3v4l.org

run code in 300+ PHP versions simultaneously
<?php $fsc = 3250390100187711498; $id = 22327820; echo base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, '1320686422', $fsc, MCRYPT_MODE_ECB));

preferences:
43.52 ms | 402 KiB | 5 Q