3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class Foo { function __constructor(){} } $a = null; $f = new Foo($a = 1); var_dump($a);
Output for hhvm-3.10.0 - 3.12.0, 7.1.0
int(1)
Output for 4.3.0 - 5.6.28, 7.0.0 - 7.0.14
NULL