code: protected static function getRequestMethodName()
      {
          $request_engine = self::$requestEngine;
  
          if ($request_engine == 'curl' && !function_exists('curl_init')) {
              trigger_error("DetectLanguage::Client - CURL not found, switching to stream");
              $request_engine = self::$requestEngine = 'stream';
          }
  
          switch ($request_engine) {
              case 'curl':
                  return 'requestCurl';
  
              case 'stream':
                  return 'requestStream';
  
              default:
                  throw new Error("Invalid request engine: " . $request_engine);
          }
      }
docs: Get request method name.
  
  @return string