3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php namespace foo; const null = true; var_dump(null);
Output for hhvm-3.10.0 - 3.12.0
NULL
Output for 5.3.0 - 5.4.10
Fatal error: Cannot redeclare constant 'null' in /in/E5PBH on line 5
Process exited with code 255.