MediaWiki/includes/libs/MessageSpecifier.php

<?php
/**
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

interface MessageSpecifier {
	/**
	 * Returns the message key
	 *
	 * If a list of multiple possible keys was supplied to the constructor, this method may
	 * return any of these keys. After the message has been fetched, this method will return
	 * the key that was actually used to fetch the message.
	 *
	 * @return string
	 */
	public function getKey();

	/**
	 * Returns the message parameters
	 *
	 * @return array
	 */
	public function getParams();
}