TijsVerkoyen\Twitter\Twitter::doOAuthCall PHP Method

    protected function doOAuthCall($method, array $parameters = null)
    {
        // redefine
        $method = (string) $method;
        // append default parameters
        $parameters['oauth_consumer_key'] = $this->getConsumerKey();
        $parameters['oauth_nonce'] = md5(microtime() . rand());
        $parameters['oauth_timestamp'] = time();
        $parameters['oauth_signature_method'] = 'HMAC-SHA1';
        $parameters['oauth_version'] = '1.0';
        // calculate the base string
        $base = $this->calculateBaseString(self::SECURE_API_URL . '/oauth/' . $method, 'POST', $parameters);
        // add sign into the parameters
        $parameters['oauth_signature'] = $this->hmacsha1($this->getConsumerSecret() . '&' . $this->getOAuthTokenSecret(), $base);
        // calculate header
        $header = $this->calculateHeader($parameters, self::SECURE_API_URL . '/oauth/' . $method);
        // set options
        $options[CURLOPT_URL] = self::SECURE_API_URL . '/oauth/' . $method;
        $options[CURLOPT_PORT] = self::SECURE_API_PORT;
        $options[CURLOPT_USERAGENT] = $this->getUserAgent();
        if (ini_get('open_basedir') == '' && ini_get('safe_mode' == 'Off')) {
            $options[CURLOPT_FOLLOWLOCATION] = true;
        }
        $options[CURLOPT_RETURNTRANSFER] = true;
        $options[CURLOPT_TIMEOUT] = (int) $this->getTimeOut();
        $options[CURLOPT_SSL_VERIFYPEER] = false;
        $options[CURLOPT_SSL_VERIFYHOST] = false;
        $options[CURLOPT_HTTPHEADER] = array('Expect:');
        $options[CURLOPT_POST] = true;
        $options[CURLOPT_POSTFIELDS] = $this->buildQuery($parameters);
        // init
        $this->curl = curl_init();
        // set options
        curl_setopt_array($this->curl, $options);
        // execute
        $response = curl_exec($this->curl);
        $headers = curl_getinfo($this->curl);
        // fetch errors
        $errorNumber = curl_errno($this->curl);
        $errorMessage = curl_error($this->curl);
        // error?
        if ($errorNumber != '') {
            throw new Exception($errorMessage, $errorNumber);
        }
        // init var
        $return = array();
        // parse the string
        parse_str($response, $return);
        // return
        return $return;
    }