these are
        * derived from the same hook_menu definitions, however you are free to
        * add more with menu_link_save().
        */
       /**
        * @defgroup menu_flags Menu flags
        * @{
        * Flags for use in the "type" attribute of menu items.
        */
       /**
        * Internal menu flag -- menu item is the root of the menu tree.
        */
       define('MENU_IS_ROOT', 0x0001);
       /**
        * Internal menu flag -- menu item is visible in the menu tree.
        */
       define('MENU_VISIBLE_IN_TREE', 0x0002);
       /**
        * Internal menu flag -- menu item is visible in the breadcrumb.
        */
       define('MENU_VISIBLE_IN_BREADCRUMB', 0x0004);
       /**
        * Internal menu flag -- menu item links back to its parent.
        */
       define('MENU_LINKS_TO_PARENT', 0x0008);
       /**
        * Internal menu flag -- menu item can be modified by administrator.
        */
       define('MENU_MODIFIED_BY_ADMIN', 0x0020);
       /**
        * Internal menu flag -- menu item was created by administrator.
        */
       define('MENU_CREATED_BY_ADMIN', 0x0040);
       /**
        * Internal menu flag -- menu item is a local task.
        */
       define('MENU_IS_LOCAL_TASK', 0x0080);
       /**
        * Internal menu flag -- menu item is a local action.
        */
       define('MENU_IS_LOCAL_ACTION', 0x0100);
       /**
        * @} End of "Menu flags".
        */
       /**
        * @defgroup menu_item_types Menu item types
        * @{
        * Definitions for various menu item types.
+       *
        * Menu item definitions provide one of these constants, which are shortcuts for
        * combinations of @link menu_flags Menu flags @endlink.
        */
       /**
        * Menu type -- A "normal" menu item that's shown in menu and breadcrumbs.
+       *
        * Normal menu items show up in the menu tree and can be moved/hidden by
        * the administrator. Use this for most menu items. It is the default value if
        * no menu item type is specified.
        */
       define('MENU_NORMAL_ITEM', MENU_VISIBLE_IN_TREE | MENU_VISIBLE_IN_BREADCRUMB);
       /**
        * Menu type -- A hidden, internal callback, typically used for API calls.
+       *
        * Callbacks simply register a path so that the correct function is fired
        * when the URL is accessed. They do not appear in menus or breadcrumbs.
        */
       define('MENU_CALLBACK', 0x0000);
       /**
        * Menu type -- A normal menu item, hidden until enabled by an administrator.
+       *
        * Modules may "suggest" menu items that the administrator may enable. They act
        * just as callbacks do until enabled, at which time they act like normal items.
        * Note for the value: 0x0010 was a flag which is no longer used, but this way
        * the values of MENU_CALLBACK and MENU_SUGGESTED_ITEM are separate.
        */
       define('MENU_SUGGESTED_ITEM', MENU_VISIBLE_IN_BREADCRUMB | 0x0010);
       /**
        * Menu type -- A task specific to the parent item, usually rendered as a tab.
+       *
        * Local tasks are menu items that describe actions to be performed on their
        * parent item. An example is the path "node/52/edit", which performs the
        * "edit" task on "node/52".
        */
       define('MENU_LOCAL_TASK', MENU_IS_LOCAL_TASK | MENU_VISIBLE_IN_BREADCRUMB);
       /**
        * Menu type -- The "default" local task, which is initially active.
+       *
        * Every set of local tasks should provide one "default" task, that links to the
        * same path as its parent when clicked.
        */
       define('MENU_DEFAULT_LOCAL_TASK', MENU_IS_LOCAL_TASK | MENU_LINKS_TO_PARENT | MENU_VISIBLE_IN_BREADCRUMB);
       /**
        * Menu type -- An action specific to the parent, usually rendered as a link.
+       *
        * Local actions are menu items that describe actions on the parent item such
        * as adding a new user, taxonomy term, etc.
        */
       define('MENU_LOCAL_ACTION', MENU_IS_LOCAL_TASK | MENU_IS_LOCAL_ACTION | MENU_VISIBLE_IN_BREADCRUMB);
       /**
        * @} End of "Menu item types".
        */
       /**
        * @defgroup menu_context_types Menu context types
        * @{
        * Flags for use in the "context" attribute of menu router items.
        */
       /**
        * Internal menu flag: Invisible local task.
+       *
        * This flag may be used for local tasks like "Delete", so custom modules and
        * themes can alter the default context and expose the task by altering menu.
        */
       define('MENU_CONTEXT_NONE', 0x0000);
       /**
        * Internal menu flag: Local task should be displayed in page context.
        */
       define('MENU_CONTEXT_PAGE', 0x0001);
       /**
        * Internal menu flag: Local task should be displayed inline.
        */
       define('MENU_CONTEXT_INLINE', 0x0002);
       /**
        * @} End of "Menu context types".
        */
       /**
        * @defgroup menu_status_codes Menu status codes
        * @{
        * Status codes for menu callbacks.
        */
       /**
        * Internal menu status code -- Menu item was found.
        */
       define('MENU_FOUND', 1);
       /**
        * Menu status code -- Not found.
+       *
        * This can be used as the return value from a page callback, although it is
        * preferable to use a load function to accomplish this; see the hook_menu()
        * documentation for details.
        */
       define('MENU_NOT_FOUND', 2);
       /**
        * Menu status code -- Access denied.
+       *
        * This can be used as the return value from a page callback, although it is
        * preferable to use an access callback to accomplish this; see the hook_menu()
        * documentation for details.
        */
       define('MENU_ACCESS_DENIED', 3);
       /**
        * Internal menu status code -- Menu item inaccessible because site is offline.
        */
       define('MENU_SITE_OFFLINE', 4);
       /**
        * Internal menu status code -- Everything is working fine.
        */
       define('MENU_SITE_ONLINE', 5);
       /**
        * @} End of "Menu status codes".
        */
       /**
        * @defgroup menu_tree_parameters Menu tree parameters
        * @{
        * Parameters for a menu tree.
        */
        /**
        * The maximum number of path elements for a menu callback
        */
       define('MENU_MAX_PARTS', 9);
       /**
        * The maximum depth of a menu links tree - matches the number of p columns.
        */
       define('MENU_MAX_DEPTH', 9);
       /**
        * @} End of "Menu tree parameters".
        */
       /**
        * Reserved key to identify the most specific menu link for a given path.
+       *
        * The value of this constant is a hash of the constant name. We use the hash
        * so that the reserved key is over 32 characters in length and will not
        * collide with allowed menu names:
        * @code
        * sha1('MENU_PREFERRED_LINK') = 1cf698d64d1aa4b83907cf6ed55db3a7f8e92c91
        * @endcode
+       *
        * @see menu_link_get_preferred()
        */
       define('MENU_PREFERRED_LINK', '1cf698d64d1aa4b83907cf6ed55db3a7f8e92c91');
       /**
        * Returns the ancestors (and relevant placeholders) for any given path.
+       *
        * For example, the ancestors of node/12345/edit are:
        * - node/12345/edit
        * - node/12345/%
        * - node/%/edit
        * - node/%/%
        * - node/12345
        * - node/%
        * - node
+       *
        * To generate these, we will use binary numbers. Each bit represents a
        * part of the path. If the bit is 1, then it represents the original
        * value while 0 means wildcard. If the path is node/12/edit/foo
        * then the 1011 bitstring represents node/%/edit/foo where % means that
        * any argument matches that part. We limit ourselves to using binary
        * numbers that correspond the patterns of wildcards of router items that
        * actually exists. This list of 'masks' is built in menu_rebuild().
+       *
        * @param $parts
        *   An array of path parts; for the above example,
        *   array('node', '12345', 'edit').
+       *
        * @return
        *   An array which contains the ancestors and placeholders. Placeholders
        *   simply contain as many '%s' as the ancestors.
        */
       function menu_get_ancestors($parts) {
         $number_parts = count($parts);
         $ancestors = array();
         $length =  $number_parts - 1;
         $end = (1 << $number_parts) - 1;
         $masks = variable_get('menu_masks');
         // If the optimized menu_masks array is not available use brute force to get
         // the correct $ancestors and $placeholders returned. Do not use this as the
         // default value of the menu_masks variable to avoid building such a big
         // array.
         if (!$masks) {
           $masks = range(511, 1);
+        }
         // Only examine patterns that actually exist as router items (the masks).
         foreach ($masks as $i) {
           if ($i > $end) {
             // Only look at masks that are not longer than the path of interest.
             continue;
+          }
           elseif ($i < (1 << $length)) {
             // We have exhausted the masks of a given length, so decrease the length.
             --$length;
+          }
           $current = '';
           for ($j = $length; $j >= 0; $j--) {
             // Check the bit on the $j offset.
             if ($i & (1 << $j)) {
               // Bit one means the original value.
               $current .= $parts[$length - $j];
+            }
             else {
               // Bit zero means means wildcard.
               $current .= '%';
+            }
             // Unless we are at offset 0, add a slash.
             if ($j) {
               $current .= '/';
+            }
+          }
           $ancestors[] = $current;
+        }
         return $ancestors;
+      }
       /**
        * Unserializes menu data, using a map to replace path elements.
+       *
        * The menu system stores various path-related information (such as the 'page
        * arguments' and 'access arguments' components of a menu item) in the database
        * using serialized arrays, where integer values in the arrays represent
        * arguments to be replaced by values from the path. This function first
        * unserializes such menu information arrays, and then does the path
        * replacement.
+       *
        * The path replacement acts on each integer-valued element of the unserialized
        * menu data array ($data) using a map array ($map, which is typically an array
        * of path arguments) as a list of replacements. For instance, if there is an
        * element of $data whose value is the number 2, then it is replaced in $data
        * with $map[2]; non-integer values in $data are left alone.
+       *
        * As an example, an unserialized $data array with elements ('node_load', 1)
        * represents instructions for calling the node_load() function. Specifically,
        * this instruction says to use the path component at index 1 as the input
        * parameter to node_load(). If the path is 'node/123', then $map will be the
        * array ('node', 123), and the returned array from this function will have
        * elements ('node_load', 123), since $map[1] is 123. This return value will
        * indicate specifically that node_load(123) is to be called to load the node
        * whose ID is 123 for this menu item.
+       *
        * @param $data
        *   A serialized array of menu data, as read from the database.
        * @param $map
        *   A path argument array, used to replace integer values in $data; an integer
        *   value N in $data will be replaced by value $map[N]. Typically, the $map
        *   array is generated from a call to the arg() function.
+       *
        * @return
        *   The unserialized $data array, with path arguments replaced.
        */
       function menu_unserialize($data, $map) {
         if ($data = unserialize($data)) {
           foreach ($data as $k => $v) {
             if (is_int($v)) {
               $data[$k] = isset($map[$v]) ? $map[$v] : '';
+            }
+          }
           return $data;
+        }
         else {
           return array();
+        }
+      }
       /**
        * Replaces the statically cached item for a given path.
+       *
        * @param $path
        *   The path.
        * @param $router_item
        *   The router item. Usually a router entry from menu_get_item() is either
        *   modified or set to a different path. This allows the navigation block,
        *   the page title, the breadcrumb, and the page help to be modified in one
        *   call.
        */
       function menu_set_item($path, $router_item) {
         menu_get_item($path, $router_item);
+      }
       /**
        * Gets a router item.
+       *
        * @param $path
        *   The path; for example, 'node/5'. The function will find the corresponding
        *   node/% item and return that. Defaults to the current path.
        * @param $router_item
        *   Internal use only.
+       *
        * @return
        *   The router item or, if an error occurs in _menu_translate(), FALSE. A
        *   router item is an associative array corresponding to one row in the
        *   menu_router table. The value corresponding to the key 'map' holds the
        *   loaded objects. The value corresponding to the key 'access' is TRUE if the
        *   current user can access this page. The values corresponding to the keys
        *   'title', 'page_arguments', 'access_arguments', and 'theme_arguments' will
        *   be filled in based on the database values and the objects loaded.
        */
       function menu_get_item($path = NULL, $router_item = NULL) {
         $router_items = &drupal_static(__FUNCTION__);
         if (!isset($path)) {
           $path = $_GET['q'];
+        }
         if (isset($router_item)) {
           $router_items[$path] = $router_item;
+        }
         if (!isset($router_items[$path])) {
           // Rebuild if we know it's needed, or if the menu masks are missing which
           // occurs rarely, likely due to a race condition of multiple rebuilds.
           if (variable_get('menu_rebuild_needed', FALSE) || !variable_get('menu_masks', array())) {
             if (_menu_check_rebuild()) {
               menu_rebuild();
+            }
+          }
           $original_map = arg(NULL, $path);
           $parts = array_slice($original_map, 0, MENU_MAX_PARTS);
           $ancestors = menu_get_ancestors($parts);
           $router_item = db_query_range('SELECT * FROM {menu_router} WHERE path IN (:ancestors) ORDER BY fit DESC', 0, 1, array(':ancestors' => $ancestors))->fetchAssoc();
           if ($router_item) {
             // Allow modules to alter the router item before it is translated and
             // checked for access.
             drupal_alter('menu_get_item', $router_item, $path, $original_map);
             $map = _menu_translate($router_item, $original_map);
             $router_item['original_map'] = $original_map;
             if ($map === FALSE) {
               $router_items[$path] = FALSE;
               return FALSE;
+            }
             if ($router_item['access']) {
               $router_item['map'] = $map;
               $router_item['page_arguments'] = array_merge(menu_unserialize($router_item['page_arguments'], $map), array_slice($map, $router_item['number_parts']));
               $router_item['theme_arguments'] = array_merge(menu_unserialize($router_item['theme_arguments'], $map), array_slice($map, $router_item['number_parts']));
+            }
+          }
           $router_items[$path] = $router_item;
+        }
         return $router_items[$path];
+      }
       /**
        * Execute the page callback associated with the current path.
+       *
        * @param $path
        *   The drupal path whose handler is to be be executed. If set to NULL, then
        *   the current path is used.
        * @param $deliver
        *   (optional) A boolean to indicate whether the content should be sent to the
        *   browser using the appropriate delivery callback (TRUE) or whether to return
        *   the result to the caller (FALSE).
        */
       function menu_execute_active_handler($path = NULL, $deliver = TRUE) {
         // Check if site is offline.
         $page_callback_result = _menu_site_is_offline() ? MENU_SITE_OFFLINE : MENU_SITE_ONLINE;
         // Allow other modules to change the site status but not the path because that
         // would not change the global variable. hook_url_inbound_alter() can be used
         // to change the path. Code later will not use the $read_only_path variable.
         $read_only_path = !empty($path) ? $path : $_GET['q'];
         drupal_alter('menu_site_status', $page_callback_result, $read_only_path);
         // Only continue if the site status is not set.
         if ($page_callback_result == MENU_SITE_ONLINE) {
           if ($router_item = menu_get_item($path)) {
             if ($router_item['access']) {
               if ($router_item['include_file']) {
                 require_once DRUPAL_ROOT . '/' . $router_item['include_file'];
+              }
               $page_callback_result = call_user_func_array($router_item['page_callback'], $router_item['page_arguments']);
+            }
             else {
               $page_callback_result = MENU_ACCESS_DENIED;
+            }
+          }
           else {
             $page_callback_result = MENU_NOT_FOUND;
+          }
+        }
         // Deliver the result of the page callback to the browser, or if requested,
         // return it raw, so calling code can do more processing.
         if ($deliver) {
           $default_delivery_callback = (isset($router_item) && $router_item) ? $router_item['delivery_callback'] : NULL;
           drupal_deliver_page($page_callback_result, $default_delivery_callback);
+        }
         else {
           return $page_callback_result;
+        }
+      }
       /**
        * Loads objects into the map as defined in the $item['load_functions'].
+       *
        * @param $item
        *   A menu router or menu link item
        * @param $map
        *   An array of path arguments; for example, array('node', '5').
+       *
        * @return
        *   Returns TRUE for success, FALSE if an object cannot be loaded.
        *   Names of object loading functions are placed in $item['load_functions'].
        *   Loaded objects are placed in $map[]; keys are the same as keys in the
        *   $item['load_functions'] array.
        *   $item['access'] is set to FALSE if an object cannot be loaded.
        */
       function _menu_load_objects(&$item, &$map) {
         if ($load_functions = $item['load_functions']) {
           // If someone calls this function twice, then unserialize will fail.
           if (!is_array($load_functions)) {
             $load_functions = unserialize($load_functions);
+          }
           $path_map = $map;
           foreach ($load_functions as $index => $function) {
             if ($function) {
               $value = isset($path_map[$index]) ? $path_map[$index] : '';
               if (is_array($function)) {
                 // Set up arguments for the load function. These were pulled from
                 // 'load arguments' in the hook_menu() entry, but they need
                 // some processing. In this case the $function is the key to the
                 // load_function array, and the value is the list of arguments.
                 $args = current($function);
                 $function = key($function);
                 $load_functions[$index] = $function;
                 // Some arguments are placeholders for dynamic items to process.
                 foreach ($args as $i => $arg) {
                   if ($arg === '%index') {
                     // Pass on argument index to the load function, so multiple
                     // occurrences of the same placeholder can be identified.
                     $args[$i] = $index;
+                  }
                   if ($arg === '%map') {
                     // Pass on menu map by reference. The accepting function must
                     // also declare this as a reference if it wants to modify
                     // the map.
                     $args[$i] = &$map;
+                  }
                   if (is_int($arg)) {
                     $args[$i] = isset($path_map[$arg]) ? $path_map[$arg] : '';
+                  }
+                }
                 array_unshift($args, $value);
                 $return = call_user_func_array($function, $args);
+              }
               else {
                 $return = $function($value);
+              }
               // If callback returned an error or there is no callback, trigger 404.
               if ($return === FALSE) {
                 $item['access'] = FALSE;
                 $map = FALSE;
                 return FALSE;
+              }
               $map[$index] = $return;
+            }
+          }
           $item['load_functions'] = $load_functions;
+        }
         return TRUE;
+      }
       /**
        * Checks access to a menu item using the access callback.
+       *
        * @param $item
        *   A menu router or menu link item
        * @param $map
        *   An array of path arguments; for example, array('node', '5').
+       *
        * @return
        *   $item['access'] becomes TRUE if the item is accessible, FALSE otherwise.
        */
       function _menu_check_access(&$item, $map) {
         $item['access'] = FALSE;
         // Determine access callback, which will decide whether or not the current
         // user has access to this path.
         $callback = empty($item['access_callback']) ? 0 : trim($item['access_callback']);
         // Check for a TRUE or FALSE value.
         if (is_numeric($callback)) {
           $item['access'] = (bool) $callback;
+        }
         else {
           $arguments = menu_unserialize($item['access_arguments'], $map);
           // As call_user_func_array is quite slow and user_access is a very common
           // callback, it is worth making a special case for it.
           if ($callback == 'user_access') {
             $item['access'] = (count($arguments) == 1) ? user_access($arguments[0]) : user_access($arguments[0], $arguments[1]);
+          }
           elseif (function_exists($callback)) {
             $item['access'] = call_user_func_array($callback, $arguments);
+          }
+        }
+      }
       /**
        * Localizes the router item title using t() or another callback.
+       *
        * Translate the title and description to allow storage of English title
        * strings in the database, yet display of them in the language required
        * by the current user.
+       *
        * @param $item
        *   A menu router item or a menu link item.
        * @param $map
        *   The path as an array with objects already replaced. E.g., for path
        *   node/123 $map would be array('node', $node) where $node is the node
        *   object for node 123.
        * @param $link_translate
        *   TRUE if we are translating a menu link item; FALSE if we are
        *   translating a menu router item.
+       *
        * @return
        *   No return value.
        *   $item['title'] is localized according to $item['title_callback'].
        *   If an item's callback is check_plain(), $item['options']['html'] becomes
        *   TRUE.
        *   $item['description'] is translated using t().
        *   When doing link translation and the $item['options']['attributes']['title']
        *   (link title attribute) matches the description, it is translated as well.
        */
       function _menu_item_localize(&$item, $map, $link_translate = FALSE) {
         $callback = $item['title_callback'];
         $item['localized_options'] = $item['options'];
         // All 'class' attributes are assumed to be an array during rendering, but
         // links stored in the database may use an old string value.
         // @todo In order to remove this code we need to implement a database update
         //   including unserializing all existing link options and running this code
         //   on them, as well as adding validation to menu_link_save().
         if (isset($item['options']['attributes']['class']) && is_string($item['options']['attributes']['class'])) {
           $item['localized_options']['attributes']['class'] = explode(' ', $item['options']['attributes']['class']);
+        }
         // If we are translating the title of a menu link, and its title is the same
         // as the corresponding router item, then we can use the title information
         // from the router. If it's customized, then we need to use the link title
         // itself; can't localize.
         // If we are translating a router item (tabs, page, breadcrumb), then we
         // can always use the information from the router item.
         if (!$link_translate || ($item['title'] == $item['link_title'])) {
           // t() is a special case. Since it is used very close to all the time,
           // we handle it directly instead of using indirect, slower methods.
           if ($callback == 't') {
             if (empty($item['title_arguments'])) {
               $item['title'] = t($item['title']);
+            }
             else {
               $item['title'] = t($item['title'], menu_unserialize($item['title_arguments'], $map));
+            }
+          }
           elseif ($callback && function_exists($callback)) {
             if (empty($item['title_arguments'])) {
               $item['title'] = $callback($item['title']);
+            }
             else {
               $item['title'] = call_user_func_array($callback, menu_unserialize($item['title_arguments'], $map));
+            }
             // Avoid calling check_plain again on l() function.
             if ($callback == 'check_plain') {
               $item['localized_options']['html'] = TRUE;
+            }
+          }
+        }
         elseif ($link_translate) {
           $item['title'] = $item['link_title'];
+        }
         // Translate description, see the motivation above.
         if (!empty($item['description'])) {
           $original_description = $item['description'];
           $item['description'] = t($item['description']);
           if ($link_translate && isset($item['options']['attributes']['title']) && $item['options']['attributes']['title'] == $original_description) {
             $item['localized_options']['attributes']['title'] = $item['description'];
+          }
+        }
+      }
       /**
        * Handles dynamic path translation and menu access control.
+       *
        * When a user arrives on a page such as node/5, this function determines
        * what "5" corresponds to, by inspecting the page's menu path definition,
        * node/%node. This will call node_load(5) to load the corresponding node
        * object.
+       *
        * It also works in reverse, to allow the display of tabs and menu items which
        * contain these dynamic arguments, translating node/%node to node/5.
+       *
        * Translation of menu item titles and descriptions are done here to
        * allow for storage of English strings in the database, and translation
        * to the language required to generate the current page.
+       *
        * @param $router_item
        *   A menu router item
        * @param $map
        *   An array of path arguments; for example, array('node', '5').
        * @param $to_arg
        *   Execute $item['to_arg_functions'] or not. Use only if you want to render a
        *   path from the menu table, for example tabs.
+       *
        * @return
        *   Returns the map with objects loaded as defined in the
        *   $item['load_functions']. $item['access'] becomes TRUE if the item is
        *   accessible, FALSE otherwise. $item['href'] is set according to the map.
        *   If an error occurs during calling the load_functions (like trying to load
        *   a non-existent node) then this function returns FALSE.
        */
       function _menu_translate(&$router_item, $map, $to_arg = FALSE) {
         if ($to_arg && !empty($router_item['to_arg_functions'])) {
           // Fill in missing path elements, such as the current uid.
           _menu_link_map_translate($map, $router_item['to_arg_functions']);
+        }
         // The $path_map saves the pieces of the path as strings, while elements in
         // $map may be replaced with loaded objects.
         $path_map = $map;
         if (!empty($router_item['load_functions']) && !_menu_load_objects($router_item, $map)) {
           // An error occurred loading an object.
           $router_item['access'] = FALSE;
           return FALSE;
+        }
         // Generate the link path for the page request or local tasks.
         $link_map = explode('/', $router_item['path']);
         if (isset($router_item['tab_root'])) {
           $tab_root_map = explode('/', $router_item['tab_root']);
+        }
         if (isset($router_item['tab_parent'])) {
           $tab_parent_map = explode('/', $router_item['tab_parent']);
+        }
         for ($i = 0; $i < $router_item['number_parts']; $i++) {
           if ($link_map[$i] == '%') {
             $link_map[$i] = $path_map[$i];
+          }
           if (isset($tab_root_map[$i]) && $tab_root_map[$i] == '%') {
             $tab_root_map[$i] = $path_map[$i];
+          }
           if (isset($tab_parent_map[$i]) && $tab_parent_map[$i] == '%') {
             $tab_parent_map[$i] = $path_map[$i];
+          }
+        }
         $router_item['href'] = implode('/', $link_map);
         $router_item['tab_root_href'] = implode('/', $tab_root_map);
         $router_item['tab_parent_href'] = implode('/', $tab_parent_map);
         $router_item['options'] = array();
         _menu_check_access($router_item, $map);
         // For performance, don't localize an item the user can't access.
         if ($router_item['access']) {
           _menu_item_localize($router_item, $map);
+        }
         return $map;
+      }
       /**
        * Translates the path elements in the map using any to_arg helper function.
+       *
        * @param $map
        *   An array of path arguments; for example, array('node', '5').
        * @param $to_arg_functions
        *   An array of helper functions; for example, array(2 => 'menu_tail_to_arg').
+       *
        * @see hook_menu()
        */
       function _menu_link_map_translate(&$map, $to_arg_functions) {
         $to_arg_functions = unserialize($to_arg_functions);
         foreach ($to_arg_functions as $index => $function) {
           // Translate place-holders into real values.
           $arg = $function(!empty($map[$index]) ? $map[$index] : '', $map, $index);
           if (!empty($map[$index]) || isset($arg)) {
             $map[$index] = $arg;
+          }
           else {
             unset($map[$index]);
+          }
+        }
+      }
       /**
        * Returns a string containing the path relative to the current index.
        */
       function menu_tail_to_arg($arg, $map, $index) {
         return implode('/', array_slice($map, $index));
+      }
       /**
        * Loads the path as one string relative to the current index.
+       *
        * To use this load function, you must specify the load arguments
        * in the router item as:
        * @code
        * $item['load arguments'] = array('%map', '%index');
        * @endcode
+       *
        * @see search_menu().
        */
       function menu_tail_load($arg, &$map, $index) {
         $arg = implode('/', array_slice($map, $index));
         $map = array_slice($map, 0, $index);
         return $arg;
+      }
       /**
        * Provides menu link access control, translation, and argument handling.
+       *
        * This function is similar to _menu_translate(), but it also does
        * link-specific preparation (such as always calling to_arg() functions).
+       *
        * @param $item
        *   A menu link.
        * @param $translate
        *   (optional) Whether to try to translate a link containing dynamic path
        *   argument placeholders (%) based on the menu router item of the current
        *   path. Defaults to FALSE. Internally used for breadcrumbs.
+       *
        * @return
        *   Returns the map of path arguments with objects loaded as defined in the
        *   $item['load_functions'].
        *   $item['access'] becomes TRUE if the item is accessible, FALSE otherwise.
        *   $item['href'] is generated from link_path, possibly by to_arg functions.
        *   $item['title'] is generated from link_title, and may be localized.
        *   $item['options'] is unserialized; it is also changed within the call here
        *   to $item['localized_options'] by _menu_item_localize().
        */
       function _menu_link_translate(&$item, $translate = FALSE) {
         if (!is_array($item['options'])) {
           $item['options'] = unserialize($item['options']);
+        }
         if ($item['external']) {
           $item['access'] = 1;
           $map = array();
           $item['href'] = $item['link_path'];
           $item['title'] = $item['link_title'];
           $item['localized_options'] = $item['options'];
+        }
         else {
           // Complete the path of the menu link with elements from the current path,
           // if it contains dynamic placeholders (%).
           $map = explode('/', $item['link_path']);
           if (strpos($item['link_path'], '%') !== FALSE) {
             // Invoke registered to_arg callbacks.
             if (!empty($item['to_arg_functions'])) {
               _menu_link_map_translate($map, $item['to_arg_functions']);
+            }
             // Or try to derive the path argument map from the current router item,
             // if this $item's path is within the router item's path. This means
             // that if we are on the current path 'foo/%/bar/%/baz', then
             // menu_get_item() will have translated the menu router item for the
             // current path, and we can take over the argument map for a link like
             // 'foo/%/bar'. This inheritance is only valid for breadcrumb links.
             // @see _menu_tree_check_access()
             // @see menu_get_active_breadcrumb()
             elseif ($translate && ($current_router_item = menu_get_item())) {
               // If $translate is TRUE, then this link is in the active trail.
               // Only translate paths within the current path.
               if (strpos($current_router_item['path'], $item['link_path']) === 0) {
                 $count = count($map);
                 $map = array_slice($current_router_item['original_map'], 0, $count);
                 $item['original_map'] = $map;
                 if (isset($current_router_item['map'])) {
                   $item['map'] = array_slice($current_router_item['map'], 0, $count);
+                }
                 // Reset access to check it (for the first time).
                 unset($item['access']);
+              }
+            }
+          }
           $item['href'] = implode('/', $map);
           // Skip links containing untranslated arguments.
           if (strpos($item['href'], '%') !== FALSE) {
             $item['access'] = FALSE;
             return FALSE;
+          }
           // menu_tree_check_access() may set this ahead of time for links to nodes.
           if (!isset($item['access'])) {
             if (!empty($item['load_functions']) && !_menu_load_objects($item, $map)) {
               // An error occurred loading an object.
               $item['access'] = FALSE;
               return FALSE;
+            }
             _menu_check_access($item, $map);
+          }
           // For performance, don't localize a link the user can't access.
           if ($item['access']) {
             _menu_item_localize($item, $map, TRUE);
+          }
+        }
         // Allow other customizations - e.g. adding a page-specific query string to the
         // options array. For performance reasons we only invoke this hook if the link
         // has the 'alter' flag set in the options array.
         if (!empty($item['options']['alter'])) {
           drupal_alter('translated_menu_link', $item, $map);
+        }
         return $map;
+      }
       /**
        * Gets a loaded object from a router item.
+       *
        * menu_get_object() provides access to objects loaded by the current router
        * item. For example, on the page node/%node, the router loads the %node object,
        * and calling menu_get_object() will return that. Normally, it is necessary to
        * specify the type of object referenced, however node is the default.
        * The following example tests to see whether the node being displayed is of the
        * "story" content type:
        * @code
        * $node = menu_get_object();
        * $story = $node->type == 'story';
        * @endcode
+       *
        * @param $type
        *   Type of the object. These appear in hook_menu definitions as %type. Core
        *   provides aggregator_feed, aggregator_category, contact, filter_format,
        *   forum_term, menu, menu_link, node, taxonomy_vocabulary, user. See the
        *   relevant {$type}_load function for more on each. Defaults to node.
        * @param $position
        *   The position of the object in the path, where the first path segment is 0.
        *   For node/%node, the position of %node is 1, but for comment/reply/%node,
        *   it's 2. Defaults to 1.
        * @param $path
        *   See menu_get_item() for more on this. Defaults to the current path.
        */
       function menu_get_object($type = 'node', $position = 1, $path = NULL) {
         $router_item = menu_get_item($path);
         if (isset($router_item['load_functions'][$position]) && !empty($router_item['map'][$position]) && $router_item['load_functions'][$position] == $type . '_load') {
           return $router_item['map'][$position];
+        }
+      }
       /**
        * Renders a menu tree based on the current path.
+       *
        * The tree is expanded based on the current path and dynamic paths are also
        * changed according to the defined to_arg functions (for example the 'My
        * account' link is changed from user/% to a link with the current user's uid).
+       *
        * @param $menu_name
        *   The name of the menu.
+       *
        * @return
        *   A structured array representing the specified menu on the current page, to
        *   be rendered by drupal_render().
        */
       function menu_tree($menu_name) {
         $menu_output = &drupal_static(__FUNCTION__, array());
         if (!isset($menu_output[$menu_name])) {
           $tree = menu_tree_page_data($menu_name);
           $menu_output[$menu_name] = menu_tree_output($tree);
+        }
         return $menu_output[$menu_name];
+      }
       /**
        * Returns an output structure for rendering a menu tree.
+       *
        * The menu item's LI element is given one of the following classes:
        * - expanded: The menu item is showing its submenu.
        * - collapsed: The menu item has a submenu which is not shown.
        * - leaf: The menu item has no submenu.
+       *
        * @param $tree
        *   A data structure representing the tree as returned from menu_tree_data.
+       *
        * @return
        *   A structured array to be rendered by drupal_render().
        */
       function menu_tree_output($tree) {
         $build = array();
         $items = array();
         // Pull out just the menu links we are going to render so that we
         // get an accurate count for the first/last classes.
         foreach ($tree as $data) {
           if ($data['link']['access'] && !$data['link']['hidden']) {
             $items[] = $data;
+          }
+        }
         $router_item = menu_get_item();
         $num_items = count($items);
         foreach ($items as $i => $data) {
           $class = array();
           if ($i == 0) {
             $class[] = 'first';
+          }
           if ($i == $num_items - 1) {
             $class[] = 'last';
+          }
           // Set a class for the <li>-tag. Since $data['below'] may contain local
           // tasks, only set 'expanded' class if the link also has children within
           // the current menu.
           if ($data['link']['has_children'] && $data['below']) {
             $class[] = 'expanded';
+          }
           elseif ($data['link']['has_children']) {
             $class[] = 'collapsed';
+          }
           else {
             $class[] = 'leaf';
+          }
           // Set a class if the link is in the active trail.
           if ($data['link']['in_active_trail']) {
             $class[] = 'active-trail';
             $data['link']['localized_options']['attributes']['class'][] = 'active-trail';
+          }
           // Normally, l() compares the href of every link with $_GET['q'] and sets
           // the active class accordingly. But local tasks do not appear in menu
           // trees, so if the current path is a local task, and this link is its
           // tab root, then we have to set the class manually.
           if ($router_item && $data['link']['href'] == $router_item['tab_root_href'] && $data['link']['href'] != $_GET['q']) {
             $data['link']['localized_options']['attributes']['class'][] = 'active';
+          }
           // Allow menu-specific theme overrides.
           $element['#theme'] = 'menu_link__' . strtr($data['link']['menu_name'], '-', '_');
           $element['#attributes']['class'] = $class;
           $element['#title'] = $data['link']['title'];
           $element['#href'] = $data['link']['href'];
           $element['#localized_options'] = !empty($data['link']['localized_options']) ? $data['link']['localized_options'] : array();
           $element['#below'] = $data['below'] ? menu_tree_output($data['below']) : $data['below'];
           $element['#original_link'] = $data['link'];
           // Index using the link's unique mlid.
           $build[$data['link']['mlid']] = $element;
+        }
         if ($build) {
           // Make sure drupal_render() does not re-order the links.
           $build['#sorted'] = TRUE;
           // Add the theme wrapper for outer markup.
           // Allow menu-specific theme overrides.
           $build['#theme_wrappers'][] = 'menu_tree__' . strtr($data['link']['menu_name'], '-', '_');
+        }
         return $build;
+      }
       /**
        * Gets the data structure representing a named menu tree.
+       *
        * Since this can be the full tree including hidden items, the data returned
        * may be used for generating an an admin interface or a select.
+       *
        * @param $menu_name
        *   The named menu links to return
        * @param $link
        *   A fully loaded menu link, or NULL. If a link is supplied, only the
        *   path to root will be included in the returned tree - as if this link
        *   represented the current page in a visible menu.
        * @param $max_depth
        *   Optional maximum depth of links to retrieve. Typically useful if only one
        *   or two levels of a sub tree are needed in conjunction with a non-NULL
        *   $link, in which case $max_depth should be greater than $link['depth'].
+       *
        * @return
        *   An tree of menu links in an array, in the order they should be rendered.
        */
       function menu_tree_all_data($menu_name, $link = NULL, $max_depth = NULL) {
         $tree = &drupal_static(__FUNCTION__, array());
         // Use $mlid as a flag for whether the data being loaded is for the whole tree.
         $mlid = isset($link['mlid']) ? $link['mlid'] : 0;
         // Generate a cache ID (cid) specific for this $menu_name, $link, $language, and depth.
         $cid = 'links:' . $menu_name . ':all:' . $mlid . ':' . $GLOBALS['language']->language . ':' . (int) $max_depth;
         if (!isset($tree[$cid])) {
           // If the static variable doesn't have the data, check {cache_menu}.
           $cache = cache_get($cid, 'cache_menu');
           if ($cache && isset($cache->data)) {
             // If the cache entry exists, it contains the parameters for
             // menu_build_tree().
             $tree_parameters = $cache->data;
+          }
           // If the tree data was not in the cache, build $tree_parameters.
           if (!isset($tree_parameters)) {
             $tree_parameters = array(
               'min_depth' => 1,
               'max_depth' => $max_depth,
             );
             if ($mlid) {
               // The tree is for a single item, so we need to match the values in its
               // p columns and 0 (the top level) with the plid values of other links.
               $parents = array(0);
               for ($i = 1; $i < MENU_MAX_DEPTH; $i++) {
                 if (!empty($link["p$i"])) {
                   $parents[] = $link["p$i"];
+                }
+              }
               $tree_parameters['expanded'] = $parents;
               $tree_parameters['active_trail'] = $parents;
               $tree_parameters['active_trail'][] = $mlid;
+            }
             // Cache the tree building parameters using the page-specific cid.
             cache_set($cid, $tree_parameters, 'cache_menu');
+          }
           // Build the tree using the parameters; the resulting tree will be cached
           // by _menu_build_tree()).
           $tree[$cid] = menu_build_tree($menu_name, $tree_parameters);
+        }
         return $tree[$cid];
+      }
       /**
        * Sets the path for determining the active trail of the specified menu tree.
+       *
        * This path will also affect the breadcrumbs under some circumstances.
        * Breadcrumbs are built using the preferred link returned by
        * menu_link_get_preferred(). If the preferred link is inside one of the menus
        * specified in calls to menu_tree_set_path(), the preferred link will be
        * overridden by the corresponding path returned by menu_tree_get_path().
+       *
        * Setting this path does not affect the main content; for that use
        * menu_set_active_item() instead.
+       *
        * @param $menu_name
        *   The name of the affected menu tree.
        * @param $path
        *   The path to use when finding the active trail.
        */
       function menu_tree_set_path($menu_name, $path = NULL) {
         $paths = &drupal_static(__FUNCTION__);
         if (isset($path)) {
           $paths[$menu_name] = $path;
+        }
         return isset($paths[$menu_name]) ? $paths[$menu_name] : NULL;
+      }
       /**
        * Gets the path for determining the active trail of the specified menu tree.
+       *
        * @param $menu_name
        *   The menu name of the requested tree.
+       *
        * @return
        *   A string containing the path. If no path has been specified with
        *   menu_tree_set_path(), NULL is returned.
        */
       function menu_tree_get_path($menu_name) {
         return menu_tree_set_path($menu_name);
+      }
       /**
        * Gets the data structure for a named menu tree, based on the current page.
+       *
        * The tree order is maintained by storing each parent in an individual
        * field, see http://drupal.org/node/141866 for more.
+       *
        * @param $menu_name
        *   The named menu links to return.
        * @param $max_depth
        *   (optional) The maximum depth of links to retrieve.
        * @param $only_active_trail
        *   (optional) Whether to only return the links in the active trail (TRUE)
        *   instead of all links on every level of the menu link tree (FALSE). Defaults
        *   to FALSE. Internally used for breadcrumbs only.
+       *
        * @return
        *   An array of menu links, in the order they should be rendered. The array
        *   is a list of associative arrays -- these have two keys, link and below.
        *   link is a menu item, ready for theming as a link. Below represents the
        *   submenu below the link if there is one, and it is a subtree that has the
        *   same structure described for the top-level array.
        */
       function menu_tree_page_data($menu_name, $max_depth = NULL, $only_active_trail = FALSE) {
         $tree = &drupal_static(__FUNCTION__, array());
         // Check if the active trail has been overridden for this menu tree.
         $active_path = menu_tree_get_path($menu_name);
         // Load the menu item corresponding to the current page.
         if ($item = menu_get_item($active_path)) {
           if (isset($max_depth)) {
             $max_depth = min($max_depth, MENU_MAX_DEPTH);
+          }
           // Generate a cache ID (cid) specific for this page.
           $cid = 'links:' . $menu_name . ':page:' . $item['href'] . ':' . $GLOBALS['language']->language . ':' . (int) $item['access'] . ':' . (int) $max_depth;
           // If we are asked for the active trail only, and $menu_name has not been
           // built and cached for this page yet, then this likely means that it
           // won't be built anymore, as this function is invoked from
           // template_process_page(). So in order to not build a giant menu tree
           // that needs to be checked for access on all levels, we simply check
           // whether we have the menu already in cache, or otherwise, build a minimum
           // tree containing the breadcrumb/active trail only.
           // @see menu_set_active_trail()
           if (!isset($tree[$cid]) && $only_active_trail) {
             $cid .= ':trail';
+          }
           if (!isset($tree[$cid])) {
             // If the static variable doesn't have the data, check {cache_menu}.
             $cache = cache_get($cid, 'cache_menu');
             if ($cache && isset($cache->data)) {
               // If the cache entry exists, it contains the parameters for
               // menu_build_tree().
               $tree_parameters = $cache->data;
+            }
             // If the tree data was not in the cache, build $tree_parameters.
             if (!isset($tree_parameters)) {
               $tree_parameters = array(
                 'min_depth' => 1,
                 'max_depth' => $max_depth,
               );
               // Parent mlids; used both as key and value to ensure uniqueness.
               // We always want all the top-level links with plid == 0.
               $active_trail = array(0 => 0);
               // If the item for the current page is accessible, build the tree
               // parameters accordingly.
               if ($item['access']) {
                 // Find a menu link corresponding to the current path. If $active_path
                 // is NULL, let menu_link_get_preferred() determine the path.
                 if ($active_link = menu_link_get_preferred($active_path, $menu_name)) {
                   // The active link may only be taken into account to build the
                   // active trail, if it resides in the requested menu. Otherwise,
                   // we'd needlessly re-run _menu_build_tree() queries for every menu
                   // on every page.
                   if ($active_link['menu_name'] == $menu_name) {
                     // Use all the coordinates, except the last one because there
                     // can be no child beyond the last column.
                     for ($i = 1; $i < MENU_MAX_DEPTH; $i++) {
                       if ($active_link['p' . $i]) {
                         $active_trail[$active_link['p' . $i]] = $active_link['p' . $i];
+                      }
+                    }
                     // If we are asked to build links for the active trail only, skip
                     // the entire 'expanded' handling.
                     if ($only_active_trail) {
                       $tree_parameters['only_active_trail'] = TRUE;
+                    }
+                  }
+                }
                 $parents = $active_trail;
                 $expanded = variable_get('menu_expanded', array());
                 // Check whether the current menu has any links set to be expanded.
                 if (!$only_active_trail && in_array($menu_name, $expanded)) {
                   // Collect all the links set to be expanded, and then add all of
                   // their children to the list as well.
                   do {
                     $result = db_select('menu_links', NULL, array('fetch' => PDO::FETCH_ASSOC))
                       ->fields('menu_links', array('mlid'))
                       ->condition('menu_name', $menu_name)
                       ->condition('expanded', 1)
                       ->condition('has_children', 1)
                       ->condition('plid', $parents, 'IN')
                       ->condition('mlid', $parents, 'NOT IN')
                       ->execute();
                     $num_rows = FALSE;
                     foreach ($result as $item) {
                       $parents[$item['mlid']] = $item['mlid'];
                       $num_rows = TRUE;
+                    }
                   } while ($num_rows);
+                }
                 $tree_parameters['expanded'] = $parents;
                 $tree_parameters['active_trail'] = $active_trail;
+              }
               // If access is denied, we only show top-level links in menus.
               else {
                 $tree_parameters['expanded'] = $active_trail;
                 $tree_parameters['active_trail'] = $active_trail;
+              }
               // Cache the tree building parameters using the page-specific cid.
               cache_set($cid, $tree_parameters, 'cache_menu');
+            }
             // Build the tree using the parameters; the resulting tree will be cached
             // by _menu_build_tree().
             $tree[$cid] = menu_build_tree($menu_name, $tree_parameters);
+          }
           return $tree[$cid];
+        }
         return array();
+      }
       /**
        * Builds a menu tree, translates links, and checks access.
+       *
        * @param $menu_name
        *   The name of the menu.
        * @param $parameters
        *   (optional) An associative array of build parameters. Possible keys:
        *   - expanded: An array of parent link ids to return only menu links that are
        *     children of one of the plids in this list. If empty, the whole menu tree
        *     is built, unless 'only_active_trail' is TRUE.
        *   - active_trail: An array of mlids, representing the coordinates of the
        *     currently active menu link.
        *   - only_active_trail: Whether to only return links that are in the active
        *     trail. This option is ignored, if 'expanded' is non-empty. Internally
        *     used for breadcrumbs.
        *   - min_depth: The minimum depth of menu links in the resulting tree.
        *     Defaults to 1, which is the default to build a whole tree for a menu
        *     (excluding menu container itself).
        *   - max_depth: The maximum depth of menu links in the resulting tree.
        *   - conditions: An associative array of custom database select query
        *     condition key/value pairs; see _menu_build_tree() for the actual query.
+       *
        * @return
        *   A fully built menu tree.
        */
       function menu_build_tree($menu_name, array $parameters = array()) {
         // Build the menu tree.
         $data = _menu_build_tree($menu_name, $parameters);
         // Check access for the current user to each item in the tree.
         menu_tree_check_access($data['tree'], $data['node_links']);
         return $data['tree'];
+      }
       /**
        * Builds a menu tree.
+       *
        * This function may be used build the data for a menu tree only, for example
        * to further massage the data manually before further processing happens.
        * menu_tree_check_access() needs to be invoked afterwards.
+       *
        * @see menu_build_tree()
        */
       function _menu_build_tree($menu_name, array $parameters = array()) {
         // Static cache of already built menu trees.
         $trees = &drupal_static(__FUNCTION__, array());
         // Build the cache id; sort parents to prevent duplicate storage and remove
         // default parameter values.
         if (isset($parameters['expanded'])) {
           sort($parameters['expanded']);
+        }
         $tree_cid = 'links:' . $menu_name . ':tree-data:' . $GLOBALS['language']->language . ':' . hash('sha256', serialize($parameters));
         // If we do not have this tree in the static cache, check {cache_menu}.
         if (!isset($trees[$tree_cid])) {
           $cache = cache_get($tree_cid, 'cache_menu');
           if ($cache && isset($cache->data)) {
             $trees[$tree_cid] = $cache->data;
+          }
+        }
         if (!isset($trees[$tree_cid])) {
           // Select the links from the table, and recursively build the tree. We
           // LEFT JOIN since there is no match in {menu_router} for an external
           // link.
           $query = db_select('menu_links', 'ml', array('fetch' => PDO::FETCH_ASSOC));
           $query->addTag('translatable');
           $query->leftJoin('menu_router', 'm', 'm.path = ml.router_path');
           $query->fields('ml');
           $query->fields('m', array(
             'load_functions',
             'to_arg_functions',
             'access_callback',
             'access_arguments',
             'page_callback',
             'page_arguments',
             'delivery_callback',
             'tab_parent',
             'tab_root',
             'title',
             'title_callback',
             'title_arguments',
             'theme_callback',
             'theme_arguments',
             'type',
             'description',
           ));
           for ($i = 1; $i <= MENU_MAX_DEPTH; $i++) {
             $query->orderBy('p' . $i, 'ASC');
+          }
           $query->condition('ml.menu_name', $menu_name);
           if (!empty($parameters['expanded'])) {
             $query->condition('ml.plid', $parameters['expanded'], 'IN');
+          }
           elseif (!empty($parameters['only_active_trail'])) {
             $query->condition('ml.mlid', $parameters['active_trail'], 'IN');
+          }
           $min_depth = (isset($parameters['min_depth']) ? $parameters['min_depth'] : 1);
           if ($min_depth != 1) {
             $query->condition('ml.depth', $min_depth, '>=');
+          }
           if (isset($parameters['max_depth'])) {
             $query->condition('ml.depth', $parameters['max_depth'], '<=');
+          }
           // Add custom query conditions, if any were passed.
           if (isset($parameters['conditions'])) {
             foreach ($parameters['conditions'] as $column => $value) {
               $query->condition($column, $value);
+            }
+          }
           // Build an ordered array of links using the query result object.
           $links = array();
           foreach ($query->execute() as $item) {
             $links[] = $item;
+          }
           $active_trail = (isset($parameters['active_trail']) ? $parameters['active_trail'] : array());
           $data['tree'] = menu_tree_data($links, $active_trail, $min_depth);
           $data['node_links'] = array();
           menu_tree_collect_node_links($data['tree'], $data['node_links']);
           // Cache the data, if it is not already in the cache.
           cache_set($tree_cid, $data, 'cache_menu');
           $trees[$tree_cid] = $data;
+        }
         return $trees[$tree_cid];
+      }
       /**
        * Collects node links from a given menu tree recursively.
+       *
        * @param $tree
        *   The menu tree you wish to collect node links from.
        * @param $node_links
        *   An array in which to store the collected node links.
        */
       function menu_tree_collect_node_links(&$tree, &$node_links) {
         foreach ($tree as $key => $v) {
           if ($tree[$key]['link']['router_path'] == 'node/%') {
             $nid = substr($tree[$key]['link']['link_path'], 5);
             if (is_numeric($nid)) {
               $node_links[$nid][$tree[$key]['link']['mlid']] = &$tree[$key]['link'];
               $tree[$key]['link']['access'] = FALSE;
+            }
+          }
           if ($tree[$key]['below']) {
             menu_tree_collect_node_links($tree[$key]['below'], $node_links);
+          }
+        }
+      }
       /**
        * Checks access and performs dynamic operations for each link in the tree.
+       *
        * @param $tree
        *   The menu tree you wish to operate on.
        * @param $node_links
        *   A collection of node link references generated from $tree by
        *   menu_tree_collect_node_links().
        */
       function menu_tree_check_access(&$tree, $node_links = array()) {
         if ($node_links && (user_access('access content') || user_access('bypass node access'))) {
           $nids = array_keys($node_links);
           $select = db_select('node', 'n');
           $select->addField('n', 'nid');
           $select->condition('n.status', 1);
           $select->condition('n.nid', $nids, 'IN');
           $select->addTag('node_access');
           $nids = $select->execute()->fetchCol();
           foreach ($nids as $nid) {
             foreach ($node_links[$nid] as $mlid => $link) {
               $node_links[$nid][$mlid]['access'] = TRUE;
+            }
+          }
+        }
         _menu_tree_check_access($tree);
+      }
       /**
        * Sorts the menu tree and recursively checks access for each item.
        */
       function _menu_tree_check_access(&$tree) {
         $new_tree = array();
         foreach ($tree as $key => $v) {
           $item = &$tree[$key]['link'];
           _menu_link_translate($item);
           if ($item['access'] || ($item['in_active_trail'] && strpos($item['href'], '%') !== FALSE)) {
             if ($tree[$key]['below']) {
               _menu_tree_check_access($tree[$key]['below']);
+            }
             // The weights are made a uniform 5 digits by adding 50000 as an offset.
             // After _menu_link_translate(), $item['title'] has the localized link title.
             // Adding the mlid to the end of the index insures that it is unique.
             $new_tree[(50000 + $item['weight']) . ' ' . $item['title'] . ' ' . $item['mlid']] = $tree[$key];
+          }
+        }
         // Sort siblings in the tree based on the weights and localized titles.
         ksort($new_tree);
         $tree = $new_tree;
+      }
       /**
        * Sorts and returns the built data representing a menu tree.
+       *
        * @param $links
        *   A flat array of menu links that are part of the menu. Each array element
        *   is an associative array of information about the menu link, containing the
        *   fields from the {menu_links} table, and optionally additional information
        *   from the {menu_router} table, if the menu item appears in both tables.
        *   This array must be ordered depth-first. See _menu_build_tree() for a sample
        *   query.
        * @param $parents
        *   An array of the menu link ID values that are in the path from the current
        *   page to the root of the menu tree.
        * @param $depth
        *   The minimum depth to include in the returned menu tree.
+       *
        * @return
        *   An array of menu links in the form of a tree. Each item in the tree is an
        *   associative array containing:
        *   - link: The menu link item from $links, with additional element
        *     'in_active_trail' (TRUE if the link ID was in $parents).
        *   - below: An array containing the sub-tree of this item, where each element
        *     is a tree item array with 'link' and 'below' elements. This array will be
        *     empty if the menu item has no items in its sub-tree having a depth
        *     greater than or equal to $depth.
        */
       function menu_tree_data(array $links, array $parents = array(), $depth = 1) {
         // Reverse the array so we can use the more efficient array_pop() function.
         $links = array_reverse($links);
         return _menu_tree_data($links, $parents, $depth);
+      }
       /**
        * Builds the data representing a menu tree.
+       *
        * The function is a bit complex because the rendering of a link depends on
        * the next menu link.
        */
       function _menu_tree_data(&$links, $parents, $depth) {
         $tree = array();
         while ($item = array_pop($links)) {
           // We need to determine if we're on the path to root so we can later build
           // the correct active trail and breadcrumb.
           $item['in_active_trail'] = in_array($item['mlid'], $parents);
           // Add the current link to the tree.
           $tree[$item['mlid']] = array(
             'link' => $item,
             'below' => array(),
           );
           // Look ahead to the next link, but leave it on the array so it's available
           // to other recursive function calls if we return or build a sub-tree.
           $next = end($links);
           // Check whether the next link is the first in a new sub-tree.
           if ($next && $next['depth'] > $depth) {
             // Recursively call _menu_tree_data to build the sub-tree.
             $tree[$item['mlid']]['below'] = _menu_tree_data($links, $parents, $next['depth']);
             // Fetch next link after filling the sub-tree.
             $next = end($links);
+          }
           // Determine if we should exit the loop and return.
           if (!$next || $next['depth'] < $depth) {
             break;
+          }
+        }
         return $tree;
+      }
       /**
        * Implements template_preprocess_HOOK() for theme_menu_tree().
        */
       function template_preprocess_menu_tree(&$variables) {
         $variables['#tree'] = $variables['tree'];
         $variables['tree'] = $variables['tree']['#children'];
+      }
       /**
        * Returns HTML for a wrapper for a menu sub-tree.
+       *
        * @param $variables
        *   An associative array containing:
        *   - tree: An HTML string containing the tree's items.
+       *
        * @see template_preprocess_menu_tree()
        * @ingroup themeable
        */
       function theme_menu_tree($variables) {
         return '<ul class="menu">' . $variables['tree'] . '</ul>';
+      }
       /**
        * Returns HTML for a menu link and submenu.
+       *
        * @param $variables
        *   An associative array containing:
        *   - element: Structured array data for a menu link.
+       *
        * @ingroup themeable
        */
       function theme_menu_link(array $variables) {
         $element = $variables['element'];
         $sub_menu = '';
         if ($element['#below']) {
           $sub_menu = drupal_render($element['#below']);
+        }
         $output = l($element['#title'], $element['#href'], $element['#localized_options']);
         return '<li' . drupal_attributes($element['#attributes']) . '>' . $output . $sub_menu . "</li>\n";
+      }
       /**
        * Returns HTML for a single local task link.
+       *
        * @param $variables
        *   An associative array containing:
        *   - element: A render element containing:
        *     - #link: A menu link array with 'title', 'href', and 'localized_options'
        *       keys.
        *     - #active: A boolean indicating whether the local task is active.
+       *
        * @ingroup themeable
        */
       function theme_menu_local_task($variables) {
         $link = $variables['element']['#link'];
         $link_text = $link['title'];
         if (!empty($variables['element']['#active'])) {
           // Add text to indicate active tab for non-visual users.
           $active = '<span class="element-invisible">' . t('(active tab)') . '</span>';
           // If the link does not contain HTML already, check_plain() it now.
           // After we set 'html'=TRUE the link will not be sanitized by l().
           if (empty($link['localized_options']['html'])) {
             $link['title'] = check_plain($link['title']);
+          }
           $link['localized_options']['html'] = TRUE;
           $link_text = t('!local-task-title!active', array('!local-task-title' => $link['title'], '!active' => $active));
+        }
         return '<li' . (!empty($variables['element']['#active']) ? ' class="active"' : '') . '>' . l($link_text, $link['href'], $link['localized_options']) . "</li>\n";
+      }
       /**
        * Returns HTML for a single local action link.
+       *
        * @param $variables
        *   An associative array containing:
        *   - element: A render element containing:
        *     - #link: A menu link array with 'title', 'href', and 'localized_options'
        *       keys.
+       *
        * @ingroup themeable
        */
       function theme_menu_local_action($variables) {
         $link = $variables['element']['#link'];
         $output = '<li>';
         if (isset($link['href'])) {
           $output .= l($link['title'], $link['href'], isset($link['localized_options']) ? $link['localized_options'] : array());
+        }
         elseif (!empty($link['localized_options']['html'])) {
           $output .= $link['title'];
+        }
         else {
           $output .= check_plain($link['title']);
+        }
         $output .= "</li>\n";
         return $output;
+      }
       /**
        * Generates elements for the $arg array in the help hook.
        */
       function drupal_help_arg($arg = array()) {
         // Note - the number of empty elements should be > MENU_MAX_PARTS.
         return $arg + array('', '', '', '', '', '', '', '', '', '', '', '');
+      }
       /**
        * Returns the help associated with the active menu item.
        */
       function menu_get_active_help() {
         $output = '';
         $router_path = menu_tab_root_path();
         // We will always have a path unless we are on a 403 or 404.
         if (!$router_path) {
           return '';
+        }
         $arg = drupal_help_arg(arg(NULL));
         foreach (module_implements('help') as $module) {
           $function = $module . '_help';
           // Lookup help for this path.
           if ($help = $function($router_path, $arg)) {
             $output .= $help . "\n";
+          }
+        }
         return $output;
+      }
       /**
        * Gets the custom theme for the current page, if there is one.
+       *
        * @param $initialize
        *   This parameter should only be used internally; it is set to TRUE in order
        *   to force the custom theme to be initialized for the current page request.
+       *
        * @return
        *   The machine-readable name of the custom theme, if there is one.
+       *
        * @see menu_set_custom_theme()
        */
       function menu_get_custom_theme($initialize = FALSE) {
         $custom_theme = &drupal_static(__FUNCTION__);
         // Skip this if the site is offline or being installed or updated, since the
         // menu system may not be correctly initialized then.
         if ($initialize && !_menu_site_is_offline(TRUE) && (!defined('MAINTENANCE_MODE') || (MAINTENANCE_MODE != 'update' && MAINTENANCE_MODE != 'install'))) {
           // First allow modules to dynamically set a custom theme for the current
           // page. Since we can only have one, the last module to return a valid
           // theme takes precedence.
           $custom_themes = array_filter(module_invoke_all('custom_theme'), 'drupal_theme_access');
           if (!empty($custom_themes)) {
             $custom_theme = array_pop($custom_themes);
+          }
           // If there is a theme callback function for the current page, execute it.
           // If this returns a valid theme, it will override any theme that was set
           // by a hook_custom_theme() implementation above.
           $router_item = menu_get_item();
           if (!empty($router_item['access']) && !empty($router_item['theme_callback']) && function_exists($router_item['theme_callback'])) {
             $theme_name = call_user_func_array($router_item['theme_callback'], $router_item['theme_arguments']);
             if (drupal_theme_access($theme_name)) {
               $custom_theme = $theme_name;
+            }
+          }
+        }
         return $custom_theme;
+      }
       /**
        * Sets a custom theme for the current page, if there is one.
        */
       function menu_set_custom_theme() {
         menu_get_custom_theme(TRUE);
+      }
       /**
        * Build a list of named menus.
        */
       function menu_get_names() {
         $names = &drupal_static(__FUNCTION__);
         if (empty($names)) {
           $names = db_select('menu_links')
             ->distinct()
             ->fields('menu_links', array('menu_name'))
             ->orderBy('menu_name')
             ->execute()->fetchCol();
+        }
         return $names;
+      }
       /**
        * Returns an array containing the names of system-defined (default) menus.
        */
       function menu_list_system_menus() {
         return array(
           'navigation' => 'Navigation',
           'management' => 'Management',
           'user-menu' => 'User menu',
           'main-menu' => 'Main menu',
         );
+      }
       /**
        * Returns an array of links to be rendered as the Main menu.
        */
       function menu_main_menu() {
         return menu_navigation_links(variable_get('menu_main_links_source', 'main-menu'));
+      }
       /**
        * Returns an array of links to be rendered as the Secondary links.
        */
       function menu_secondary_menu() {
         // If the secondary menu source is set as the primary menu, we display the
         // second level of the primary menu.
         if (variable_get('menu_secondary_links_source', 'user-menu') == variable_get('menu_main_links_source', 'main-menu')) {
           return menu_navigation_links(variable_get('menu_main_links_source', 'main-menu'), 1);
+        }
         else {
           return menu_navigation_links(variable_get('menu_secondary_links_source', 'user-menu'), 0);
+        }
+      }
       /**
        * Returns an array of links for a navigation menu.
+       *
        * @param $menu_name
        *   The name of the menu.
        * @param $level
        *   Optional, the depth of the menu to be returned.
+       *
        * @return
        *   An array of links of the specified menu and level.
        */
       function menu_navigation_links($menu_name, $level = 0) {
         // Don't even bother querying the menu table if no menu is specified.
         if (empty($menu_name)) {
           return array();
+        }
         // Get the menu hierarchy for the current page.
         $tree = menu_tree_page_data($menu_name, $level + 1);
         // Go down the active trail until the right level is reached.
         while ($level-- > 0 && $tree) {
           // Loop through the current level's items until we find one that is in trail.
           while ($item = array_shift($tree)) {
             if ($item['link']['in_active_trail']) {
               // If the item is in the active trail, we continue in the subtree.
               $tree = empty($item['below']) ? array() : $item['below'];
               break;
+            }
+          }
+        }
         // Create a single level of links.
         $router_item = menu_get_item();
         $links = array();
         foreach ($tree as $item) {
           if (!$item['link']['hidden']) {
             $class = '';
             $l = $item['link']['localized_options'];
             $l['href'] = $item['link']['href'];
             $l['title'] = $item['link']['title'];
             if ($item['link']['in_active_trail']) {
               $class = ' active-trail';
               $l['attributes']['class'][] = 'active-trail';
+            }
             // Normally, l() compares the href of every link with $_GET['q'] and sets
             // the active class accordingly. But local tasks do not appear in menu
             // trees, so if the current path is a local task, and this link is its
             // tab root, then we have to set the class manually.
             if ($item['link']['href'] == $router_item['tab_root_href'] && $item['link']['href'] != $_GET['q']) {
               $l['attributes']['class'][] = 'active';
+            }
             // Keyed with the unique mlid to generate classes in theme_links().
             $links['menu-' . $item['link']['mlid'] . $class] = $l;
+          }
+        }
         return $links;
+      }
       /**
        * Collects the local tasks (tabs), action links, and the root path.
+       *
        * @param $level
        *   The level of tasks you ask for. Primary tasks are 0, secondary are 1.
+       *
        * @return
        *   An array containing
        *   - tabs: Local tasks for the requested level:
        *     - count: The number of local tasks.
        *     - output: The themed output of local tasks.
        *   - actions: Action links for the requested level:
        *     - count: The number of action links.
        *     - output: The themed output of action links.
        *   - root_path: The router path for the current page. If the current page is
        *     a default local task, then this corresponds to the parent tab.
        */
       function menu_local_tasks($level = 0) {
         $data = &drupal_static(__FUNCTION__);
         $root_path = &drupal_static(__FUNCTION__ . ':root_path', '');
         $empty = array(
           'tabs' => array('count' => 0, 'output' => array()),
           'actions' => array('count' => 0, 'output' => array()),
           'root_path' => &$root_path,
         );
         if (!isset($data)) {
           $data = array();
           // Set defaults in case there are no actions or tabs.
           $actions = $empty['actions'];
           $tabs = array();
           $router_item = menu_get_item();
           // If this router item points to its parent, start from the parents to
           // compute tabs and actions.
           if ($router_item && ($router_item['type'] & MENU_LINKS_TO_PARENT)) {
             $router_item = menu_get_item($router_item['tab_parent_href']);
+          }
           // If we failed to fetch a router item or the current user doesn't have
           // access to it, don't bother computing the tabs.
           if (!$router_item || !$router_item['access']) {
             return $empty;
+          }
           // Get all tabs (also known as local tasks) and the root page.
           $cid = 'local_tasks:' . $router_item['tab_root'];
           if ($cache = cache_get($cid, 'cache_menu')) {
             $result = $cache->data;
+          }
           else {
             $result = db_select('menu_router', NULL, array('fetch' => PDO::FETCH_ASSOC))
               ->fields('menu_router')
               ->condition('tab_root', $router_item['tab_root'])
               ->condition('context', MENU_CONTEXT_INLINE, '<>')
               ->orderBy('weight')
               ->orderBy('title')
               ->execute()
               ->fetchAll();
             cache_set($cid, $result, 'cache_menu');
+          }
           $map = $router_item['original_map'];
           $children = array();
           $tasks = array();
           $root_path = $router_item['path'];
           foreach ($result as $item) {
             _menu_translate($item, $map, TRUE);
             if ($item['tab_parent']) {
               // All tabs, but not the root page.
               $children[$item['tab_parent']][$item['path']] = $item;
+            }
             // Store the translated item for later use.
             $tasks[$item['path']] = $item;
+          }
           // Find all tabs below the current path.
           $path = $router_item['path'];
           // Tab parenting may skip levels, so the number of parts in the path may not
           // equal the depth. Thus we use the $depth counter (offset by 1000 for ksort).
           $depth = 1001;
           $actions['count'] = 0;
           $actions['output'] = array();
           while (isset($children[$path])) {
             $tabs_current = array();
             $actions_current = array();
             $next_path = '';
             $tab_count = 0;
             $action_count = 0;
             foreach ($children[$path] as $item) {
               // Local tasks can be normal items too, so bitmask with
               // MENU_IS_LOCAL_TASK before checking.
               if (!($item['type'] & MENU_IS_LOCAL_TASK)) {
                 // This item is not a tab, skip it.
                 continue;
+              }
               if ($item['access']) {
                 $link = $item;
                 // The default task is always active. As tabs can be normal items
                 // too, so bitmask with MENU_LINKS_TO_PARENT before checking.
                 if (($item['type'] & MENU_LINKS_TO_PARENT) == MENU_LINKS_TO_PARENT) {
                   // Find the first parent which is not a default local task or action.
                   for ($p = $item['tab_parent']; ($tasks[$p]['type'] & MENU_LINKS_TO_PARENT) == MENU_LINKS_TO_PARENT; $p = $tasks[$p]['tab_parent']);
                   // Use the path of the parent instead.
                   $link['href'] = $tasks[$p]['href'];
                   // Mark the link as active, if the current path happens to be the
                   // path of the default local task itself (i.e., instead of its
                   // tab_parent_href or tab_root_href). Normally, links for default
                   // local tasks link to their parent, but the path of default local
                   // tasks can still be accessed directly, in which case this link
                   // would not be marked as active, since l() only compares the href
                   // with $_GET['q'].
                   if ($link['href'] != $_GET['q']) {
                     $link['localized_options']['attributes']['class'][] = 'active';
+                  }
                   $tabs_current[] = array(
                     '#theme' => 'menu_local_task',
                     '#link' => $link,
                     '#active' => TRUE,
                   );
                   $next_path = $item['path'];
                   $tab_count++;
+                }
                 else {
                   // Actions can be normal items too, so bitmask with
                   // MENU_IS_LOCAL_ACTION before checking.
                   if (($item['type'] & MENU_IS_LOCAL_ACTION) == MENU_IS_LOCAL_ACTION) {
                     // The item is an action, display it as such.
                     $actions_current[] = array(
                       '#theme' => 'menu_local_action',
                       '#link' => $link,
                     );
                     $action_count++;
+                  }
                   else {
                     // Otherwise, it's a normal tab.
                     $tabs_current[] = array(
                       '#theme' => 'menu_local_task',
                       '#link' => $link,
                     );
                     $tab_count++;
+                  }
+                }
+              }
+            }
             $path = $next_path;
             $tabs[$depth]['count'] = $tab_count;
             $tabs[$depth]['output'] = $tabs_current;
             $actions['count'] += $action_count;
             $actions['output'] = array_merge($actions['output'], $actions_current);
             $depth++;
+          }
           $data['actions'] = $actions;
           // Find all tabs at the same level or above the current one.
           $parent = $router_item['tab_parent'];
           $path = $router_item['path'];
           $current = $router_item;
           $depth = 1000;
           while (isset($children[$parent])) {
             $tabs_current = array();
             $next_path = '';
             $next_parent = '';
             $count = 0;
             foreach ($children[$parent] as $item) {
               // Skip local actions.
               if ($item['type'] & MENU_IS_LOCAL_ACTION) {
                 continue;
+              }
               if ($item['access']) {
                 $count++;
                 $link = $item;
                 // Local tasks can be normal items too, so bitmask with
                 // MENU_LINKS_TO_PARENT before checking.
                 if (($item['type'] & MENU_LINKS_TO_PARENT) == MENU_LINKS_TO_PARENT) {
                   // Find the first parent which is not a default local task.
                   for ($p = $item['tab_parent']; ($tasks[$p]['type'] & MENU_LINKS_TO_PARENT) == MENU_LINKS_TO_PARENT; $p = $tasks[$p]['tab_parent']);
                   // Use the path of the parent instead.
                   $link['href'] = $tasks[$p]['href'];
                   if ($item['path'] == $router_item['path']) {
                     $root_path = $tasks[$p]['path'];
+                  }
+                }
                 // We check for the active tab.
                 if ($item['path'] == $path) {
                   // Mark the link as active, if the current path is a (second-level)
                   // local task of a default local task. Since this default local task
                   // links to its parent, l() will not mark it as active, as it only
                   // compares the link's href to $_GET['q'].
                   if ($link['href'] != $_GET['q']) {
                     $link['localized_options']['attributes']['class'][] = 'active';
+                  }
                   $tabs_current[] = array(
                     '#theme' => 'menu_local_task',
                     '#link' => $link,
                     '#active' => TRUE,
                   );
                   $next_path = $item['tab_parent'];
                   if (isset($tasks[$next_path])) {
                     $next_parent = $tasks[$next_path]['tab_parent'];
+                  }
+                }
                 else {
                   $tabs_current[] = array(
                     '#theme' => 'menu_local_task',
                     '#link' => $link,
                   );
+                }
+              }
+            }
             $path = $next_path;
             $parent = $next_parent;
             $tabs[$depth]['count'] = $count;
             $tabs[$depth]['output'] = $tabs_current;
             $depth--;
+          }
           // Sort by depth.
           ksort($tabs);
           // Remove the depth, we are interested only in their relative placement.
           $tabs = array_values($tabs);
           $data['tabs'] = $tabs;
           // Allow modules to alter local tasks or dynamically append further tasks.
           drupal_alter('menu_local_tasks', $data, $router_item, $root_path);
+        }
         if (isset($data['tabs'][$level])) {
           return array(
             'tabs' => $data['tabs'][$level],
             'actions' => $data['actions'],
             'root_path' => $root_path,
           );
+        }
         // @todo If there are no tabs, then there still can be actions; for example,
         //   when added via hook_menu_local_tasks_alter().
         elseif (!empty($data['actions']['output'])) {
           return array('actions' => $data['actions']) + $empty;
+        }
         return $empty;
+      }
       /**
        * Retrieves contextual links for a path based on registered local tasks.
+       *
        * This leverages the menu system to retrieve the first layer of registered
        * local tasks for a given system path. All local tasks of the tab type
        * MENU_CONTEXT_INLINE are taken into account.
+       *
        * For example, when considering the following registered local tasks:
        * - node/%node/view (default local task) with no 'context' defined
        * - node/%node/edit with context: MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE
        * - node/%node/revisions with context: MENU_CONTEXT_PAGE
        * - node/%node/report-as-spam with context: MENU_CONTEXT_INLINE
+       *
        * If the path "node/123" is passed to this function, then it will return the
        * links for 'edit' and 'report-as-spam'.
+       *
        * @param $module
        *   The name of the implementing module. This is used to prefix the key for
        *   each contextual link, which is transformed into a CSS class during
        *   rendering by theme_links(). For example, if $module is 'block' and the
        *   retrieved local task path argument is 'edit', then the resulting CSS class
        *   will be 'block-edit'.
        * @param $parent_path
        *   The static menu router path of the object to retrieve local tasks for, for
        *   example 'node' or 'admin/structure/block/manage'.
        * @param $args
        *   A list of dynamic path arguments to append to $parent_path to form the
        *   fully-qualified menu router path; for example, array(123) for a certain
        *   node or array('system', 'navigation') for a certain block.
+       *
        * @return
        *   A list of menu router items that are local tasks for the passed-in path.
+       *
        * @see contextual_links_preprocess()
        * @see hook_menu()
        */
       function menu_contextual_links($module, $parent_path, $args) {
         static $path_empty = array();
         $links = array();
         // Performance: In case a previous invocation for the same parent path did not
         // return any links, we immediately return here.
         if (isset($path_empty[$parent_path]) && strpos($parent_path, '%') !== FALSE) {
           return $links;
+        }
         // Construct the item-specific parent path.
         $path = $parent_path . '/' . implode('/', $args);
         // Get the router item for the given parent link path.
         $router_item = menu_get_item($path);
         if (!$router_item || !$router_item['access']) {
           $path_empty[$parent_path] = TRUE;
           return $links;
+        }
         $data = &drupal_static(__FUNCTION__, array());
         $root_path = $router_item['path'];
         // Performance: For a single, normalized path (such as 'node/%') we only query
         // available tasks once per request.
         if (!isset($data[$root_path])) {
           // Get all contextual links that are direct children of the router item and
           // not of the tab type 'view'.
           $data[$root_path] = db_select('menu_router', 'm')
             ->fields('m')
             ->condition('tab_parent', $router_item['tab_root'])
             ->condition('context', MENU_CONTEXT_NONE, '<>')
             ->condition('context', MENU_CONTEXT_PAGE, '<>')
             ->orderBy('weight')
             ->orderBy('title')
             ->execute()
             ->fetchAllAssoc('path', PDO::FETCH_ASSOC);
+        }
         $parent_length = drupal_strlen($root_path) + 1;
         $map = $router_item['original_map'];
         foreach ($data[$root_path] as $item) {
           // Extract the actual "task" string from the path argument.
           $key = drupal_substr($item['path'], $parent_length);
           // Denormalize and translate the contextual link.
           _menu_translate($item, $map, TRUE);
           if (!$item['access']) {
             continue;
+          }
           // All contextual links are keyed by the actual "task" path argument,
           // prefixed with the name of the implementing module.
           $links[$module . '-' . $key] = $item;
+        }
         // Allow modules to alter contextual links.
         drupal_alter('menu_contextual_links', $links, $router_item, $root_path);
         // Performance: If the current user does not have access to any links for this
         // router path and no other module added further links, we assign FALSE here
         // to skip the entire process the next time the same router path is requested.
         if (empty($links)) {
           $path_empty[$parent_path] = TRUE;
+        }
         return $links;
+      }
       /**
        * Returns the rendered local tasks at the top level.
        */
       function menu_primary_local_tasks() {
         $links = menu_local_tasks(0);
         // Do not display single tabs.
         return ($links['tabs']['count'] > 1 ? $links['tabs']['output'] : '');
+      }
       /**
        * Returns the rendered local tasks at the second level.
        */
       function menu_secondary_local_tasks() {
         $links = menu_local_tasks(1);
         // Do not display single tabs.
         return ($links['tabs']['count'] > 1 ? $links['tabs']['output'] : '');
+      }
       /**
        * Returns the rendered local actions at the current level.
        */
       function menu_local_actions() {
         $links = menu_local_tasks();
         return $links['actions']['output'];
+      }
       /**
        * Returns the router path, or the path for a default local task's parent.
        */
       function menu_tab_root_path() {
         $links = menu_local_tasks();
         return $links['root_path'];
+      }
       /**
        * Returns a renderable element for the primary and secondary tabs.
        */
       function menu_local_tabs() {
         return array(
           '#theme' => 'menu_local_tasks',
           '#primary' => menu_primary_local_tasks(),
           '#secondary' => menu_secondary_local_tasks(),
         );
+      }
       /**
        * Returns HTML for primary and secondary local tasks.
+       *
        * @param $variables
        *   An associative array containing:
        *     - primary: (optional) An array of local tasks (tabs).
        *     - secondary: (optional) An array of local tasks (tabs).
+       *
        * @ingroup themeable
        * @see menu_local_tasks()
        */
       function theme_menu_local_tasks(&$variables) {
         $output = '';
         if (!empty($variables['primary'])) {
           $variables['primary']['#prefix'] = '<h2 class="element-invisible">' . t('Primary tabs') . '</h2>';
           $variables['primary']['#prefix'] .= '<ul class="tabs primary">';
           $variables['primary']['#suffix'] = '</ul>';
           $output .= drupal_render($variables['primary']);
+        }
         if (!empty($variables['secondary'])) {
           $variables['secondary']['#prefix'] = '<h2 class="element-invisible">' . t('Secondary tabs') . '</h2>';
           $variables['secondary']['#prefix'] .= '<ul class="tabs secondary">';
           $variables['secondary']['#suffix'] = '</ul>';
           $output .= drupal_render($variables['secondary']);
+        }
         return $output;
+      }
       /**
        * Sets (or gets) the active menu for the current page.
+       *
        * The active menu for the page determines the active trail.
+       *
        * @return
        *   An array of menu machine names, in order of preference. The
        *   'menu_default_active_menus' variable may be used to assert a menu order
        *   different from the order of creation, or to prevent a particular menu from
        *   being used at all in the active trail.
        *   E.g., $conf['menu_default_active_menus'] = array('navigation', 'main-menu')
        */
       function menu_set_active_menu_names($menu_names = NULL) {
         $active = &drupal_static(__FUNCTION__);
         if (isset($menu_names) && is_array($menu_names)) {
           $active = $menu_names;
+        }
         elseif (!isset($active)) {
           $active = variable_get('menu_default_active_menus', array_keys(menu_list_system_menus()));
+        }
         return $active;
+      }
       /**
        * Gets the active menu for the current page.
        */
       function menu_get_active_menu_names() {
         return menu_set_active_menu_names();
+      }
       /**
        * Sets the active path, which determines which page is loaded.
+       *
        * Note that this may not have the desired effect unless invoked very early
        * in the page load, such as during hook_boot(), or unless you call
        * menu_execute_active_handler() to generate your page output.
+       *
        * @param $path
        *   A Drupal path - not a path alias.
        */
       function menu_set_active_item($path) {
         $_GET['q'] = $path;
         // Since the active item has changed, the active menu trail may also be out
         // of date.
         drupal_static_reset('menu_set_active_trail');
+      }
       /**
        * Sets the active trail (path to the menu tree root) of the current page.
+       *
        * Any trail set by this function will only be used for functionality that calls
        * menu_get_active_trail(). Drupal core only uses trails set here for
        * breadcrumbs and the page title and not for menu trees or page content.
        * Additionally, breadcrumbs set by drupal_set_breadcrumb() will override any
        * trail set here.
+       *
        * To affect the trail used by menu trees, use menu_tree_set_path(). To affect
        * the page content, use menu_set_active_item() instead.
+       *
        * @param $new_trail
        *   Menu trail to set; the value is saved in a static variable and can be
        *   retrieved by menu_get_active_trail(). The format of this array should be
        *   the same as the return value of menu_get_active_trail().
+       *
        * @return
        *   The active trail. See menu_get_active_trail() for details.
        */
       function menu_set_active_trail($new_trail = NULL) {
         $trail = &drupal_static(__FUNCTION__);
         if (isset($new_trail)) {
           $trail = $new_trail;
+        }
         elseif (!isset($trail)) {
           $trail = array();
           $trail[] = array(
             'title' => t('Home'),
             'href' => '<front>',
             'link_path' => '',
             'localized_options' => array(),
             'type' => 0,
           );
           // Try to retrieve a menu link corresponding to the current path. If more
           // than one exists, the link from the most preferred menu is returned.
           $preferred_link = menu_link_get_preferred();
           $current_item = menu_get_item();
           // There is a link for the current path.
           if ($preferred_link) {
             // Pass TRUE for $only_active_trail to make menu_tree_page_data() build
             // a stripped down menu tree containing the active trail only, in case
             // the given menu has not been built in this request yet.
             $tree = menu_tree_page_data($preferred_link['menu_name'], NULL, TRUE);
             $curr = current($tree);
             next($tree);
+          }
           // There is no link for the current path.
           else {
             $preferred_link = $current_item;
             $curr = FALSE;
+          }
           while ($curr) {
             $link = $curr['link'];
             if ($link['in_active_trail']) {
               // Add the link to the trail, unless it links to its parent.
               if (!($link['type'] & MENU_LINKS_TO_PARENT)) {
                 // The menu tree for the active trail may contain additional links
                 // that have not been translated yet, since they contain dynamic
                 // argument placeholders (%). Such links are not contained in regular
                 // menu trees, and have only been loaded for the additional
                 // translation that happens here, so as to be able to display them in
                 // the breadcrumb for the current page.
                 // @see _menu_tree_check_access()
                 // @see _menu_link_translate()
                 if (strpos($link['href'], '%') !== FALSE) {
                   _menu_link_translate($link, TRUE);
+                }
                 if ($link['access']) {
                   $trail[] = $link;
+                }
+              }
               $tree = $curr['below'] ? $curr['below'] : array();
+            }
             $curr = current($tree);
             next($tree);
+          }
           // Make sure the current page is in the trail to build the page title, by
           // appending either the preferred link or the menu router item for the
           // current page. Exclude it if we are on the front page.
           $last = end($trail);
           if ($preferred_link && $last['href'] != $preferred_link['href'] && !drupal_is_front_page()) {
             $trail[] = $preferred_link;
+          }
+        }
         return $trail;
+      }
       /**
        * Looks up the preferred menu link for a given system path.
+       *
        * @param $path
        *   The path; for example, 'node/5'. The function will find the corresponding
        *   menu link ('node/5' if it exists, or fallback to 'node/%').
        * @param $selected_menu
        *   The name of a menu used to restrict the search for a preferred menu link.
        *   If not specified, all the menus returned by menu_get_active_menu_names()
        *   will be used.
+       *
        * @return
        *   A fully translated menu link, or FALSE if no matching menu link was
        *   found. The most specific menu link ('node/5' preferred over 'node/%') in
        *   the most preferred menu (as defined by menu_get_active_menu_names()) is
        *   returned.
        */
       function menu_link_get_preferred($path = NULL, $selected_menu = NULL) {
         $preferred_links = &drupal_static(__FUNCTION__);
         if (!isset($path)) {
           $path = $_GET['q'];
+        }
         if (empty($selected_menu)) {
           // Use an illegal menu name as the key for the preferred menu link.
           $selected_menu = MENU_PREFERRED_LINK;
+        }
         if (!isset($preferred_links[$path])) {
           // Look for the correct menu link by building a list of candidate paths,
           // which are ordered by priority (translated hrefs are preferred over
           // untranslated paths). Afterwards, the most relevant path is picked from
           // the menus, ordered by menu preference.
           $item = menu_get_item($path);
           if ($item === FALSE) {
             return FALSE;
+          }
           $path_candidates = array();
           // 1. The current item href.
           $path_candidates[$item['href']] = $item['href'];
           // 2. The tab root href of the current item (if any).
           if ($item['tab_parent'] && ($tab_root = menu_get_item($item['tab_root_href']))) {
             $path_candidates[$tab_root['href']] = $tab_root['href'];
+          }
           // 3. The current item path (with wildcards).
           $path_candidates[$item['path']] = $item['path'];
           // 4. The tab root path of the current item (if any).
           if (!empty($tab_root)) {
             $path_candidates[$tab_root['path']] = $tab_root['path'];
+          }
           // Retrieve a list of menu names, ordered by preference.
           $menu_names = menu_get_active_menu_names();
           // Put the selected menu at the front of the list.
           array_unshift($menu_names, $selected_menu);
           $query = db_select('menu_links', 'ml', array('fetch' => PDO::FETCH_ASSOC));
           $query->leftJoin('menu_router', 'm', 'm.path = ml.router_path');
           $query->fields('ml');
           // Weight must be taken from {menu_links}, not {menu_router}.
           $query->addField('ml', 'weight', 'link_weight');
           $query->fields('m');
           $query->condition('ml.link_path', $path_candidates, 'IN');
           $query->addTag('preferred_menu_links');
           // Sort candidates by link path and menu name.
           $candidates = array();
           foreach ($query->execute() as $candidate) {
             $candidate['weight'] = $candidate['link_weight'];
             $candidates[$candidate['link_path']][$candidate['menu_name']] = $candidate;
             // Add any menus not already in the menu name search list.
             if (!in_array($candidate['menu_name'], $menu_names)) {
               $menu_names[] = $candidate['menu_name'];
+            }
+          }
           // Store the most specific link for each menu. Also save the most specific
           // link of the most preferred menu in $preferred_link.
           foreach ($path_candidates as $link_path) {
             if (isset($candidates[$link_path])) {
               foreach ($menu_names as $menu_name) {
                 if (empty($preferred_links[$path][$menu_name]) && isset($candidates[$link_path][$menu_name])) {
                   $candidate_item = $candidates[$link_path][$menu_name];
                   $map = explode('/', $path);
                   _menu_translate($candidate_item, $map);
                   if ($candidate_item['access']) {
                     $preferred_links[$path][$menu_name] = $candidate_item;
                     if (empty($preferred_links[$path][MENU_PREFERRED_LINK])) {
                       // Store the most specific link.
                       $preferred_links[$path][MENU_PREFERRED_LINK] = $candidate_item;
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
         return isset($preferred_links[$path][$selected_menu]) ? $preferred_links[$path][$selected_menu] : FALSE;
+      }
       /**
        * Gets the active trail (path to root menu root) of the current page.
+       *
        * If a trail is supplied to menu_set_active_trail(), that value is returned. If
        * a trail is not supplied to menu_set_active_trail(), the path to the current
        * page is calculated and returned. The calculated trail is also saved as a
        * static value for use by subsequent calls to menu_get_active_trail().
+       *
        * @return
        *   Path to menu root of the current page, as an array of menu link items,
        *   starting with the site's home page. Each link item is an associative array
        *   with the following components:
        *   - title: Title of the item.
        *   - href: Drupal path of the item.
        *   - localized_options: Options for passing into the l() function.
        *   - type: A menu type constant, such as MENU_DEFAULT_LOCAL_TASK, or 0 to
        *     indicate it's not really in the menu (used for the home page item).
        */
       function menu_get_active_trail() {
         return menu_set_active_trail();
+      }
       /**
        * Gets the breadcrumb for the current page, as determined by the active trail.
+       *
        * @see menu_set_active_trail()
        */
       function menu_get_active_breadcrumb() {
         $breadcrumb = array();
         // No breadcrumb for the front page.
         if (drupal_is_front_page()) {
           return $breadcrumb;
+        }
         $item = menu_get_item();
         if (!empty($item['access'])) {
           $active_trail = menu_get_active_trail();
           // Allow modules to alter the breadcrumb, if possible, as that is much
           // faster than rebuilding an entirely new active trail.
           drupal_alter('menu_breadcrumb', $active_trail, $item);
           // Don't show a link to the current page in the breadcrumb trail.
           $end = end($active_trail);
           if ($item['href'] == $end['href']) {
             array_pop($active_trail);
+          }
           // Remove the tab root (parent) if the current path links to its parent.
           // Normally, the tab root link is included in the breadcrumb, as soon as we
           // are on a local task or any other child link. However, if we are on a
           // default local task (e.g., node/%/view), then we do not want the tab root
           // link (e.g., node/%) to appear, as it would be identical to the current
           // page. Since this behavior also needs to work recursively (i.e., on
           // default local tasks of default local tasks), and since the last non-task
           // link in the trail is used as page title (see menu_get_active_title()),
           // this condition cannot be cleanly integrated into menu_get_active_trail().
           // menu_get_active_trail() already skips all links that link to their parent
           // (commonly MENU_DEFAULT_LOCAL_TASK). In order to also hide the parent link
           // itself, we always remove the last link in the trail, if the current
           // router item links to its parent.
           if (($item['type'] & MENU_LINKS_TO_PARENT) == MENU_LINKS_TO_PARENT) {
             array_pop($active_trail);
+          }
           foreach ($active_trail as $parent) {
             $breadcrumb[] = l($parent['title'], $parent['href'], $parent['localized_options']);
+          }
+        }
         return $breadcrumb;
+      }
       /**
        * Gets the title of the current page, as determined by the active trail.
        */
       function menu_get_active_title() {
         $active_trail = menu_get_active_trail();
         $local_task_title = NULL;
         foreach (array_reverse($active_trail) as $item) {
           // Local task titles are displayed as tabs and therefore should not be
           // repeated as the page title. However, if the local task appears in a
           // top-level menu, it is no longer a "local task" anymore (the front page
           // of the site does not have tabs) so it is better to use the local task
           // title in that case than to fall back on the front page link in the
           // active trail (which is usually "Home" and would not make sense in this
           // context).
           if ((bool) ($item['type'] & MENU_IS_LOCAL_TASK)) {
             // A local task title is being skipped; track it in case it needs to be
             // used later.
             $local_task_title = $item['title'];
+          }
           else {
             // This is not a local task, so use it for the page title (unless the
             // conditions described above are met).
             if (isset($local_task_title) && isset($item['href']) && $item['href'] == '<front>') {
               return $local_task_title;
+            }
             else {
               return $item['title'];
+            }
+          }
+        }
+      }
       /**
        * Gets a translated, access-checked menu link that is ready for rendering.
+       *
        * This function should never be called from within node_load() or any other
        * function used as a menu object load function since an infinite recursion may
        * occur.
+       *
        * @param $mlid
        *   The mlid of the menu item.
+       *
        * @return
        *   A menu link, with $item['access'] filled and link translated for
        *   rendering.
        */
       function menu_link_load($mlid) {
         if (is_numeric($mlid)) {
           $query = db_select('menu_links', 'ml');
           $query->leftJoin('menu_router', 'm', 'm.path = ml.router_path');
           $query->fields('ml');
           // Weight should be taken from {menu_links}, not {menu_router}.
           $query->addField('ml', 'weight', 'link_weight');
           $query->fields('m');
           $query->condition('ml.mlid', $mlid);
           if ($item = $query->execute()->fetchAssoc()) {
             $item['weight'] = $item['link_weight'];
             _menu_link_translate($item);
             return $item;
+          }
+        }
         return FALSE;
+      }
       /**
        * Clears the cached data for a single named menu.
        */
       function menu_cache_clear($menu_name = 'navigation') {
         $cache_cleared = &drupal_static(__FUNCTION__, array());
         if (empty($cache_cleared[$menu_name])) {
           cache_clear_all('links:' . $menu_name . ':', 'cache_menu', TRUE);
           $cache_cleared[$menu_name] = 1;
+        }
         elseif ($cache_cleared[$menu_name] == 1) {
           drupal_register_shutdown_function('cache_clear_all', 'links:' . $menu_name . ':', 'cache_menu', TRUE);
           $cache_cleared[$menu_name] = 2;
+        }
         // Also clear the menu system static caches.
         menu_reset_static_cache();
+      }
       /**
        * Clears all cached menu data.
+       *
        * This should be called any time broad changes
        * might have been made to the router items or menu links.
        */
       function menu_cache_clear_all() {
         cache_clear_all('*', 'cache_menu', TRUE);
         menu_reset_static_cache();
+      }
       /**
        * Resets the menu system static cache.
        */
       function menu_reset_static_cache() {
         drupal_static_reset('_menu_build_tree');
         drupal_static_reset('menu_tree');
         drupal_static_reset('menu_tree_all_data');
         drupal_static_reset('menu_tree_page_data');
         drupal_static_reset('menu_load_all');
         drupal_static_reset('menu_link_get_preferred');
+      }
       /**
        * Checks whether a menu_rebuild() is necessary.
        */
       function _menu_check_rebuild() {
         // To absolutely ensure that the menu rebuild is required, re-load the
         // variables in case they were set by another process.
         $variables = variable_initialize();
         if (empty($variables['menu_rebuild_needed']) && !empty($variables['menu_masks'])) {
           unset($GLOBALS['conf']['menu_rebuild_needed']);
           $GLOBALS['conf']['menu_masks'] = $variables['menu_masks'];
           return FALSE;
+        }
         return TRUE;
+      }
       /**
        * Populates the database tables used by various menu functions.
+       *
        * This function will clear and populate the {menu_router} table, add entries
        * to {menu_links} for new router items, and then remove stale items from
        * {menu_links}. If called from update.php or install.php, it will also
        * schedule a call to itself on the first real page load from
        * menu_execute_active_handler(), because the maintenance page environment
        * is different and leaves stale data in the menu tables.
+       *
        * @return
        *   TRUE if the menu was rebuilt, FALSE if another thread was rebuilding
        *   in parallel and the current thread just waited for completion.
        */
       function menu_rebuild() {
         if (!lock_acquire('menu_rebuild')) {
           // Wait for another request that is already doing this work.
           // We choose to block here since otherwise the router item may not
           // be available in menu_execute_active_handler() resulting in a 404.
           lock_wait('menu_rebuild');
           if (_menu_check_rebuild()) {
             // If we get here and menu_masks was not set, then it is possible a menu
             // is being reloaded, or that the process rebuilding the menu was unable
             // to complete successfully. A missing menu_masks variable could result
             // in a 404, so re-run the function.
             return menu_rebuild();
+          }
           return FALSE;
+        }
         $transaction = db_transaction();
         try {
           list($menu, $masks) = menu_router_build();
           _menu_router_save($menu, $masks);
           _menu_navigation_links_rebuild($menu);
           // Clear the menu, page and block caches.
           menu_cache_clear_all();
           _menu_clear_page_cache();
           if (defined('MAINTENANCE_MODE')) {
             variable_set('menu_rebuild_needed', TRUE);
+          }
           else {
             variable_del('menu_rebuild_needed');
+          }
+        }
         catch (Exception $e) {
           $transaction->rollback();
           watchdog_exception('menu', $e);
+        }
         // Explicitly commit the transaction now; this ensures that the database
         // operations during the menu rebuild are committed before the lock is made
         // available again, since locks may not always reside in the same database
         // connection. The lock is acquired outside of the transaction so should also
         // be released outside of it.
         unset($transaction);
         lock_release('menu_rebuild');
         return TRUE;
+      }
       /**
        * Collects and alters the menu definitions.
        */
       function menu_router_build() {
         // We need to manually call each module so that we can know which module
         // a given item came from.
         $callbacks = array();
         foreach (module_implements('menu') as $module) {
           $router_items = call_user_func($module . '_menu');
           if (isset($router_items) && is_array($router_items)) {
             foreach (array_keys($router_items) as $path) {
               $router_items[$path]['module'] = $module;
+            }
             $callbacks = array_merge($callbacks, $router_items);
+          }
+        }
         // Alter the menu as defined in modules, keys are like user/%user.
         drupal_alter('menu', $callbacks);
         list($menu, $masks) = _menu_router_build($callbacks);
         _menu_router_cache($menu);
         return array($menu, $masks);
+      }
       /**
        * Stores the menu router if we have it in memory.
        */
       function _menu_router_cache($new_menu = NULL) {
         $menu = &drupal_static(__FUNCTION__);
         if (isset($new_menu)) {
           $menu = $new_menu;
+        }
         return $menu;
+      }
       /**
        * Gets the menu router.
        */
       function menu_get_router() {
         // Check first if we have it in memory already.
         $menu = _menu_router_cache();
         if (empty($menu)) {
           list($menu, $masks) = menu_router_build();
+        }
         return $menu;
+      }
       /**
        * Builds a link from a router item.
        */
       function _menu_link_build($item) {
         // Suggested items are disabled by default.
         if ($item['type'] == MENU_SUGGESTED_ITEM) {
           $item['hidden'] = 1;
+        }
         // Hide all items that are not visible in the tree.
         elseif (!($item['type'] & MENU_VISIBLE_IN_TREE)) {
           $item['hidden'] = -1;
+        }
         // Note, we set this as 'system', so that we can be sure to distinguish all
         // the menu links generated automatically from entries in {menu_router}.
         $item['module'] = 'system';
         $item += array(
           'menu_name' => 'navigation',
           'link_title' => $item['title'],
           'link_path' => $item['path'],
           'hidden' => 0,
           'options' => empty($item['description']) ? array() : array('attributes' => array('title' => $item['description'])),
         );
         return $item;
+      }
       /**
        * Builds menu links for the items in the menu router.
        */
       function _menu_navigation_links_rebuild($menu) {
         // Add normal and suggested items as links.
         $menu_links = array();
         foreach ($menu as $path => $item) {
           if ($item['_visible']) {
             $menu_links[$path] = $item;
             $sort[$path] = $item['_number_parts'];
+          }
+        }
         if ($menu_links) {
           // Keep an array of processed menu links, to allow menu_link_save() to
           // check this for parents instead of querying the database.
           $parent_candidates = array();
           // Make sure no child comes before its parent.
           array_multisort($sort, SORT_NUMERIC, $menu_links);
           foreach ($menu_links as $key => $item) {
             $existing_item = db_select('menu_links')
               ->fields('menu_links')
               ->condition('link_path', $item['path'])
               ->condition('module', 'system')
               ->execute()->fetchAssoc();
             if ($existing_item) {
               $item['mlid'] = $existing_item['mlid'];
               // A change in hook_menu may move the link to a different menu
               if (empty($item['menu_name']) || ($item['menu_name'] == $existing_item['menu_name'])) {
                 $item['menu_name'] = $existing_item['menu_name'];
                 $item['plid'] = $existing_item['plid'];
+              }
               else {
                 // It moved to a new menu. Let menu_link_save() try to find a new
                 // parent based on the path.
                 unset($item['plid']);
+              }
               $item['has_children'] = $existing_item['has_children'];
               $item['updated'] = $existing_item['updated'];
+            }
             if ($existing_item && $existing_item['customized']) {
               $parent_candidates[$existing_item['mlid']] = $existing_item;
+            }
             else {
               $item = _menu_link_build($item);
               menu_link_save($item, $existing_item, $parent_candidates);
               $parent_candidates[$item['mlid']] = $item;
               unset($menu_links[$key]);
+            }
+          }
+        }
         $paths = array_keys($menu);
         // Updated and customized items whose router paths are gone need new ones.
         $result = db_select('menu_links', NULL, array('fetch' => PDO::FETCH_ASSOC))
           ->fields('menu_links', array(
             'link_path',
             'mlid',
             'router_path',
             'updated',
           ))
           ->condition(db_or()
             ->condition('updated', 1)
             ->condition(db_and()
               ->condition('router_path', $paths, 'NOT IN')
               ->condition('external', 0)
               ->condition('customized', 1)
+            )
+          )
           ->execute();
         foreach ($result as $item) {
           $router_path = _menu_find_router_path($item['link_path']);
           if (!empty($router_path) && ($router_path != $item['router_path'] || $item['updated'])) {
             // If the router path and the link path matches, it's surely a working
             // item, so we clear the updated flag.
             $updated = $item['updated'] && $router_path != $item['link_path'];
             db_update('menu_links')
               ->fields(array(
                 'router_path' => $router_path,
                 'updated' => (int) $updated,
               ))
               ->condition('mlid', $item['mlid'])
               ->execute();
+          }
+        }
         // Find any item whose router path does not exist any more.
         $result = db_select('menu_links')
           ->fields('menu_links')
           ->condition('router_path', $paths, 'NOT IN')
           ->condition('external', 0)
           ->condition('updated', 0)
           ->condition('customized', 0)
           ->orderBy('depth', 'DESC')
           ->execute();
         // Remove all such items. Starting from those with the greatest depth will
         // minimize the amount of re-parenting done by menu_link_delete().
         foreach ($result as $item) {
           _menu_delete_item($item, TRUE);
+        }
+      }
       /**
        * Clones an array of menu links.
+       *
        * @param $links
        *   An array of menu links to clone.
        * @param $menu_name
        *   (optional) The name of a menu that the links will be cloned for. If not
        *   set, the cloned links will be in the same menu as the original set of
        *   links that were passed in.
+       *
        * @return
        *   An array of menu links with the same properties as the passed-in array,
        *   but with the link identifiers removed so that a new link will be created
        *   when any of them is passed in to menu_link_save().
+       *
        * @see menu_link_save()
        */
       function menu_links_clone($links, $menu_name = NULL) {
         foreach ($links as &$link) {
           unset($link['mlid']);
           unset($link['plid']);
           if (isset($menu_name)) {
             $link['menu_name'] = $menu_name;
+          }
+        }
         return $links;
+      }
       /**
        * Returns an array containing all links for a menu.
+       *
        * @param $menu_name
        *   The name of the menu whose links should be returned.
+       *
        * @return
        *   An array of menu links.
        */
       function menu_load_links($menu_name) {
         $links = db_select('menu_links', 'ml', array('fetch' => PDO::FETCH_ASSOC))
           ->fields('ml')
           ->condition('ml.menu_name', $menu_name)
           // Order by weight so as to be helpful for menus that are only one level
           // deep.
           ->orderBy('weight')
           ->execute()
           ->fetchAll();
         foreach ($links as &$link) {
           $link['options'] = unserialize($link['options']);
+        }
         return $links;
+      }
       /**
        * Deletes all links for a menu.
+       *
        * @param $menu_name
        *   The name of the menu whose links will be deleted.
        */
       function menu_delete_links($menu_name) {
         $links = menu_load_links($menu_name);
         foreach ($links as $link) {
           // To speed up the deletion process, we reset some link properties that
           // would trigger re-parenting logic in _menu_delete_item() and
           // _menu_update_parental_status().
           $link['has_children'] = FALSE;
           $link['plid'] = 0;
           _menu_delete_item($link);
+        }
+      }
       /**
        * Delete one or several menu links.
+       *
        * @param $mlid
        *   A valid menu link mlid or NULL. If NULL, $path is used.
        * @param $path
        *   The path to the menu items to be deleted. $mlid must be NULL.
        */
       function menu_link_delete($mlid, $path = NULL) {
         if (isset($mlid)) {
           _menu_delete_item(db_query("SELECT * FROM {menu_links} WHERE mlid = :mlid", array(':mlid' => $mlid))->fetchAssoc());
+        }
         else {
           $result = db_query("SELECT * FROM {menu_links} WHERE link_path = :link_path", array(':link_path' => $path));
           foreach ($result as $link) {
             _menu_delete_item($link);
+          }
+        }
+      }
       /**
        * Deletes a single menu link.
+       *
        * @param $item
        *   Item to be deleted.
        * @param $force
        *   Forces deletion. Internal use only, setting to TRUE is discouraged.
+       *
        * @see menu_link_delete()
        */
       function _menu_delete_item($item, $force = FALSE) {
         $item = is_object($item) ? get_object_vars($item) : $item;
         if ($item && ($item['module'] != 'system' || $item['updated'] || $force)) {
           // Children get re-attached to the item's parent.
           if ($item['has_children']) {
             $result = db_query("SELECT mlid FROM {menu_links} WHERE plid = :plid", array(':plid' => $item['mlid']));
             foreach ($result as $m) {
               $child = menu_link_load($m->mlid);
               $child['plid'] = $item['plid'];
               menu_link_save($child);
+            }
+          }
           // Notify modules we are deleting the item.
           module_invoke_all('menu_link_delete', $item);
           db_delete('menu_links')->condition('mlid', $item['mlid'])->execute();
           // Update the has_children status of the parent.
           _menu_update_parental_status($item);
           menu_cache_clear($item['menu_name']);
           _menu_clear_page_cache();
+        }
+      }
       /**
        * Saves a menu link.
+       *
        * After calling this function, rebuild the menu cache using
        * menu_cache_clear_all().
+       *
        * @param $item
        *   An associative array representing a menu link item, with elements:
        *   - link_path: (required) The path of the menu item, which should be
        *     normalized first by calling drupal_get_normal_path() on it.
        *   - link_title: (required) Title to appear in menu for the link.
        *   - menu_name: (optional) The machine name of the menu for the link.
        *     Defaults to 'navigation'.
        *   - weight: (optional) Integer to determine position in menu. Default is 0.
        *   - expanded: (optional) Boolean that determines if the item is expanded.
        *   - options: (optional) An array of options, see l() for more.
        *   - mlid: (optional) Menu link identifier, the primary integer key for each
        *     menu link. Can be set to an existing value, or to 0 or NULL
        *     to insert a new link.
        *   - plid: (optional) The mlid of the parent.
        *   - router_path: (optional) The path of the relevant router item.
        * @param $existing_item
        *   Optional, the current record from the {menu_links} table as an array.
        * @param $parent_candidates
        *   Optional array of menu links keyed by mlid. Used by
        *   _menu_navigation_links_rebuild() only.
+       *
        * @return
        *   The mlid of the saved menu link, or FALSE if the menu link could not be
        *   saved.
        */
       function menu_link_save(&$item, $existing_item = array(), $parent_candidates = array()) {
         drupal_alter('menu_link', $item);
         // This is the easiest way to handle the unique internal path '<front>',
         // since a path marked as external does not need to match a router path.
         $item['external'] = (url_is_external($item['link_path'])  || $item['link_path'] == '<front>') ? 1 : 0;
         // Load defaults.
         $item += array(
           'menu_name' => 'navigation',
           'weight' => 0,
           'link_title' => '',
           'hidden' => 0,
           'has_children' => 0,
           'expanded' => 0,
           'options' => array(),
           'module' => 'menu',
           'customized' => 0,
           'updated' => 0,
         );
         if (isset($item['mlid'])) {
           if (!$existing_item) {
             $existing_item = db_query('SELECT * FROM {menu_links} WHERE mlid = :mlid', array('mlid' => $item['mlid']))->fetchAssoc();
+          }
           if ($existing_item) {
             $existing_item['options'] = unserialize($existing_item['options']);
+          }
+        }
         else {
           $existing_item = FALSE;
+        }
         // Try to find a parent link. If found, assign it and derive its menu.
         $parent = _menu_link_find_parent($item, $parent_candidates);
         if (!empty($parent['mlid'])) {
           $item['plid'] = $parent['mlid'];
           $item['menu_name'] = $parent['menu_name'];
+        }
         // If no corresponding parent link was found, move the link to the top-level.
         else {
           $item['plid'] = 0;
+        }
         $menu_name = $item['menu_name'];
         if (!$existing_item) {
           $item['mlid'] = db_insert('menu_links')
             ->fields(array(
               'menu_name' => $item['menu_name'],
               'plid' => $item['plid'],
               'link_path' => $item['link_path'],
               'hidden' => $item['hidden'],
               'external' => $item['external'],
               'has_children' => $item['has_children'],
               'expanded' => $item['expanded'],
               'weight' => $item['weight'],
               'module' => $item['module'],
               'link_title' => $item['link_title'],
               'options' => serialize($item['options']),
               'customized' => $item['customized'],
               'updated' => $item['updated'],
             ))
             ->execute();
+        }
         // Directly fill parents for top-level links.
         if ($item['plid'] == 0) {
           $item['p1'] = $item['mlid'];
           for ($i = 2; $i <= MENU_MAX_DEPTH; $i++) {
             $item["p$i"] = 0;
+          }
           $item['depth'] = 1;
+        }
         // Otherwise, ensure that this link's depth is not beyond the maximum depth
         // and fill parents based on the parent link.
         else {
           if ($item['has_children'] && $existing_item) {
             $limit = MENU_MAX_DEPTH - menu_link_children_relative_depth($existing_item) - 1;
+          }
           else {
             $limit = MENU_MAX_DEPTH - 1;
+          }
           if ($parent['depth'] > $limit) {
             return FALSE;
+          }
           $item['depth'] = $parent['depth'] + 1;
           _menu_link_parents_set($item, $parent);
+        }
         // Need to check both plid and menu_name, since plid can be 0 in any menu.
         if ($existing_item && ($item['plid'] != $existing_item['plid'] || $menu_name != $existing_item['menu_name'])) {
           _menu_link_move_children($item, $existing_item);
+        }
         // Find the router_path.
         if (empty($item['router_path'])  || !$existing_item || ($existing_item['link_path'] != $item['link_path'])) {
           if ($item['external']) {
             $item['router_path'] = '';
+          }
           else {
             // Find the router path which will serve this path.
             $item['parts'] = explode('/', $item['link_path'], MENU_MAX_PARTS);
             $item['router_path'] = _menu_find_router_path($item['link_path']);
+          }
+        }
         // If every value in $existing_item is the same in the $item, there is no
         // reason to run the update queries or clear the caches. We use
         // array_intersect_key() with the $item as the first parameter because
         // $item may have additional keys left over from building a router entry.
         // The intersect removes the extra keys, allowing a meaningful comparison.
         if (!$existing_item || (array_intersect_key($item, $existing_item) != $existing_item)) {
           db_update('menu_links')
             ->fields(array(
               'menu_name' => $item['menu_name'],
               'plid' => $item['plid'],
               'link_path' => $item['link_path'],
               'router_path' => $item['router_path'],
               'hidden' => $item['hidden'],
               'external' => $item['external'],
               'has_children' => $item['has_children'],
               'expanded' => $item['expanded'],
               'weight' => $item['weight'],
               'depth' => $item['depth'],
               'p1' => $item['p1'],
               'p2' => $item['p2'],
               'p3' => $item['p3'],
               'p4' => $item['p4'],
               'p5' => $item['p5'],
               'p6' => $item['p6'],
               'p7' => $item['p7'],
               'p8' => $item['p8'],
               'p9' => $item['p9'],
               'module' => $item['module'],
               'link_title' => $item['link_title'],
               'options' => serialize($item['options']),
               'customized' => $item['customized'],
             ))
             ->condition('mlid', $item['mlid'])
             ->execute();
           // Check the has_children status of the parent.
           _menu_update_parental_status($item);
           menu_cache_clear($menu_name);
           if ($existing_item && $menu_name != $existing_item['menu_name']) {
             menu_cache_clear($existing_item['menu_name']);
+          }
           // Notify modules we have acted on a menu item.
           $hook = 'menu_link_insert';
           if ($existing_item) {
             $hook = 'menu_link_update';
+          }
           module_invoke_all($hook, $item);
           // Now clear the cache.
           _menu_clear_page_cache();
+        }
         return $item['mlid'];
+      }
       /**
        * Finds a possible parent for a given menu link.
+       *
        * Because the parent of a given link might not exist anymore in the database,
        * we apply a set of heuristics to determine a proper parent:
+       *
        *  - use the passed parent link if specified and existing.
        *  - else, use the first existing link down the previous link hierarchy
        *  - else, for system menu links (derived from hook_menu()), reparent
        *    based on the path hierarchy.
+       *
        * @param $menu_link
        *   A menu link.
        * @param $parent_candidates
        *   An array of menu links keyed by mlid.
+       *
        * @return
        *   A menu link structure of the possible parent or FALSE if no valid parent
        *   has been found.
        */
       function _menu_link_find_parent($menu_link, $parent_candidates = array()) {
         $parent = FALSE;
         // This item is explicitely top-level, skip the rest of the parenting.
         if (isset($menu_link['plid']) && empty($menu_link['plid'])) {
           return $parent;
+        }
         // If we have a parent link ID, try to use that.
         $candidates = array();
         if (isset($menu_link['plid'])) {
           $candidates[] = $menu_link['plid'];
+        }
         // Else, if we have a link hierarchy try to find a valid parent in there.
         if (!empty($menu_link['depth']) && $menu_link['depth'] > 1) {
           for ($depth = $menu_link['depth'] - 1; $depth >= 1; $depth--) {
             $candidates[] = $menu_link['p' . $depth];
+          }
+        }
         foreach ($candidates as $mlid) {
           if (isset($parent_candidates[$mlid])) {
             $parent = $parent_candidates[$mlid];
+          }
           else {
             $parent = db_query("SELECT * FROM {menu_links} WHERE mlid = :mlid", array(':mlid' => $mlid))->fetchAssoc();
+          }
           if ($parent) {
             return $parent;
+          }
+        }
         // If everything else failed, try to derive the parent from the path
         // hierarchy. This only makes sense for links derived from menu router
         // items (ie. from hook_menu()).
         if ($menu_link['module'] == 'system') {
           $query = db_select('menu_links');
           $query->condition('module', 'system');
           // We always respect the link's 'menu_name'; inheritance for router items is
           // ensured in _menu_router_build().
           $query->condition('menu_name', $menu_link['menu_name']);
           // Find the parent - it must be unique.
           $parent_path = $menu_link['link_path'];
           do {
             $parent = FALSE;
             $parent_path = substr($parent_path, 0, strrpos($parent_path, '/'));
             $new_query = clone $query;
             $new_query->condition('link_path', $parent_path);
             // Only valid if we get a unique result.
             if ($new_query->countQuery()->execute()->fetchField() == 1) {
               $parent = $new_query->fields('menu_links')->execute()->fetchAssoc();
+            }
           } while ($parent === FALSE && $parent_path);
+        }
         return $parent;
+      }
       /**
        * Clears the page and block caches at most twice per page load.
        */
       function _menu_clear_page_cache() {
         $cache_cleared = &drupal_static(__FUNCTION__, 0);
         // Clear the page and block caches, but at most twice, including at
         //  the end of the page load when there are multiple links saved or deleted.
         if ($cache_cleared == 0) {
           cache_clear_all();
           // Keep track of which menus have expanded items.
           _menu_set_expanded_menus();
           $cache_cleared = 1;
+        }
         elseif ($cache_cleared == 1) {
           drupal_register_shutdown_function('cache_clear_all');
           // Keep track of which menus have expanded items.
           drupal_register_shutdown_function('_menu_set_expanded_menus');
           $cache_cleared = 2;
+        }
+      }
       /**
        * Updates a list of menus with expanded items.
        */
       function _menu_set_expanded_menus() {
         $names = db_query("SELECT menu_name FROM {menu_links} WHERE expanded <> 0 GROUP BY menu_name")->fetchCol();
         variable_set('menu_expanded', $names);
+      }
       /**
        * Finds the router path which will serve this path.
+       *
        * @param $link_path
        *  The path for we are looking up its router path.
+       *
        * @return
        *  A path from $menu keys or empty if $link_path points to a nonexisting
        *  place.
        */
       function _menu_find_router_path($link_path) {
         // $menu will only have data during a menu rebuild.
         $menu = _menu_router_cache();
         $router_path = $link_path;
         $parts = explode('/', $link_path, MENU_MAX_PARTS);
         $ancestors = menu_get_ancestors($parts);
         if (empty($menu)) {
           // Not during a menu rebuild, so look up in the database.
           $router_path = (string) db_select('menu_router')
             ->fields('menu_router', array('path'))
             ->condition('path', $ancestors, 'IN')
             ->orderBy('fit', 'DESC')
             ->range(0, 1)
             ->execute()->fetchField();
+        }
         elseif (!isset($menu[$router_path])) {
           // Add an empty router path as a fallback.
           $ancestors[] = '';
           foreach ($ancestors as $key => $router_path) {
             if (isset($menu[$router_path])) {
               // Exit the loop leaving $router_path as the first match.
               break;
+            }
+          }
           // If we did not find the path, $router_path will be the empty string
           // at the end of $ancestors.
+        }
         return $router_path;
+      }
       /**
        * Inserts, updates, or deletes an uncustomized menu link related to a module.
+       *
        * @param $module
        *   The name of the module.
        * @param $op
        *   Operation to perform: insert, update or delete.
        * @param $link_path
        *   The path this link points to.
        * @param $link_title
        *   Title of the link to insert or new title to update the link to.
        *   Unused for delete.
+       *
        * @return
        *   The insert op returns the mlid of the new item. Others op return NULL.
        */
       function menu_link_maintain($module, $op, $link_path, $link_title) {
         switch ($op) {
           case 'insert':
             $menu_link = array(
               'link_title' => $link_title,
               'link_path' => $link_path,
               'module' => $module,
             );
             return menu_link_save($menu_link);
             break;
           case 'update':
             $result = db_query("SELECT * FROM {menu_links} WHERE link_path = :link_path AND module = :module AND customized = 0", array(':link_path' => $link_path, ':module' => $module))->fetchAll(PDO::FETCH_ASSOC);
             foreach ($result as $link) {
               $link['link_title'] = $link_title;
               $link['options'] = unserialize($link['options']);
               menu_link_save($link);
+            }
             break;
           case 'delete':
             menu_link_delete(NULL, $link_path);
             break;
+        }
+      }
       /**
        * Finds the depth of an item's children relative to its depth.
+       *
        * For example, if the item has a depth of 2, and the maximum of any child in
        * the menu link tree is 5, the relative depth is 3.
+       *
        * @param $item
        *   An array representing a menu link item.
+       *
        * @return
        *   The relative depth, or zero.
+       *
        */
       function menu_link_children_relative_depth($item) {
         $query = db_select('menu_links');
         $query->addField('menu_links', 'depth');
         $query->condition('menu_name', $item['menu_name']);
         $query->orderBy('depth', 'DESC');
         $query->range(0, 1);
         $i = 1;
         $p = 'p1';
         while ($i <= MENU_MAX_DEPTH && $item[$p]) {
           $query->condition($p, $item[$p]);
           $p = 'p' . ++$i;
+        }
         $max_depth = $query->execute()->fetchField();
         return ($max_depth > $item['depth']) ? $max_depth - $item['depth'] : 0;
+      }
       /**
        * Updates the children of a menu link that is being moved.
+       *
        * The menu name, parents (p1 - p6), and depth are updated for all children of
        * the link, and the has_children status of the previous parent is updated.
        */
       function _menu_link_move_children($item, $existing_item) {
         $query = db_update('menu_links');
         $query->fields(array('menu_name' => $item['menu_name']));
         $p = 'p1';
         $expressions = array();
         for ($i = 1; $i <= $item['depth']; $p = 'p' . ++$i) {
           $expressions[] = array($p, ":p_$i", array(":p_$i" => $item[$p]));
+        }
         $j = $existing_item['depth'] + 1;
         while ($i <= MENU_MAX_DEPTH && $j <= MENU_MAX_DEPTH) {
           $expressions[] = array('p' . $i++, 'p' . $j++, array());
+        }
         while ($i <= MENU_MAX_DEPTH) {
           $expressions[] = array('p' . $i++, 0, array());
+        }
         $shift = $item['depth'] - $existing_item['depth'];
         if ($shift > 0) {
           // The order of expressions must be reversed so the new values don't
           // overwrite the old ones before they can be used because "Single-table
           // UPDATE assignments are generally evaluated from left to right"
           // see: http://dev.mysql.com/doc/refman/5.0/en/update.html
           $expressions = array_reverse($expressions);
+        }
         foreach ($expressions as $expression) {
           $query->expression($expression[0], $expression[1], $expression[2]);
+        }
         $query->expression('depth', 'depth + :depth', array(':depth' => $shift));
         $query->condition('menu_name', $existing_item['menu_name']);
         $p = 'p1';
         for ($i = 1; $i <= MENU_MAX_DEPTH && $existing_item[$p]; $p = 'p' . ++$i) {
           $query->condition($p, $existing_item[$p]);
+        }
         $query->execute();
         // Check the has_children status of the parent, while excluding this item.
         _menu_update_parental_status($existing_item, TRUE);
+      }
       /**
        * Checks and updates the 'has_children' status for the parent of a link.
        */
       function _menu_update_parental_status($item, $exclude = FALSE) {
         // If plid == 0, there is nothing to update.
         if ($item['plid']) {
           // Check if at least one visible child exists in the table.
           $query = db_select('menu_links');
           $query->addField('menu_links', 'mlid');
           $query->condition('menu_name', $item['menu_name']);
           $query->condition('hidden', 0);
           $query->condition('plid', $item['plid']);
           $query->range(0, 1);
           if ($exclude) {
             $query->condition('mlid', $item['mlid'], '<>');
+          }
           $parent_has_children = ((bool) $query->execute()->fetchField()) ? 1 : 0;
           db_update('menu_links')
             ->fields(array('has_children' => $parent_has_children))
             ->condition('mlid', $item['plid'])
             ->execute();
+        }
+      }
       /**
        * Sets the p1 through p9 values for a menu link being saved.
        */
       function _menu_link_parents_set(&$item, $parent) {
         $i = 1;
         while ($i < $item['depth']) {
           $p = 'p' . $i++;
           $item[$p] = $parent[$p];
+        }
         $p = 'p' . $i++;
         // The parent (p1 - p9) corresponding to the depth always equals the mlid.
         $item[$p] = $item['mlid'];
         while ($i <= MENU_MAX_DEPTH) {
           $p = 'p' . $i++;
           $item[$p] = 0;
+        }
+      }
       /**
        * Builds the router table based on the data from hook_menu().
        */
       function _menu_router_build($callbacks) {
         // First pass: separate callbacks from paths, making paths ready for
         // matching. Calculate fitness, and fill some default values.
         $menu = array();
         $masks = array();
         foreach ($callbacks as $path => $item) {
           $load_functions = array();
           $to_arg_functions = array();
           $fit = 0;
           $move = FALSE;
           $parts = explode('/', $path, MENU_MAX_PARTS);
           $number_parts = count($parts);
           // We store the highest index of parts here to save some work in the fit
           // calculation loop.
           $slashes = $number_parts - 1;
           // Extract load and to_arg functions.
           foreach ($parts as $k => $part) {
             $match = FALSE;
             // Look for wildcards in the form allowed to be used in PHP functions,
             // because we are using these to construct the load function names.
             if (preg_match('/^%(|' . DRUPAL_PHP_FUNCTION_PATTERN . ')$/', $part, $matches)) {
               if (empty($matches[1])) {
                 $match = TRUE;
                 $load_functions[$k] = NULL;
+              }
               else {
                 if (function_exists($matches[1] . '_to_arg')) {
                   $to_arg_functions[$k] = $matches[1] . '_to_arg';
                   $load_functions[$k] = NULL;
                   $match = TRUE;
+                }
                 if (function_exists($matches[1] . '_load')) {
                   $function = $matches[1] . '_load';
                   // Create an array of arguments that will be passed to the _load
                   // function when this menu path is checked, if 'load arguments'
                   // exists.
                   $load_functions[$k] = isset($item['load arguments']) ? array($function => $item['load arguments']) : $function;
                   $match = TRUE;
+                }
+              }
+            }
             if ($match) {
               $parts[$k] = '%';
+            }
             else {
               $fit |=  1 << ($slashes - $k);
+            }
+          }
           if ($fit) {
             $move = TRUE;
+          }
           else {
             // If there is no %, it fits maximally.
             $fit = (1 << $number_parts) - 1;
+          }
           $masks[$fit] = 1;
           $item['_load_functions'] = $load_functions;
           $item['to_arg_functions'] = empty($to_arg_functions) ? '' : serialize($to_arg_functions);
           $item += array(
             'title' => '',
             'weight' => 0,
             'type' => MENU_NORMAL_ITEM,
             'module' => '',
             '_number_parts' => $number_parts,
             '_parts' => $parts,
             '_fit' => $fit,
           );
           $item += array(
             '_visible' => (bool) ($item['type'] & MENU_VISIBLE_IN_BREADCRUMB),
             '_tab' => (bool) ($item['type'] & MENU_IS_LOCAL_TASK),
           );
           if ($move) {
             $new_path = implode('/', $item['_parts']);
             $menu[$new_path] = $item;
             $sort[$new_path] = $number_parts;
+          }
           else {
             $menu[$path] = $item;
             $sort[$path] = $number_parts;
+          }
+        }
         array_multisort($sort, SORT_NUMERIC, $menu);
         // Apply inheritance rules.
         foreach ($menu as $path => $v) {
           $item = &$menu[$path];
           if (!$item['_tab']) {
             // Non-tab items.
             $item['tab_parent'] = '';
             $item['tab_root'] = $path;
+          }
           // If not specified, assign the default tab type for local tasks.
           elseif (!isset($item['context'])) {
             $item['context'] = MENU_CONTEXT_PAGE;
+          }
           for ($i = $item['_number_parts'] - 1; $i; $i--) {
             $parent_path = implode('/', array_slice($item['_parts'], 0, $i));
             if (isset($menu[$parent_path])) {
               $parent = &$menu[$parent_path];
               // If we have no menu name, try to inherit it from parent items.
               if (!isset($item['menu_name'])) {
                 // If the parent item of this item does not define a menu name (and no
                 // previous iteration assigned one already), try to find the menu name
                 // of the parent item in the currently stored menu links.
                 if (!isset($parent['menu_name'])) {
                   $menu_name = db_query("SELECT menu_name FROM {menu_links} WHERE router_path = :router_path AND module = 'system'", array(':router_path' => $parent_path))->fetchField();
                   if ($menu_name) {
                     $parent['menu_name'] = $menu_name;
+                  }
+                }
                 // If the parent item defines a menu name, inherit it.
                 if (!empty($parent['menu_name'])) {
                   $item['menu_name'] = $parent['menu_name'];
+                }
+              }
               if (!isset($item['tab_parent'])) {
                 // Parent stores the parent of the path.
                 $item['tab_parent'] = $parent_path;
+              }
               if (!isset($item['tab_root']) && !$parent['_tab']) {
                 $item['tab_root'] = $parent_path;
+              }
               // If an access callback is not found for a default local task we use
               // the callback from the parent, since we expect them to be identical.
               // In all other cases, the access parameters must be specified.
               if (($item['type'] == MENU_DEFAULT_LOCAL_TASK) && !isset($item['access callback']) && isset($parent['access callback'])) {
                 $item['access callback'] = $parent['access callback'];
                 if (!isset($item['access arguments']) && isset($parent['access arguments'])) {
                   $item['access arguments'] = $parent['access arguments'];
+                }
+              }
               // Same for page callbacks.
               if (!isset($item['page callback']) && isset($parent['page callback'])) {
                 $item['page callback'] = $parent['page callback'];
                 if (!isset($item['page arguments']) && isset($parent['page arguments'])) {
                   $item['page arguments'] = $parent['page arguments'];
+                }
                 if (!isset($item['file path']) && isset($parent['file path'])) {
                   $item['file path'] = $parent['file path'];
+                }
                 if (!isset($item['file']) && isset($parent['file'])) {
                   $item['file'] = $parent['file'];
                   if (empty($item['file path']) && isset($item['module']) && isset($parent['module']) && $item['module'] != $parent['module']) {
                     $item['file path'] = drupal_get_path('module', $parent['module']);
+                  }
+                }
+              }
               // Same for delivery callbacks.
               if (!isset($item['delivery callback']) && isset($parent['delivery callback'])) {
                 $item['delivery callback'] = $parent['delivery callback'];
+              }
               // Same for theme callbacks.
               if (!isset($item['theme callback']) && isset($parent['theme callback'])) {
                 $item['theme callback'] = $parent['theme callback'];
                 if (!isset($item['theme arguments']) && isset($parent['theme arguments'])) {
                   $item['theme arguments'] = $parent['theme arguments'];
+                }
+              }
               // Same for load arguments: if a loader doesn't have any explict
               // arguments, try to find arguments in the parent.
               if (!isset($item['load arguments'])) {
                 foreach ($item['_load_functions'] as $k => $function) {
                   // This loader doesn't have any explict arguments...
                   if (!is_array($function)) {
                     // ... check the parent for a loader at the same position
                     // using the same function name and defining arguments...
                     if (isset($parent['_load_functions'][$k]) && is_array($parent['_load_functions'][$k]) && key($parent['_load_functions'][$k]) === $function) {
                       // ... and inherit the arguments on the child.
                       $item['_load_functions'][$k] = $parent['_load_functions'][$k];
+                    }
+                  }
+                }
+              }
+            }
+          }
           if (!isset($item['access callback']) && isset($item['access arguments'])) {
             // Default callback.
             $item['access callback'] = 'user_access';
+          }
           if (!isset($item['access callback']) || empty($item['page callback'])) {
             $item['access callback'] = 0;
+          }
           if (is_bool($item['access callback'])) {
             $item['access callback'] = intval($item['access callback']);
+          }
           $item['load_functions'] = empty($item['_load_functions']) ? '' : serialize($item['_load_functions']);
           $item += array(
             'access arguments' => array(),
             'access callback' => '',
             'page arguments' => array(),
             'page callback' => '',
             'delivery callback' => '',
             'title arguments' => array(),
             'title callback' => 't',
             'theme arguments' => array(),
             'theme callback' => '',
             'description' => '',
             'position' => '',
             'context' => 0,
             'tab_parent' => '',
             'tab_root' => $path,
             'path' => $path,
             'file' => '',
             'file path' => '',
             'include file' => '',
           );
           // Calculate out the file to be included for each callback, if any.
           if ($item['file']) {
             $file_path = $item['file path'] ? $item['file path'] : drupal_get_path('module', $item['module']);
             $item['include file'] = $file_path . '/' . $item['file'];
+          }
+        }
         // Sort the masks so they are in order of descending fit.
         $masks = array_keys($masks);
         rsort($masks);
         return array($menu, $masks);
+      }
       /**
        * Saves data from menu_router_build() to the router table.
        */
       function _menu_router_save($menu, $masks) {
         // Delete the existing router since we have some data to replace it.
         db_truncate('menu_router')->execute();
         // Prepare insert object.
         $insert = db_insert('menu_router')
           ->fields(array(
             'path',
             'load_functions',
             'to_arg_functions',
             'access_callback',
             'access_arguments',
             'page_callback',
             'page_arguments',
             'delivery_callback',
             'fit',
             'number_parts',
             'context',
             'tab_parent',
             'tab_root',
             'title',
             'title_callback',
             'title_arguments',
             'theme_callback',
             'theme_arguments',
             'type',
             'description',
             'position',
             'weight',
             'include_file',
           ));
         $num_records = 0;
         foreach ($menu as $path => $item) {
           // Fill in insert object values.
           $insert->values(array(
             'path' => $item['path'],
             'load_functions' => $item['load_functions'],
             'to_arg_functions' => $item['to_arg_functions'],
             'access_callback' => $item['access callback'],
             'access_arguments' => serialize($item['access arguments']),
             'page_callback' => $item['page callback'],
             'page_arguments' => serialize($item['page arguments']),
             'delivery_callback' => $item['delivery callback'],
             'fit' => $item['_fit'],
             'number_parts' => $item['_number_parts'],
             'context' => $item['context'],
             'tab_parent' => $item['tab_parent'],
             'tab_root' => $item['tab_root'],
             'title' => $item['title'],
             'title_callback' => $item['title callback'],
             'title_arguments' => ($item['title arguments'] ? serialize($item['title arguments']) : ''),
             'theme_callback' => $item['theme callback'],
             'theme_arguments' => serialize($item['theme arguments']),
             'type' => $item['type'],
             'description' => $item['description'],
             'position' => $item['position'],
             'weight' => $item['weight'],
             'include_file' => $item['include file'],
           ));
           // Execute in batches to avoid the memory overhead of all of those records
           // in the query object.
           if (++$num_records == 20) {
             $insert->execute();
             $num_records = 0;
+          }
+        }
         // Insert any remaining records.
         $insert->execute();
         // Store the masks.
         variable_set('menu_masks', $masks);
         return $menu;
+      }
       /**
        * Checks whether the site is in maintenance mode.
+       *
        * This function will log the current user out and redirect to front page
        * if the current user has no 'access site in maintenance mode' permission.
+       *
        * @param $check_only
        *   If this is set to TRUE, the function will perform the access checks and
        *   return the site offline status, but not log the user out or display any
        *   messages.
+       *
        * @return
        *   FALSE if the site is not in maintenance mode, the user login page is
        *   displayed, or the user has the 'access site in maintenance mode'
        *   permission. TRUE for anonymous users not being on the login page when the
        *   site is in maintenance mode.
        */
       function _menu_site_is_offline($check_only = FALSE) {
         // Check if site is in maintenance mode.
         if (variable_get('maintenance_mode', 0)) {
           if (user_access('access site in maintenance mode')) {
             // Ensure that the maintenance mode message is displayed only once
             // (allowing for page redirects) and specifically suppress its display on
             // the maintenance mode settings page.
             if (!$check_only && $_GET['q'] != 'admin/config/development/maintenance') {
               if (user_access('administer site configuration')) {
                 drupal_set_message(t('Operating in maintenance mode. <a href="@url">Go online.</a>', array('@url' => url('admin/config/development/maintenance'))), 'status', FALSE);
+              }
               else {
                 drupal_set_message(t('Operating in maintenance mode.'), 'status', FALSE);
+              }
+            }
+          }
           else {
             return TRUE;
+          }
+        }
         return FALSE;
+      }
       /**
        * @} End of "defgroup menu".
        */

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root / drupal7 / includes / menu.inc @ 01dfd3b5