private function somaDia($qtdDias)
    {
        $somaDia = $qtdDias;
        if ($qtdDias > 0) {
            $somaDia = "+$qtdDias";
        }
        $ts = strtotime("$somaDia day", $this->ts);

        return $ts;
    }
private function somaDia($qtdDias)
    {
        $somaDia = $qtdDias;
        if ($qtdDias > 0) {
            $somaDia = "+$qtdDias";
        }
        $ts = strtotime("$somaDia day", $this->ts);

        return $ts;
    }
private function somaDia ( $ qtdDias ) { $ somaDia = $ qtdDias ; if ( $ qtdDias > 0 ) { $ somaDia = "+$qtdDias" ; } $ ts = strtotime ( "$somaDia day" , $ this -> ts ) ; return $ ts ; }
Soma dias.

@param  integer $qtdDias
@return integer Timestamp
Soma dias .