function date_week in Date 7.3

Same name and namespace in other branches

1. 5.2 date_api.module \date_week()
2. 6.2 date_api.module \date_week()
3. 6 date_api.module \date_week()
4. 7 date_api/date_api.module \date_week()
5. 7.2 date_api/date_api.module \date_week()

The calendar week number for a date.

PHP week functions return the ISO week, not the calendar week.

Parameters

string $date: A date string in the format Y-m-d.

Return value

int The calendar week number.

5 calls to date_week()

DateApiTestCase::testDateApi in date_api/tests/DateApiTestCase.test

Test date_format_date().

date_views_argument_handler_simple::get_default_argument in date_views/includes/date_views_argument_handler_simple.inc

Set the empty argument value to the current date.

date_views_plugin_pager::query in date_views/includes/date_views_plugin_pager.inc

Modify the query for paging

date_weeks_in_year in date_api/date_api.module

The number of calendar weeks in a year.

template_preprocess_date_views_pager in date_views/theme/theme.inc

Preprocess function for Date pager template.

File

date_api/date_api.module, line 2208

This module will make the date API available to other modules.

Code

function date_week($date) {
  $date = substr($date, 0, 10);
  $parts = explode('-', $date);
  $date = new DateObject($date . ' 12:00:00', 'UTC');

  // If we are using ISO weeks, this is easy.
  if (variable_get('date_api_use_iso8601', FALSE)) {
    return intval($date
      ->format('W'));
  }
  $year_date = new DateObject($parts[0] . '-01-01 12:00:00', 'UTC');
  $week = intval($date
    ->format('W'));
  $year_week = intval(date_format($year_date, 'W'));
  $date_year = intval($date
    ->format('o'));

  // Remove the leap week if it's present.
  if ($date_year > intval($parts[0])) {
    $last_date = clone $date;
    date_modify($last_date, '-7 days');
    $week = date_format($last_date, 'W') + 1;
  }
  elseif ($date_year < intval($parts[0])) {
    $week = 0;
  }
  if ($year_week != 1) {
    $week++;
  }

  // Convert to ISO-8601 day number, to match weeks calculated above.
  $iso_first_day = 1 + (variable_get('date_first_day', 0) + 6) % 7;

  // If it's before the starting day, it's the previous week.
  if (intval($date
    ->format('N')) < $iso_first_day) {
    $week--;
  }

  // If the year starts before, it's an extra week at the beginning.
  if (intval(date_format($year_date, 'N')) < $iso_first_day) {
    $week++;
  }
  return $week;
}