Same name and namespace in other branches
  1. 8.9.x core/lib/Drupal/Core/Datetime/DateHelper.php \Drupal\Core\Datetime\DateHelper::dayOfWeek()
  2. 9 core/lib/Drupal/Core/Datetime/DateHelper.php \Drupal\Core\Datetime\DateHelper::dayOfWeek()

Returns day of week for a given date (0 = Sunday).

Parameters

mixed $date: (optional) A DrupalDateTime object or a date string. Defaults to NULL, which means use the current date.

Return value

int|null The number of the day in the week, or null if the $date has errors.

2 calls to DateHelper::dayOfWeek()
DateHelper::dayOfWeekName in core/lib/Drupal/Core/Datetime/DateHelper.php
Returns translated name of the day of week for a given date.
DateHelperTest::testDayOfWeek in core/tests/Drupal/Tests/Core/Datetime/DateHelperTest.php
@covers ::dayOfWeek

File

core/lib/Drupal/Core/Datetime/DateHelper.php, line 503

Class

DateHelper
Defines Gregorian Calendar date values.

Namespace

Drupal\Core\Datetime

Code

public static function dayOfWeek($date = NULL) {
  $date = $date ?? 'now';
  if (!$date instanceof DrupalDateTime) {
    $date = new DrupalDateTime($date);
  }
  if (!$date
    ->hasErrors()) {
    return $date
      ->format('w');
  }
  return NULL;
}