3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php for($a=0;$a<1000;$a++) {} echo 'a';
Output for 4.3.0 - 5.6.30, hhvm-3.10.1, hhvm-3.13.2, hhvm-3.17.3, 7.0.0 - 7.2.0
a
Output for hhvm-3.11.1 - 3.12.14, hhvm-3.15.4

Process exited with code 137.