Quote overflow

Sorry another bbcode glitch not serious thought so i'm not sure if its worth fixing, (although i guess it could be easily fixed with a loop that keeps going until no more overflows are found)

        else if ($overflow)
            // The quote depth level was too high, so we strip out the inner most quote(s)
            $text = substr($text, 0, $overflow[0]).substr($text, $overflow[1], (strlen($text) - $overflow[0]));

only the last overflowing quote block is returned e.g.