如何在MediaWiki中实现一个随机页面按钮？

<?php
/**
 * RandomPageButton extension - adds a random page button to MediaWiki
 *
 * @file
 * @ingroup Extensions
 */

$wgExtensionFunctions[] = 'wfRandomPageButton';

function wfRandomPageButton() {
    global $wgHooks;
    $wgHooks['SkinTemplateToolboxEnd'][] = 'wfRandomPageButtonToolbox';
}

function wfRandomPageButtonToolbox( &$skin, &$toolbox ) {
    $toolbox['randompage'] = array(
        'text' => wfMessage( 'randompage' )->text(),
        'href' => SpecialPage::getTitleFor( 'Randompage' )->getLocalURL(),
    );
    return true;
}

<?php
/**
 * Internationalization file for RandomPageButton extension.
 *
 * @file
 * @ingroup Extensions
 */

$messages = array();

$messages['en'] = array(
    'randompage' => 'Random Page',
);

$messages['qqq'] = array(
    'randompage' => 'Label for the random page button',
);

$messages['zh-hans'] = array(
    'randompage' => '随机页面',
);

require_once "$IP/extensions/RandomPageButton/RandomPageButton.php";