3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { private function z() { echo __METHOD__; } public function x() { $callback = [[new $this(), "z"], []]; call_user_func_array("call_user_func_array", $callback); } } (new A())->x();

preferences:
25.42 ms | 404 KiB | 5 Q