/**
  * This function resets all environment variables, like headers from old response.
  *
  * @author David Pauli <*****@*****.**>
  * @since 0.2.1
  */
 public static function resetLastResponse()
 {
     self::unsetCookies();
     self::$CONTENT = null;
     self::$CONTENT_TYPE = null;
     self::$DATE = null;
     self::$HTTP_RESPONSE_CODE = 0;
 }