Cake\Network\Response::cookie PHP Method

    public function cookie($options = null)
    {
        if ($options === null) {
            return $this->_cookies;
        }
        if (is_string($options)) {
            if (!isset($this->_cookies[$options])) {
                return null;
            }
            return $this->_cookies[$options];
        }
        $defaults = ['name' => 'CakeCookie[default]', 'value' => '', 'expire' => 0, 'path' => '/', 'domain' => '', 'secure' => false, 'httpOnly' => false];
        $options += $defaults;
        $this->_cookies[$options['name']] = $options;
    }

 /**
  * Set the cookie in the response.
  *
  * Also sets the request->params['_csrfToken'] so the newly minted
  * token is available in the request data.
  *
  * @param \Cake\Network\Request $request The request object.
  * @param \Cake\Network\Response $response The response object.
  * @return void
  */
 protected function _setCookie(Request $request, Response $response)
 {
     $expiry = new Time($this->_config['expiry']);
     $value = hash('sha512', Security::randomBytes(16), false);
     $request->params['_csrfToken'] = $value;
     $response->cookie(['name' => $this->_config['cookieName'], 'value' => $value, 'expire' => $expiry->format('U'), 'path' => $request->webroot, 'secure' => $this->_config['secure'], 'httpOnly' => $this->_config['httpOnly']]);
 }