3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php exec(1);
Output for 5.6.28, 7.0.14 - 7.1.0
Output for 5.0.0 - 5.6.25, 7.0.0 - 7.0.10
Warning: exec(): Unable to fork [1] in /in/ufs6H on line 2
Output for 4.3.0 - 4.4.9

Process exited with code 139.