- var_dump: documentation ( source)
- bin2hex: documentation ( source)
<?php
$key = '12345678';
$data = '1234567890123456';
var_dump(
bin2hex(mcrypt_encrypt(MCRYPT_DES, $key, $data, MCRYPT_MODE_ECB, '')),
bin2hex(openssl_encrypt($data, 'des-ecb', $key, OPENSSL_RAW_DATA, ''))
);