3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php shell_exec('crontab -l'); echo 'Hello world';
based on U9nNl
Output for 4.3.0, 5.4.45 - 7.2.0
Hello world
Output for 4.3.1 - 5.4.44
Hello worldsh: 1: crontab: not found