- substr: documentation ( source)
- var_dump: documentation ( source)
- base64_decode: documentation ( source)
- base64_encode: documentation ( source)
<?php
function encode($message, $seed) { return base64_encode($message.$seed); }
function decode($data, $seed) { return substr(base64_decode($data), 0, strlen($seed)*-1); }
var_dump($data = encode('hi this is a string','seed123'), decode($data, 'seed123'));