3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php system('echo "hello"');
Output for 4.3.0 - 5.3.28, 5.4.0 - 5.4.25, 5.4.41 - 7.2.0
Output for 5.3.29, 5.4.26 - 5.4.40
hello