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 unsu

Answer 1

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;