PHP - Manual: DateTimeZone

2024-04-27

DateTimeZone::__construct »

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The DateTimeZone class

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

简介

Representation of time zone.

类摘要

class DateTimeZone {

/* 常量 */

const int AFRICA = 1;

const int AMERICA = 2;

const int ANTARCTICA = 4;

const int ARCTIC = 8;

const int ASIA = 16;

const int ATLANTIC = 32;

const int AUSTRALIA = 64;

const int EUROPE = 128;

const int INDIAN = 256;

const int PACIFIC = 512;

const int UTC = 1024;

const int ALL = 2047;

const int ALL_WITH_BC = 4095;

const int PER_COUNTRY = 4096;

/* 方法 */

public __construct(string $timezone)

public getLocation(): array

public getName(): string

public getOffset(DateTime $datetime): int

public getTransitions(int $timestampBegin = PHP_INT_MIN, int $timestampEnd = PHP_INT_MAX): array|false

public static listAbbreviations(): array

public static listIdentifiers(int $what = DateTimeZone::ALL, string $country = null): array

}

预定义常量

DateTimeZone::AFRICA: Africa time zones.
DateTimeZone::AMERICA: America time zones.
DateTimeZone::ANTARCTICA: Antarctica time zones.
DateTimeZone::ARCTIC: Arctic time zones.
DateTimeZone::ASIA: Asia time zones.
DateTimeZone::ATLANTIC: Atlantic time zones.
DateTimeZone::AUSTRALIA: Australia time zones.
DateTimeZone::EUROPE: Europe time zones.
DateTimeZone::INDIAN: Indian time zones.
DateTimeZone::PACIFIC: Pacific time zones.
DateTimeZone::UTC: UTC time zones.
DateTimeZone::ALL: All time zones.
DateTimeZone::ALL_WITH_BC: All time zones including backwards compatible.
DateTimeZone::PER_COUNTRY: Time zones per country.

DateTimeZone::__construct — 创建新的DateTimeZone对象
DateTimeZone::getLocation — 返回与时区相关的定位信息。
DateTimeZone::getName — 返回时区名称。
DateTimeZone::getOffset — 返回相对于 GMT 的时差。
DateTimeZone::getTransitions — Returns all transitions for the timezone
DateTimeZone::listAbbreviations — 返回一个包含 dst (夏令时)，时差和时区信息的关联数组。
DateTimeZone::listIdentifiers — 返回一个包含了所有时区标示符的索引数组。

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User Contributed Notes 2 notes

down

bradm at inmotionhosting dot com ¶

4 years ago


Seems like a significant differences between php 5.3 and 5.6:

php -r "new DateTimeZone( '-0400' );"
-------------                        --------------
- PHP 5.3.3 -                        - PHP 5.6.30 -
-------------                        --------------
DateTimeZone::__construct():        Works as expected.
Unknown or bad timezone (-0400)

php -r '$tz = new DateTimeZone( "EDT" ); echo $tz->getName();';
-------------                        --------------
- PHP 5.3.3 -                        - PHP 5.6.30 -
-------------                        --------------
America/New_York                    EDT

php -r '$tz = new DateTimeZone( "EDT" ); echo $tz->getName();';
-------------                        --------------
- PHP 5.3.3 -                        - PHP 5.6.30 -
-------------                        --------------
DateTimeZone Object                DateTimeZone Object
(                                    (
)                                    [timezone_type] => 2
                                    [timezone] => EDT
                                    )

down

-38

ryan at amst dot com ¶

6 years ago


It seems like as of PHP 5.5, creating a new DateTimeZone with a string like 'EDT' will cause DateTimeZone::getName() to return 'EDT' whereas prior to 5.5 it would convert it would have returned 'America/New_York'

This is of particular note when using a DateTimeZone object to change the timezone on a DateTime object.  Using a DateTimeZone object when set as shown above will cause the conversion to be wrong without throwing any errors.

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官方地址：https://www.php.net/manual/en/class.datetimezone.php

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PHP官方手册 - 互联网笔记

The DateTimeZone class

简介

类摘要

预定义常量

目录

User Contributed Notes 2 notes