--TEST-- ReflectionObject::isInstance() - basic function test --FILE-- new A, "myB" => new B, "myX" => new X ); foreach ($classes as $class) { $ro = new ReflectionObject(new $class); foreach ($instances as $name => $instance) { echo "is $name a $class? "; var_dump($ro->isInstance($instance)); } } ?> --EXPECTF-- is myA a A? bool(true) is myB a A? bool(true) is myX a A? bool(false) is myA a B? bool(false) is myB a B? bool(true) is myX a B? bool(false) is myA a X? bool(false) is myB a X? bool(false) is myX a X? bool(true)