Similar PASTEBIN : Expired Date

function dateFromDays($dateStart,$days) {
        // Convert $dateStart to timestamp
        $dateStartArray = explode("-",$dateStart);

        $startYear = $dateStartArray[0];
        $startMonth = $dateStartArray[1];
        $startDay = $dateStartArray[2];

        $initTimeStamp = mktime(12,0,0,$startMonth,$startDay,$startYear);
        $endTimeStamp  = $initTimeStamp + ($days*60*60*24);

        // Convert $endTimeStamp to date
        $dateEnd = date('Y-m-d',$endTimeStamp);

        return $dateEnd;
}