3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo 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/AcZO1 on line 2 Hello
Output for 4.3.0 - 7.1.10
Notice: Use of undefined constant Hello - assumed 'Hello' in /in/AcZO1 on line 2 Hello