3v4l.org

run code in 300+ PHP versions simultaneously
<?php $key = pack('H*', $aux); $data = pack('H*', $xorR); $aux=bin2hex(mcrypt_encrypt(MCRYPT_DES, $key, $data, MCRYPT_MODE_ECB)); echo $aux;

preferences:
36.45 ms | 402 KiB | 5 Q