Get the first day of the week for the calendarʼs locale

# IntlCalendar::getFirstDayOfWeek

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

IntlCalendar::getFirstDayOfWeek — Get the first day of the week for the calendarʼs locale

### 説明

オブジェクト指向型

public IntlCalendar::getFirstDayOfWeek ( void ) : int

手続き型

intlcal_get_first_day_of_week ( IntlCalendar `$cal` ) : int

The week day deemed to start a week, either the default value for this locale or the value set with IntlCalendar::setFirstDayOfWeek().

### パラメータ

`cal`

  The IntlCalendar resource.

### 返り値

One of the constants `IntlCalendar::DOW_SUNDAY`, `IntlCalendar::DOW_MONDAY`, …, `IntlCalendar::DOW_SATURDAY`失敗した場合に `FALSE` を返します.

### 例

例1 IntlCalendar::getFirstDayOfWeek()

`<?php
ini_set('date.timezone', 'UTC');
$cal1 = IntlCalendar::createInstance(NULL, 'es_ES');
var_dump($cal1->getFirstDayOfWeek()); // Monday
$cal1->set(2013, 1 /* February */, 3); // a Sunday
var_dump($cal1->get(IntlCalendar::FIELD_WEEK_OF_YEAR)); // 5
$cal2 = IntlCalendar::createInstance(NULL, 'en_US');
var_dump($cal2->getFirstDayOfWeek()); // Sunday
$cal2->set(2013, 1 /* February */, 3); // a Sunday
var_dump($cal2->get(IntlCalendar::FIELD_WEEK_OF_YEAR)); // 6`

上の例の出力は以下となります。

    int(2)
    int(5)
    int(1)
    int(6)

### 参考

- IntlCalendar::setFirstDayOfWeek() - Set the day on which the week is deemed to start