Piwik\Plugins\SitesManager\API::checkValidTimezone PHP Метод

    private function checkValidTimezone($timezone)
    {
        $timezones = $this->getTimezonesList();
        foreach (array_values($timezones) as $cities) {
            foreach ($cities as $timezoneId => $city) {
                if ($timezoneId == $timezone) {
                    return true;
                }
            }
        }
        throw new Exception(Piwik::translate('SitesManager_ExceptionInvalidTimezone', array($timezone)));
    }