code: public function setPort($value)
      {
          if ($value != $this->_port) {
              $this->_port = (int) $value;
              $this->_hostInfo = null;
          }
      }
docs: Sets the port to use for insecure requests.
  This setter is provided in case a custom port is necessary for certain
  server configurations.
  @param int $value port number.