public function getHeader()
    {
        if (is_null($this->header)) {
            $host = $this->getHost();

            $header = array();
            $header[] = 'POST /cgi-bin/webscr HTTP/1.1';
            $header[] = 'Content-Type: application/x-www-form-urlencoded';
            if (isset($host)) {
                $header[] = 'Host: ' . $host;
            }
            $header[] = 'Connection: close';

            $this->setHeader($header);
        }

        return $this->header;
    }