Proxy

[Goku]

I have a question on the proxy demo code.
Is it necessary to let Security inherit from Door?
From the GoF book, I'm think it should be.

[Kamran Ahmed]

Hey, there could be multiple ways to implement the proxy; you can do it the way I explained in the example or you could do it the other way using inheritance e.g. you could have a default Door class and then you could have a SecuredDoor class extending from the Door class while overriding the methods of the class and adding some functionality on top of each method i.e.

class Door {
    public function open() {
        echo 'Opening the door';
    }

    public function close() {
        echo 'Closing the door';
    }
}

then the proxy class

class SecuredDoor extends Door {
    public function open () {
        echo 'Securing the door';
        parent::open();
    }
}

then use it

$door = new SecuredDoor();

$door->open();
// We don't want to add any additional functionality 
// so it will be proxied to the parent class
$door->close();

Hope it helps.

[Goku]

aha, I got it, thanks for your reply. And, thanks for your share. 👍