Find 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.

Parameters

$item: An array representing a menu link item.

Return value

The relative depth, or zero.

Related topics

File

drupal-6.x/includes/menu.inc, line 2170

API for the Drupal menu system.

Code

function menu_link_children_relative_depth($item) {
  $i = 1;
  $match = '';
  $args[] = $item['menu_name'];
  $p = 'p1';
  while ($i <= MENU_MAX_DEPTH && $item[$p]) {
    $match .= " AND $p = %d";
    $args[] = $item[$p];
    $p = 'p' . ++$i;
  }

  $max_depth = db_result(db_query_range("SELECT depth FROM {menu_links} WHERE menu_name = '%s'" . $match . " ORDER BY depth DESC", $args, 0, 1));

  return ($max_depth > $item['depth']) ? $max_depth - $item['depth'] : 0;
}