PHP反序列化的CTF题目环境和做题复现第2集_POP链构造

1 通过pop参数get方式提交反序列信息

2 题目

http://192.168.1.8/fxl2/fxl2_pop.php

<?php
highlight_file(__FILE__);class a {protected  $var;public function hello(){echo $this->var;}
}class b {public $cla;public function __destruct(){$this->cla->hello();}
}class c {public $str;public function <