Online PHP editor | refs for UbENP

<?php abstract class BaseTest { public function equals($value) { return $value instanceof static; } } class Test extends BaseTest { } class Test2 extends BaseTest { } $a = new Test(); $b = new Test(); $c = new Test2(); var_dump($a->equals($b)); var_dump($a->equals($c)); var_dump($a->equals('ahoj'));