3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function fib($n, $all=0){ $f[0] = 1; $f[1] = 1; for($i = 2; $i<= $n; $i++) $f[$i] = $f[$i-1]+$f[$i-2]; if($all) return $f; return $f[$n]; } print fib(5); var_dump(fib(5, 1));
based on 9VrmE
Output for 4.3.0 - 7.1.0
8array(6) { [0]=> int(1) [1]=> int(1) [2]=> int(2) [3]=> int(3) [4]=> int(5) [5]=> int(8) }