3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo 'Hi' . john;
Output for 7.2.0
Warning: Use of undefined constant john - assumed 'john' (this will throw an Error in a future version of PHP) in /in/CXGoe on line 3 Hijohn
Output for 5.3.18 - 7.1.10
Notice: Use of undefined constant john - assumed 'john' in /in/CXGoe on line 3 Hijohn