public static function isOnline($lastSeen) { $date1 = date_sub(date_create(MyDate::getNormalDateFormat()), date_interval_create_from_date_string("1 minute")); $check = strtotime(MyDate::getNormalDateFormat()) - strtotime($lastSeen) > 1000 ? false : true; $check ? User::displayOnlineStatus() : ''; }