Recurly_Client::_sendRequest PHP Method

    private function _sendRequest($method, $uri, $data = '')
    {
        if (function_exists('mb_internal_encoding')) {
            mb_internal_encoding(self::DEFAULT_ENCODING);
        }
        if (substr($uri, 0, 4) != 'http') {
            $uri = $this->baseUri() . $uri;
        }
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $uri);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
        if (self::$CACertPath) {
            curl_setopt($ch, CURLOPT_CAINFO, self::$CACertPath);
        }
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, FALSE);
        curl_setopt($ch, CURLOPT_MAXREDIRS, 1);
        curl_setopt($ch, CURLOPT_HEADER, TRUE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
        curl_setopt($ch, CURLOPT_TIMEOUT, 45);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/xml; charset=utf-8', 'Accept: application/xml', Recurly_Client::__userAgent(), 'Accept-Language: ' . $this->_acceptLanguage, 'X-Api-Version: ' . Recurly_Client::$apiVersion));
        curl_setopt($ch, CURLOPT_USERPWD, $this->apiKey());
        if ('POST' == $method) {
            curl_setopt($ch, CURLOPT_POST, TRUE);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
        } else {
            if ('PUT' == $method) {
                curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PUT');
                curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
            } else {
                if ('GET' != $method) {
                    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
                }
            }
        }
        $response = curl_exec($ch);
        if ($response === false) {
            $errorNumber = curl_errno($ch);
            $message = curl_error($ch);
            curl_close($ch);
            $this->_raiseCurlError($errorNumber, $message);
        }
        $statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        list($header, $body) = explode("\r\n\r\n", $response, 2);
        // Larger responses end up prefixed by "HTTP/1.1 100 Continue\r\n\r\n" which
        // needs to be discarded.
        if (strpos($header, " 100 Continue") !== false) {
            list($header, $body) = explode("\r\n\r\n", $body, 2);
        }
        $headers = $this->_getHeaders($header);
        return new Recurly_ClientResponse($statusCode, $headers, $body);
    }