3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php system("/bin/ls");
Output for 4.3.0 - 5.6.30, 7.0.0 - 7.2.0
Output for hhvm-3.11.1 - 3.17.3
Failed to exec: `/bin/ls'
Output for hhvm-3.10.1

Process exited with code 137.