3v4l.org

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