3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function make($std) { if ($std < 0) return -1; if(($std == 0) || ($std == 1)) return $std; return make($std - 1) + make($std - 2); } for ($i = 1; $i < 20; ++$i){ echo make($i); echo " "; } ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1597 2584 4181