3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class A { public function b(A $a = null) { var_dump($a); } } $x = new A(); $y = null; $x->b($y);
based on v54Ze
Output for 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.0 - 7.3.0beta1
NULL