- base64_decode: documentation ( source)
- urldecode: documentation ( source)
- unserialize: documentation ( source)
<?php
$t = 'z4OXa4HRsRPzCZMW40gp3VBJJUtwXeA%2FAr5wcPTgo2RvWa%2FBgtZjKOtD%2B8ERUvJO%2FkOkijIka6RWslC0sr7uoA%3D%3D';
$s = urldecode($t);
$d = base64_decode($s);
echo unserialize($d);