PHP Manual
IntlCalendar
Set the day on which the week is deemed to start

IntlCalendar::setFirstDayOfWeek

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

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

说明

面向对象风格

public IntlCalendar::setFirstDayOfWeek ( int $dayOfWeek ) : bool

过程化风格

intlcal_set_first_day_of_week ( IntlCalendar $cal , int $dayOfWeek ) : bool

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.

参数

cal: The IntlCalendar resource.
dayOfWeek: One of the constants IntlCalendar::DOW_SUNDAY, IntlCalendar::DOW_MONDAY, …, IntlCalendar::DOW_SATURDAY.

返回值

Returns TRUE on success. Failure can only happen due to invalid parameters.

范例

Example #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";

以上例程会输出：

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