lithium\net\http\Response::_cookies PHP Method

    protected function _cookies()
    {
        $cookies = array();
        foreach ($this->cookies() as $name => $value) {
            if (!isset($value['value'])) {
                foreach ($value as $set) {
                    $cookies[] = compact('name') + $set;
                }
            } else {
                $cookies[] = compact('name') + $value;
            }
        }
        $invalid = str_split(",; \\+\t\r\n\v\f");
        $replace = array_map('rawurlencode', $invalid);
        $replace = array_combine($invalid, $replace);
        foreach ($cookies as &$cookie) {
            if (!is_scalar($cookie['value'])) {
                $message = "Non-scalar value cannot be rendered for cookie `{$cookie['name']}`";
                throw new UnexpectedValueException($message);
            }
            $value = strtr($cookie['value'], $replace);
            $header = $cookie['name'] . '=' . $value;
            if (!empty($cookie['expires'])) {
                if (is_string($cookie['expires'])) {
                    $cookie['expires'] = strtotime($cookie['expires']);
                }
                $header .= '; Expires=' . gmdate('D, d-M-Y H:i:s', $cookie['expires']) . ' GMT';
            }
            if (!empty($cookie['path'])) {
                $header .= '; Path=' . strtr($cookie['path'], $replace);
            }
            if (!empty($cookie['domain'])) {
                $header .= '; Domain=' . strtr($cookie['domain'], $replace);
            }
            if (!empty($cookie['secure'])) {
                $header .= '; Secure';
            }
            if (!empty($cookie['httponly'])) {
                $header .= '; HttpOnly';
            }
            $cookie = $header;
        }
        return $cookies ?: null;
    }