3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php exec('whoami'); ?>
Output for 4.3.0, 5.4.40 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Output for 5.4.39
Warning: exec(): Unable to fork [whoami] in /in/lUZL1 on line 2
Output for 4.3.1 - 5.4.38
sh: 1: whoami: not found