function _menu_find_router_path

Find the router path which will serve this path.

Parameters

$link_path: The path for we are looking up its router path.

Return value

A path from $menu keys or empty if $link_path points to a nonexisting place.

Related topics

File

includes/menu.inc, line 2093

API for the Drupal menu system.

Code

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('/', $link_path, MENU_MAX_PARTS);
  list($ancestors, $placeholders) = menu_get_ancestors($parts);
  if (empty($menu)) {

    // Not during a menu rebuild, so look up in the database.
    $router_path = (string) db_result(db_query_range('SELECT path FROM {menu_router} WHERE path IN (' . implode(',', $placeholders) . ') ORDER BY fit DESC', $ancestors, 0, 1));
  }
  elseif (!isset($menu[$router_path])) {

    // Add an empty 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;
}