protected function now()
    {
        $dt = new DateTime();
        $dt->setTimezone(new DateTimeZone('UTC'));
        return $dt->format(DateTime::ISO8601);
    }
protected function now()
    {
        $dt = new DateTime();
        $dt->setTimezone(new DateTimeZone('UTC'));
        return $dt->format(DateTime::ISO8601);
    }
protected function now ( ) { $ dt = new DateTime ( ) ; $ dt -> setTimezone ( new DateTimeZone ( 'UTC' ) ) ; return $ dt -> format ( DateTime :: ISO8601 ) ; }
Returns current time formatted in ISO-8601 at UTC timezone

@return string
Returns current time formatted in ISO - 8601 at UTC timezone