Adding three months to a date in PHP

Question

I have a variable called $effectiveDate containing the date 2012-03-26.

I am trying to add three months to this date and have been unsuccessful at it.

Here is what I have tried:

$effectiveDate = strtotime("+3 months", strtotime($effectiveDate)); 

and

$effectiveDate = strtotime(date("Y-m-d", strtotime($effectiveDate)) . "+3 months"); 

What am I doing wrong? Neither piece of code worked.

Answer 1

Change it to this will give you the expected format:

$effectiveDate = date('Y-m-d', strtotime("+3 months", strtotime($effectiveDate))); 

Answer 2

This answer is not exactly to this question. But I will add this since this question still searchable for how to add/deduct period from date.

$date = new DateTime('now'); $date->modify('+3 month'); // or you can use '-90 day' for deduct $date = $date->format('Y-m-d h:i:s'); echo $date;