3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class Foo { function __constructor(){} } $a = null; $f = new Foo($a = 1); var_dump($a);
Output for 7.1.0 - 7.2.0
int(1)
Output for 4.3.0 - 7.0.20
NULL