Fibonnaci.php

<?php
function fbn($count) {
    $before = 0;
    $after = 1;

    for ($i = 0; $i < $count; $i++) {
        if ($before < 1 && $after < 2) {
            $buff[] = $before;
            $buff[] = $after;
        }

        $fn = $after + $before;
        $before = $after;
        $after  = $fn;
        $buff[] = $fn;
    }
    return $buff;
}
print_r(fbn(10));