Online PHP editor | refs for NTk9q

@ 2015-09-28T16:49:14Z

<?php

function fibonacci($n,$first = 0,$second = 1)
{
    $fib = [$first,$second];
    
    for($i=1;$i<$n;$i++)
    {
        $fib[] = $fib[$i]+$fib[$i-1];
    }
    
    return array_pop($fib);
}

echo fibonacci(40);