3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function fibo_r($n){ return(($n < 2) ? 1 : fibo_r($n - 2) + fibo_r($n - 1)); } fibo_r(4);
based on 3pdua
Output for 4.3.0 - 7.2.0