3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class A{} class B extends A{} function aaa(A $a){ print 'yoo'; } aaa(new B);
Output for 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.0 - 7.3.0beta1
yoo