3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function fib($n){ if ($n == 1 || $n == 2){ return 1; } return fib($n -1) + fib($n - 2); } fib(5);
based on GOFe7
Output for 4.3.0 - 7.1.0