3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo Hello;
Output for 7.2.0 - 7.3.0rc4
Warning: Use of undefined constant Hello - assumed 'Hello' (this will throw an Error in a future version of PHP) in /in/kWI4n on line 3 Hello
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.21.3, 7.0.0 - 7.1.20
Notice: Use of undefined constant Hello - assumed 'Hello' in /in/kWI4n on line 3 Hello
Output for hhvm-3.22.0
Notice: Use of undefined constant Hello - assumed 'Hello' in /in/kWI4n on line -1 Hello