public function getURLQuery()
    {
        $qstr = '?';

        $params = $this->getParametersArray();

        $paramCount = count($params);
        $i = 0;
        foreach ($params as $key => $value) {
            if ($value === null) {
                continue;
            }

            $qstr .= $key . '=' . rawurlencode($value);

            if ($i < $paramCount - 1) {
                $qstr .= '&';
            }

            $i++;
        }

        return $qstr;
    }