Loads all child link IDs of a given menu link, regardless of visibility.

This method is mostly useful for testing.

Parameters

string $id: The menu link plugin ID.

Return value

array An unordered array of IDs representing the IDs of all children, or NULL if the ID is invalid.

Overrides MenuLinkManagerInterface::getChildIds

File

core/lib/Drupal/Core/Menu/MenuLinkManager.php, line 285

Class

MenuLinkManager

Manages discovery, instantiation, and tree building of menu link plugins.

Namespace

Drupal\Core\Menu

Code

public function getChildIds($id) {
  if ($this->getDefinition($id, FALSE)) {
    return $this->treeStorage
      ->getAllChildIds($id);
  }
  return NULL;
}

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