decrypting query string back into $_GET['var']

What is the best way to decrypt a query string back into variables ? $root = "http://www.myserver.com/script.php"; $queryString = "?test=mytest&color=red"; myEncrypt($queryString); //add mCrypt encryption $finalURL = $root.$encryptedQueryString; what is the proper what to decrypt the GET variables on the other side ? Do you need to decrypt the query string first ? decrypt($_SERVER['QUERY_STRING']); Once you have decrypted it, can you pass it along to a $_GET as you would with an unencrypted query string ? $test = $_GET['test']; Or, do you need to parse the string to extract variables? many thanks g