3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function recursion($a) { if ($a < 20) { echo "$a\n"; recursion($a + 1); } } ?>
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.21.0, 7.0.0 - 7.2.0