function date_calc_days_in_month in Date 6

Same name and namespace in other branches

1. 5.2 date_php4/date_php4_calc.inc \date_calc_days_in_month()
2. 6.2 date_php4/date_php4_calc.inc \date_calc_days_in_month()

Find the number of days in the given month.

Parameters

int $month: The month.

int $year: The 4 digit year. Do not add leading 0's for years prior to 1000.

Return value

int The number of days the month has.

5 calls to date_calc_days_in_month()

date_calc_end_of_month_by_span in date_php4/date_php4_calc.inc

Returns date of the last day of the month in the number of months from the given date.

date_calc_get_calendar_month in date_php4/date_php4_calc.inc

Return a set of arrays to construct a calendar month for the given date.

date_calc_n_weekday_of_month in date_php4/date_php4_calc.inc

Calculates the date of the Nth weekday of the month, such as the second Saturday of January 2000

date_calc_weeks_in_month in date_php4/date_php4_calc.inc

Returns the number of rows on a calendar month. Useful for determining the number of rows when displaying a typical month calendar.

date_php4.inc in date_php4/date_php4.inc

File

date_php4/date_php4_calc.inc, line 662

Code

function date_calc_days_in_month($month = 0, $year = 0) {
  if (empty($year)) {
    $year = date_calc_get_year();
  }
  if (empty($month)) {
    $month = date_calc_get_month();
  }
  if ($year == 1582 && $month == 10) {
    return 21;

    // October 1582 only had 1st-4th and 15th-31st
  }
  if ($month == 2) {
    if (date_is_leap_year($year)) {
      return 29;
    }
    else {
      return 28;
    }
  }
  elseif ($month == 4 or $month == 6 or $month == 9 or $month == 11) {
    return 30;
  }
  else {
    return 31;
  }
}