buki\Pdox::orderBy PHP Method

    public function orderBy($orderBy, $order_dir = null)
    {
        if (!is_null($order_dir)) {
            $this->orderBy = $orderBy . ' ' . strtoupper($order_dir);
        } else {
            if (stristr($orderBy, ' ') || $orderBy == 'rand()') {
                $this->orderBy = $orderBy;
            } else {
                $this->orderBy = $orderBy . ' ASC';
            }
        }
        return $this;
    }