Weighted Random Script

[Mgccl]

/*
        Weighted Random Ver 1.0 by Mgccl([e-mail])
        Useage: input an numbered array
        $array[$i][’s’] is the string you want to return
        $array[$i][’w'] is the weight of the string
        you can allow the function to find the GCD
        sometimes it speeds up the script
        To use GCD, use the function like
        rand_string_pro($array, true);

    Note: You need the math functions I wrote in
    order to use GCD, you can find them here:
    [url]http://www.webdevlogs.com/2006/11/21/some-math-functions/[/url]
    */
function rand_string_pro($seed, $gcd = false){
        $count = count($seed);
        if($gcd === true){
                foreach($seed as $var){
                        $gcd_array[] = $var[‘w’];
                }
                $gcd = math_gcd_array($gcd_array);
                if($gcd != 1){
                        $i = 0;
                        while($i < $count){
                                $seed[$i][‘w’] /= $gcd;
                                ++$i;
                        }
                }
                unset($gcd, $gcd_array);
        }

    $i = 0;
    while($i < $count){
            $n = 0;
            while($n < $seed[$i][‘w’]){
                    $key[] = $i;
                    ++$n;
            }
            ++$i;
    }
    return $seed[$key[mt_rand(0, count($key)-1)]][’s’];
}

Tell me what do you think, this should be the fastest weighted random script 🙂