- chunk_split: documentation ( source)
- bin2hex: documentation ( source)
<?php
$key = "1234567890abcdef";
$plain = "query=111111111111111&f=ROZWAL_{ECBECBECB}";
$res = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $plain, "ecb");
chunk_split(bin2hex($res), 32, ' ');