Timestamps of start and end of month

Question

How can one get the timestamps of the first and last minutes of any month using PHP?

Answer 1

Use mktime for generating timestamps from hour/month/day/... values and cal_days_in_month to get the number of days in a month:

$month = 1; $year = 2011;
$firstMinute = mktime(0, 0, 0, $month, 1, $year);
$days = cal_days_in_month(CAL_GREGORIAN, $month, $year);
$lastMinute = mktime(23, 59, 0, $month, $days, $year);