BUUCTF——[极客大挑战 2019]PHP

打开题目，页面上显示说习惯备份，尝试下载备份www.zip,下载后打开查看

flag文件里并不是flag，查看其他的在class文件中发现代码，应该是让我们反序列化,给出源代码

username = $username;
        $this->password = $password;
    }

    function __wakeup(){
        $this->username = 'guest';
    }

    function __destruct(){
        if ($this->password != 100) {         //不等于100输出no所以password=100
            echo "
NO!!!hacker!!!
";
            echo "You name is: ";
            echo $this->username;echo "
";
            echo "You password is: ";