3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo passthru('help');
Output for 5.4.44 - 5.6.28, 7.0.0 - 7.1.0
Output for hhvm-3.10.0 - 3.12.0
Failed to exec: `help'
Output for 5.2.14 - 5.4.43
sh: 1: help: not found