一天一个设计模式（11）——代理模式

<?php
interface IDoor {
    public function open();
}

class Door implements IDoor {
    public function open() {
        echo 'The door has opened';
    }
}

class CodedDoor {
    protected $door;
    public function __construct() {
        $this->door = new Door();
    }

    public function open($password) {
        if ($this->authenticate($password)) {
            $this->door->open();
        } else {
            echo 'The password is wrong';
        }
    }

    public function authenticate($password) {
        return $password === 'password';
    }
}

$door = new CodedDoor();
$door->open('password');