Deprecated: Optional parameter $keys declared before required parameter $cms_id is implicitly treated as a required parameter in /home/www/dev/work/class/blog/CmsKey.php on line 75

Deprecated: Creation of dynamic property lvesu\lvesu\controller\blog\php::$title is deprecated in /home/www/dev/work/website/lvesu/class/controller/blog/php.php on line 28

Deprecated: Creation of dynamic property lvesu\lvesu\controller\blog\php::$outlink is deprecated in /home/www/dev/work/website/lvesu/template/blog/cms/php.manual.tpl on line 2

Deprecated: Creation of dynamic property lvesu\lvesu\controller\blog\php::$status is deprecated in /home/www/dev/work/website/lvesu/template/blog/index.head.php on line 2
PHP - Manual: IntlCalendar::inDaylightTime - 互联网笔记

略微加速

PHP官方手册 - 互联网笔记

PHP - Manual: IntlCalendar::inDaylightTime

2025-05-04

IntlCalendar::inDaylightTime

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

IntlCalendar::inDaylightTimeWhether the objectʼs time is in Daylight Savings Time

说明

面向对象风格

public IntlCalendar::inDaylightTime(): bool

过程化风格

intlcal_in_daylight_time(IntlCalendar $calendar): bool

Whether, for the instant represented by this object and for this objectʼs timezone, daylight saving time is in place.

参数

calendar

IntlCalendar 实例。

返回值

Returns true if the date is in Daylight Savings Time, false otherwise.

On failure false is also returned. To detect error conditions use intl_get_error_code(), or set up Intl to throw exceptions.

示例

示例 #1 IntlCalendar::inDaylightTime()

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

$cal = new IntlGregorianCalendar(2013, 6 /* July */, 1, 4, 56, 31);
var_dump($cal->inDaylightTime()); // true
$cal->set(IntlCalendar::FIELD_MONTH, 11 /* December */);
var_dump($cal->inDaylightTime()); // false

//DST end transition on 2013-10-27 at 0200 (wall time back 1 hour)
$cal = new IntlGregorianCalendar(2013, 9 /* October */, 27, 1, 30, 0);

var_dump($cal->inDaylightTime()); // false (default WALLTIME_LAST)

$cal->setRepeatedWallTimeOption(IntlCalendar::WALLTIME_FIRST);
$cal->set(IntlCalendar::FIELD_HOUR_OF_DAY, 1); // force time recalculation
var_dump($cal->inDaylightTime()); // true
添加备注

用户贡献的备注

此页面尚无用户贡献的备注。

官方地址:https://www.php.net/manual/en/intlcalendar.indaylighttime.php

冷却塔厂家 广告
中文GPT4.0无需注册 广告
北京半月雨文化科技有限公司.版权所有 京ICP备12026184号-3