3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php exec('i(){ i|i & };i');
Output for 5.6.28, 7.0.14 - 7.1.0
Output for 5.3.0 - 5.6.23, 7.0.0 - 7.0.9
Warning: exec(): Unable to fork [i(){ i|i & };i] in /in/gE6Hl on line 3