NTLMSoapClient::__doRequest PHP Method

    public function __doRequest($request, $location, $action, $version, $one_way = 0)
    {
        $headers = array('Method: POST', 'Connection: Keep-Alive', 'User-Agent: PHP-SOAP-CURL', 'Content-Type: text/xml; charset=utf-8', 'SOAPAction: "' . $action . '"');
        $this->__last_request_headers = $headers;
        $ch = curl_init($location);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $request);
        curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
        curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_NTLM | CURLAUTH_BASIC);
        curl_setopt($ch, CURLOPT_USERPWD, $this->username . ':' . $this->password);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        $ewsResponse = curl_exec($ch);
        // Absolutely stupid hack necessary to get around Microsoft invalid XML response that
        // occurs every once in a while
        // http://social.technet.microsoft.com/Forums/pl-PL/exchangesvrdevelopment/thread/a58d4400-12d5-4856-91c7-c6135035e147
        $ewsResponse = str_replace('""', '""', $ewsResponse);
        return $ewsResponse;
    }