function date_calc_date_to_days in Date 6.2

Same name and namespace in other branches

1. 5.2 date_php4/date_php4_calc.inc \date_calc_date_to_days()
2. 6 date_php4/date_php4_calc.inc \date_calc_date_to_days()

Converts a date to number of days since a distant unspecified epoch

Parameters

int $day: The day of the month.

int $month: The month.

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

Return value

integer The number of days since the date_calc epoch.

14 calls to date_calc_date_to_days()

date_calc_begin_of_next_week in date_php4/date_php4_calc.inc

Find the month day of the beginning of week after given date, using variable_get('date_first_day', 1). Can return weekday of next month.

date_calc_begin_of_prev_week in date_php4/date_php4_calc.inc

Find the month day of the beginning of week before given date, using variable_get('date_first_day', 1). Can return weekday of prev month.

date_calc_begin_of_week in date_php4/date_php4_calc.inc

Find the month day of the beginning of week for given date, using variable_get('date_first_day', 1). Can return weekday of prev month.

date_calc_compare_dates in date_php4/date_php4_calc.inc

Compares two dates

date_calc_date_diff in date_php4/date_php4_calc.inc

Returns number of days between two given dates

... See full list

File

date_php4/date_php4_calc.inc, line 199

Code

function date_calc_date_to_days($day, $month, $year) {
  $century = (int) drupal_substr($year, 0, 2);
  $year = (int) drupal_substr($year, 2, 2);
  if ($month > 2) {
    $month -= 3;
  }
  else {
    $month += 9;
    if ($year) {
      $year--;
    }
    else {
      $year = 99;
      $century--;
    }
  }
  return floor(146097 * $century / 4) + floor(1461 * $year / 4) + floor((153 * $month + 2) / 5) + $day + 1721119;
}