PHP - Add one week to a user defined date [duplicate]

Question

There's more than likely going to be a duplicate for this question, but I'm struggling to find a precise answer for my problem.

The user enters a starting date for a client's rent (on a form on a previous page), then it needs to generate the next date (one week later) that the client is required to pay. For example:

$start_date = $_POST['start_date'];  
$date_to_pay = ???  

Lets say the user enters in 2015/03/02:

$start_date = "2015/03/02";  

I then want the date to pay to be equal to a week later (2015/03/09):

$date_to_pay = "2015/03/09";  

How would one go around doing this? Many thanks.

Answer 1

You can use this:

$startdate = $_POST['start_date'];
$date_to_pay = date('Y/m/d',strtotime('+1 week',$startdate));