Add 30 days for date in db

Question

I have publish up date and publish down date in my DB. Currently they are both same dates.

How do I change it (during mysql insert) so publish down date is 30 days past publish up date.

I am using $pubDate

Thanks

Answer 1

You can use DATE_ADD():

DATE_ADD(my_date, INTERVAL 30 DAY)

Answer 2

in php, before inserting you can use strtotime(): if the publishDown date is a timestamp:

$publishDown = strtotime("+30 days",$publishDown);

otherwise you may have to use mktime to get it in the right format