3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace Foo { class A { } } namespace Bar { use Foo\A; class B extends A { } } namespace { use Foo\A; use Bar\B; $a = new A(); var_dump($a); $b = new B(); var_dump($b); }

preferences:
44.02 ms | 402 KiB | 5 Q