3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class Foo {} $a = null; $f = new Foo($a = 123); var_dump($a); // NULL
Output for 7.1.0 - 7.2.0
int(123)
Output for 4.3.0 - 5.0.5, 5.1.1 - 7.0.20
NULL
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/ZDH63 on line 6
Process exited with code 255.