3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(E_ALL | E_STRICT); class Foo{ function __construct(StdClass $boo) {}} class Bar extends Foo {function __construct(StdClass $boo, array $a){}} new Bar(new StdClass, []);

preferences:
33.83 ms | 402 KiB | 5 Q