/**
* Add a callback to an event queue, after a given event.
*
* @param string event name
* @param array existing event callback
* @param array event callback
* @return boolean
*/
public static function add_after($name, $existing, $callback)
{
if (empty(Event::$events[$name]) or ($key = array_search($existing, Event::$events[$name])) === FALSE) {
// Just add the event if there are no events
return Event::add($name, $callback);
} else {
// Insert the event immediately after the existing event
return Event::insert_event($name, $key + 1, $callback);
}
}
