MitFrame/index.php

<?php

if(!empty($_GET['app'])) {
	$_app = $_GET['app'];
} else {
	$_app = 'index';
}

define('DISCUZ_APP', $_app);

if(!preg_match('/^\w+$/', $_app)) {
	exit('Access Denied');
}

$f = './source/app/'.$_app.'/'.$_app.'.php';

require $f;