3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function f($n) { return ($n == 0 || $n == 1) ? $n : f($n-1) + f($n - 2); } echo f(10);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
55