[ticket/12782] Use an interface for the phpbb event_dispatcher

PHPBB3-12782

phpBB/phpbb/event/dispatcher_interface.php

@@ -0,0 +1,33 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\event;
+
+/**
+* Extension of the Symfony2 EventDispatcher
+*
+* It provides an additional `trigger_event` method, which
+* gives some syntactic sugar for dispatching events. Instead
+* of creating the event object, the method will do that for
+* you.
+*
+* Example:
+*
+* $vars = array('page_title');
+* extract($phpbb_dispatcher->trigger_event('core.index', compact($vars)));
+*
+*/
+interface dispatcher_interface extends \Symfony\Component\EventDispatcher\EventDispatcherInterface
+{
+	public function trigger_event($eventName, $data = array());
+}