<?php
header("content-type:text/html;charset=utf8");
highlight_file(__FILE__);

global $myFlag;
error_reporting(0);
include "flag5.php";

$key = "bihuo.cn";
$str = $_GET['str'];
$a = unserialize($str);
if (unserialize($str) === "$key"){
    echo $myFlag;
}else{
    echo "你反序列化的字符串不符合我的口味";
} flag{43d35391d77730cfb16953979ad97b25}