(PHP 5 >= 5.5.0, PHP 7, PECL >= 3.0.0a1)
IntlCalendar::setFirstDayOfWeek — Set the day on which the week is deemed to start
面向对象风格
$dayOfWeek
) : bool过程化风格
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.
calThe IntlCalendar resource.
dayOfWeek
One of the constants IntlCalendar::DOW_SUNDAY,
IntlCalendar::DOW_MONDAY, ...,
IntlCalendar::DOW_SATURDAY.
Returns TRUE on success. Failure can only happen due to invalid parameters.
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