What is best solution to get next and previous month from given date php

Question

I want to get next and previous month from given date. this is my code.

$month = '2011-01-20';

$prevMOnth = funP($month); $nextMonth = funN($month);

what is best solution to do that.

Answer 1

$next_month_ts = strtotime('2011-01-20 +1 month');
$prev_month_ts = strtotime('2011-01-20 -1 month');

$next_month = date('Y-m-d', $next_month_ts);
$prev_month = date('Y-m-d', $prev_month_ts);

Answer 2

Code mentioned before might not work in the end of months with 31 day (or March): $prev_month_ts = strtotime('2011-01-20 -1 month');

This is a best solution to get name of previous month. Get this month first day's date, then subtract 1 day, then get month name:

date('F', strtotime('-1 day', strtotime(date('Y-m-01'))));

And get name of next month. Get this month last day's date, then add 1 day, then get month name:

date('F', strtotime('+1 day', strtotime(date('Y-m-t'))));