Save a menu link.

Parameters

$item: An array representing a menu link item. The only mandatory keys are link_path and link_title. Possible keys are:

• menu_name: Default is navigation.
• weight: Default is 0.
• expanded: Whether the item is expanded.
• options: An array of options, see l() for more.
• mlid: Set to an existing value, or 0 or NULL to insert a new link.
• plid: The mlid of the parent.
• router_path: The path of the relevant router item.

Return value

The mlid of the saved menu link, or FALSE if the menu link could not be saved.

Related topics

File

drupal-6.x/includes/menu.inc, line 1904

API for the Drupal menu system.

Code

function menu_link_save(&$item) {

  // Get the router if it's already in memory. $menu will be NULL, unless this
  // is during a menu rebuild
  $menu = _menu_router_cache();
  drupal_alter('menu_link', $item, $menu);

  // 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.
  $item['_external'] = menu_path_is_external($item['link_path']) || $item['link_path'] == '<front>';
  // 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,
  );
  $existing_item = FALSE;
  if (isset($item['mlid'])) {
    $existing_item = db_fetch_array(db_query("SELECT * FROM {menu_links} WHERE mlid = %d", $item['mlid']));
  }

  if (isset($item['plid'])) {
    $parent = db_fetch_array(db_query("SELECT * FROM {menu_links} WHERE mlid = %d", $item['plid']));
  }
  else {
    // Find the parent - it must be unique.
    $parent_path = $item['link_path'];
    $where = "WHERE link_path = '%s'";
    // Only links derived from router items should have module == 'system', and
    // we want to find the parent even if it's in a different menu.
    if ($item['module'] == 'system') {
      $where .= " AND module = '%s'";
      $arg2 = 'system';
    }
    else {
      // If not derived from a router item, we respect the specified menu name.
      $where .= " AND menu_name = '%s'";
      $arg2 = $item['menu_name'];
    }
    do {
      $parent = FALSE;
      $parent_path = substr($parent_path, 0, strrpos($parent_path, '/'));
      $result = db_query("SELECT COUNT(*) FROM {menu_links} " . $where, $parent_path, $arg2);
      // Only valid if we get a unique result.
      if (db_result($result) == 1) {
        $parent = db_fetch_array(db_query("SELECT * FROM {menu_links} " . $where, $parent_path, $arg2));
      }
    } while ($parent === FALSE && $parent_path);
  }
  if ($parent !== FALSE) {
    $item['menu_name'] = $parent['menu_name'];
  }
  $menu_name = $item['menu_name'];
  // Menu callbacks need to be in the links table for breadcrumbs, but can't
  // be parents if they are generated directly from a router item.
  if (empty($parent['mlid']) || $parent['hidden'] < 0) {
    $item['plid'] = 0;
  }
  else {
    $item['plid'] = $parent['mlid'];
  }

  if (!$existing_item) {
    db_query("INSERT INTO {menu_links} (
       menu_name, plid, link_path,
      hidden, external, has_children,
      expanded, weight,
      module, link_title, options,
      customized, updated) VALUES (
      '%s', %d, '%s',
      %d, %d, %d,
      %d, %d,
      '%s', '%s', '%s', %d, %d)", 
    $item['menu_name'], $item['plid'], $item['link_path'], 
    $item['hidden'], $item['_external'], $item['has_children'], 
    $item['expanded'], $item['weight'], 
    $item['module'], $item['link_title'], serialize($item['options']), 
    $item['customized'], $item['updated']);
    $item['mlid'] = db_last_insert_id('menu_links', 'mlid');
  }

  if (!$item['plid']) {
    $item['p1'] = $item['mlid'];
    for ($i = 2; $i <= MENU_MAX_DEPTH; $i++) {
      $item["p$i"] = 0;
    }
    $item['depth'] = 1;
  }
  else {
    // Cannot add beyond the maximum depth.
    if ($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, $existing_item);
  }
  // Find the callback. During the menu update we store empty paths to be
  // fixed later, so we skip this.
  if (!isset($_SESSION['system_update_6021']) && (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']);
    }
  }
  db_query("UPDATE {menu_links} SET menu_name = '%s', plid = %d, link_path = '%s',
    router_path = '%s', hidden = %d, external = %d, has_children = %d,
    expanded = %d, weight = %d, depth = %d,
    p1 = %d, p2 = %d, p3 = %d, p4 = %d, p5 = %d, p6 = %d, p7 = %d, p8 = %d, p9 = %d,
    module = '%s', link_title = '%s', options = '%s', customized = %d WHERE mlid = %d", 
  $item['menu_name'], $item['plid'], $item['link_path'], 
  $item['router_path'], $item['hidden'], $item['_external'], $item['has_children'], 
  $item['expanded'], $item['weight'], $item['depth'], 
  $item['p1'], $item['p2'], $item['p3'], $item['p4'], $item['p5'], $item['p6'], $item['p7'], $item['p8'], $item['p9'], 
  $item['module'], $item['link_title'], serialize($item['options']), $item['customized'], $item['mlid']);
  // Check the has_children status of the parent.
  _menu_update_parental_status($item);
  menu_cache_clear($menu_name);
  if ($existing_item && $menu_name != $existing_item['menu_name']) {
    menu_cache_clear($existing_item['menu_name']);
  }

  _menu_clear_page_cache();
  return $item['mlid'];
}