PHP“引用”漏洞今日例题：<?php highlight_file(__FILE__); error_reporting(0); include("flag.php"); class just4fun { var $enter; var $secret; } if (isset($_GET['pass'])) { $pass = $_GET['pass']; $pass=str_replace('*','\*',$pass); } $o = unserialize($pass); if ($o) { $o->secret