3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo (bool) HELLO;
Output for 7.2.0
Warning: Use of undefined constant HELLO - assumed 'HELLO' (this will throw an Error in a future version of PHP) in /in/g7rif on line 3 1
Output for 4.3.0 - 7.1.10
Notice: Use of undefined constant HELLO - assumed 'HELLO' in /in/g7rif on line 3 1