note 120852 deleted from internals2.opcodes.instanceof by cmb
| From: | cmb@php.net | Date: | Sun, 10 Jan 2021 13:21:36 +0000 |
| Subject: | note 120852 deleted from internals2.opcodes.instanceof by cmb | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-216096@lists.php.net to get a copy of this message | ||
Note Submitter: katrinaelaine6 at gmail dot com
----
instanceof also works on abstract classes and interfaces.
<?php
abstract class Grandpa {}
interface Father {}
interface Son {}
class Base extends Grandpa implements Father {}
class Child extends Base implements Son {}
$b = new Base();
$c = new Child();
/* All of the following are true. */
var_dump($b instanceof Grandpa);
var_dump($b instanceof Father);
var_dump($c instanceof Son);
var_dump($c instanceof Father);
var_dump($c instanceof Grandpa);
?>