Invoke a hook in all enabled modules that implement it.

Parameters

$hook: The name of the hook to invoke.

...: Arguments to pass to the hook.

Return value

An array of return values of the hook implementations. If modules return arrays from their implementations, those are merged into one array.

Related topics

File

drupal-6.x/includes/module.inc, line 490

API for loading and interacting with Drupal modules.

Code

function module_invoke_all() {
  $args = func_get_args();
  $hook = $args[0];
  unset($args[0]);
  $return = array();
  foreach (module_implements($hook) as $module) {
    $function = $module . '_' . $hook;
    $result = call_user_func_array($function, $args);
    if (isset($result) && is_array($result)) {
      $return = array_merge_recursive($return, $result);
    }
    else if (isset($result)) {
      $return[] = $result;
    }
  }

  return $return;
}