3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $o = ''; exec('host example.com', $o); var_dump($o);
Output for 4.3.0 - 5.6.28, 7.0.0 - 7.1.0
array(0) { }
Output for hhvm-3.10.0 - 3.12.0
array(1) { [0]=> string(34) "Failed to exec: `host example.com'" }