3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php system("w"); ?>
Output for 4.3.0 - 5.3.28, 5.4.0 - 5.4.24, 5.4.45 - 7.2.0
Output for 5.3.29, 5.4.25 - 5.4.44
sh: 1: w: not found