- hex2bin: documentation ( source)
- base64_decode: documentation ( source)
- strrev: documentation ( source)
<?php
$encodedSecret = "3d3d516343746d4d6d6c315669563362";
#function encodeSecret($secret) {
# return bin2hex(strrev(base64_encode($secret)));
print(base64_decode(strrev(hex2bin($encodedSecret))));
?>