3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php if(defined("WHATEVER_THIS_ISNT_DEFINED")){ echo 'yup, constant defined'; } else { echo 'nope, does not exist'; }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
nope, does not exist