Set the day on which the week is deemed to start

# IntlCalendar::setFirstDayOfWeek

(PHP 5 >= 5.5.0, PHP 7, PHP 8, PECL >= 3.0.0a1)

IntlCalendar::setFirstDayOfWeek — Set the day on which the week is deemed to start

### Beschreibung

Objektorientierter Stil

public function IntlCalendar::setFirstDayOfWeek(int `$dayOfWeek`): true

Prozeduraler Stil

function intlcal_set_first_day_of_week(IntlCalendar `$calendar`, int `$dayOfWeek`): true

Defines the day of week deemed to start the week. This affects the behavior of fields that depend on the concept of week start and end such as `IntlCalendar::FIELD_WEEK_OF_YEAR` and `IntlCalendar::FIELD_YEAR_WOY`.

### Parameter-Liste

`calendar`

  Eine IntlCalendar-Instanz.

`dayOfWeek`

  One of the constants `IntlCalendar::DOW_SUNDAY`, `IntlCalendar::DOW_MONDAY`, …, `IntlCalendar::DOW_SATURDAY`.

### Rückgabewerte

Gibt immer `true` zurück.

### Changelog

Version | Beschreibung
--- | ---
8.2.0 | Der Rückgabewert ist nun `true` vorher war es bool.

### Beispiele

Beispiel #1 IntlCalendar::setFirstDayOfWeek()

    <?php
    ini_set('date.timezone', 'Europe/Lisbon');
    ini_set('intl.default_locale', 'es_ES');

    $cal = IntlCalendar::createInstance();
    $cal->set(2013, 5 /* June */, 30); // A Sunday

    var_dump($cal->getFirstDayOfWeek()); // 2 (Monday)

    echo IntlDateFormatter::formatObject($cal, <<<EOD
    'local day of week: 'cc'
    week of month    : 'W'
    week of year     : 'ww
    EOD
    ), "\n";

    $cal->setFirstDayOfWeek(IntlCalendar::DOW_SUNDAY);

    echo IntlDateFormatter::formatObject($cal, <<<EOD
    'local day of week: 'cc'
    week of month    : 'W'
    week of year     : 'ww
    EOD
    ), "\n";

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

    int(2)
    local day of week: 7
    week of month    : 4
    week of year     : 26
    local day of week: 1
    week of month    : 5
    week of year     : 27

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