/* include the modX class */
if (!@include_once (MODX_CORE_PATH . "model/modx/modx.class.php")) {
$errorMessage = 'Site temporarily unavailable';
@include(MODX_CORE_PATH . 'error/unavailable.include.php');
header('HTTP/1.1 503 Service Unavailable');
echo "<html><title>Error 503: Site temporarily unavailable</title><body><h1>Error 503</h1><p>{$errorMessage}</p></body></html>";
exit();
}