Online PHP editor | vld for cl3o5

<?php class A { public function printMe() { print get_class($this).PHP_EOL; } } class AB extends A { } class App { public function run(A $a) { $a->printMe(); } } class MyApp extends App { public function run(AB $ab) { parent::run($ab); } } $ab = new AB(); $app = new MyApp(); $app->run($ab);