MODX Revolution Quick File and DB Backup PHP-CLI Script

modx-revolution-backup.php

<?php
if ( !shell_exec("type type")) { echo "Weak your PHP powers are, Luke."; die; }
$dir = "../backup"; /* Verzeichnis außerhalb des Webroot */
$configFile = "./core/config/config.inc.php";
if (file_exists($configFile)) {
    include($configFile);
    $date = date("Ymd-His");
    $targetSql = "$dir/{$date}_mysql.sql";
    $targetTar = "$dir/{$date}_files.tar";
    system("mkdir $dir");
    system("mysqldump --host=$database_server --user=$database_user --password=$database_password --databases $dbase > {$targetSql}");
    system("tar cf {$targetTar} ./");
    echo "Backup done. Now run 'php modx-revolution-upgrade.php";
}
?>

proudly copied from http://de.modx.com/blog/2014/03/modx-revolution-updates-vereinfachen and modified a bit

What does the "type type" mean? :)