DateTimeZone::listIdentifiers

timezone_identifiers_list

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

DateTimeZone::listIdentifiers -- timezone_identifiers_list — 返回包含了所有时区标识符的数字索引数组

说明

面向对象风格

public static DateTimeZone::listIdentifiers(int $timezoneGroup = DateTimeZone::ALL, ?string $countryCode = null): array

过程化风格

timezone_identifiers_list(int $timezoneGroup = DateTimeZone::ALL, ?string $countryCode = null): array

参数

timezoneGroup: DateTimeZone 类中的常量之一（或组合）。
countryCode: 国家代码，兼容 ISO 3166-1 的两个大写字母。

注意: 只有当 timezoneGroup 设置为 DateTimeZone::PER_COUNTRY 时,该选项才会被使用。

返回值

返回时区标识符的数组。只会返回没有过时的元素。要获取包含过时时区标识符的所有元素，使用 DateTimeZone::ALL_WITH_BC 作为 timezoneGroup 的值。

更新日志

版本	说明
8.0.0	在此版本之前，失败时返回 `false`。
7.1.0	现在，`countryCode` 可以为 null。

示例

示例 #1 timezone_identifiers_list() 范例

<?php
$timezone_identifiers = DateTimeZone::listIdentifiers();
for ($i=0; $i < 5; $i++) {
    echo "$timezone_identifiers[$i]\n";
}
?>

以上示例的输出类似于：

Africa/Abidjan
Africa/Accra
Africa/Addis_Ababa
Africa/Algiers
Africa/Asmara

示例 #2 列出指定区域的标识符

<?php
$timezone_identifiers = DateTimeZone::listIdentifiers( DateTimeZone::ASIA );
for ($i=0; $i < 5; $i++) {
    echo "$timezone_identifiers[$i]\n";
}
?>

以上示例的输出类似于：

Asia/Aden
Asia/Almaty
Asia/Amman
Asia/Anadyr
Asia/Aqtau

示例 #3 列出多个区域的标识符

<?php
$timezone_identifiers = DateTimeZone::listIdentifiers( DateTimeZone::ASIA | DateTimeZone::PACIFIC );
echo join( ', ', $timezone_identifiers );
?>

以上示例的输出类似于：

Asia/Aden, Asia/Almaty, Asia/Amman, Asia/Anadyr, Asia/Aqtau, Asia/Aqtobe,
Asia/Ashgabat, Asia/Atyrau, Asia/Baghdad, Asia/Bahrain, Asia/Baku,
Asia/Bangkok, Asia/Barnaul, Asia/Beirut, Asia/Bishkek, Asia/Brunei,
Asia/Chita, Asia/Choibalsan, Asia/Colombo, Asia/Damascus, Asia/Dhaka,
Asia/Dili, Asia/Dubai, Asia/Dushanbe, Asia/Famagusta, Asia/Gaza, Asia/Hebron,
Asia/Ho_Chi_Minh, Asia/Hong_Kong, Asia/Hovd, Asia/Irkutsk, Asia/Jakarta,
Asia/Jayapura, Asia/Jerusalem, Asia/Kabul, Asia/Kamchatka, Asia/Karachi,
Asia/Kathmandu, Asia/Khandyga, Asia/Kolkata, Asia/Krasnoyarsk,
Asia/Kuala_Lumpur, Asia/Kuching, Asia/Kuwait, Asia/Macau, Asia/Magadan,
Asia/Makassar, Asia/Manila, Asia/Muscat, Asia/Nicosia, Asia/Novokuznetsk,
Asia/Novosibirsk, Asia/Omsk, Asia/Oral, Asia/Phnom_Penh, Asia/Pontianak,
Asia/Pyongyang, Asia/Qatar, Asia/Qostanay, Asia/Qyzylorda, Asia/Riyadh,
Asia/Sakhalin, Asia/Samarkand, Asia/Seoul, Asia/Shanghai, Asia/Singapore,
Asia/Srednekolymsk, Asia/Taipei, Asia/Tashkent, Asia/Tbilisi, Asia/Tehran,
Asia/Thimphu, Asia/Tokyo, Asia/Tomsk, Asia/Ulaanbaatar, Asia/Urumqi,
Asia/Ust-Nera, Asia/Vientiane, Asia/Vladivostok, Asia/Yakutsk, Asia/Yangon,
Asia/Yekaterinburg, Asia/Yerevan, Pacific/Apia, Pacific/Auckland,
Pacific/Bougainville, Pacific/Chatham, Pacific/Chuuk, Pacific/Easter,
Pacific/Efate, Pacific/Fakaofo, Pacific/Fiji, Pacific/Funafuti,
Pacific/Galapagos, Pacific/Gambier, Pacific/Guadalcanal, Pacific/Guam,
Pacific/Honolulu, Pacific/Kanton, Pacific/Kiritimati, Pacific/Kosrae,
Pacific/Kwajalein, Pacific/Majuro, Pacific/Marquesas, Pacific/Midway,
Pacific/Nauru, Pacific/Niue, Pacific/Norfolk, Pacific/Noumea,
Pacific/Pago_Pago, Pacific/Palau, Pacific/Pitcairn, Pacific/Pohnpei,
Pacific/Port_Moresby, Pacific/Rarotonga, Pacific/Saipan, Pacific/Tahiti,
Pacific/Tarawa, Pacific/Tongatapu, Pacific/Wake, Pacific/Wallis

示例 #4 列出单个国家的标识符

<?php
$timezone_identifiers = DateTimeZone::listIdentifiers( DateTimeZone::PER_COUNTRY, "UA" );
foreach( $timezone_identifiers as $identifier ) {
    echo "$identifier\n";
}
?>

以上示例的输出类似于：

Europe/Kyiv
Europe/Simferopol
Europe/Uzhgorod
Europe/Zaporozhye

参见

timezone_abbreviations_list() - 别名 DateTimeZone::listAbbreviations

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User Contributed Notes 3 notes

down

kalle at example dot com ¶

8 years ago


Even though the manual currently says that the first parameter has to be "One of DateTimeZone class constants", you may actually combine these constants:

<?php
  $a = DateTimeZone::listIdentifiers(DateTimeZone::AFRICA); //gives africa time zones
  $b = DateTimeZone::listIdentifiers(DateTimeZone::AMERICA); //gives american time zones
  $c = DateTimeZone::listIdentifiers(DateTimeZone::AFRICA | DateTimeZone::AMERICA); //gives both african and american time zones
?>

Be sure to use |, not ||.

down

repohelga at example dot com ¶

4 years ago


Beware that the ISO 3166-1 country code passed to second parameter $country has to be in capital letters (eg. 'US', 'DE', ...).
Passing the country code in lower case like 'us' or 'de' will not return the failure-value false but just an empty array.

down

PHP Guru ¶

3 years ago


In tests that I have done, not all time zones are returned by this function. For example the following aliases Asia/Katmandu and Asia/Calcutta are not returned, but these time zones are supported in tests that I have done such as the following:

<?php
echo date_default_timezone_set('Asia/Calcutta');
?>

result:

Fri, 19 Jun 2020 03:26:52 +0530

UTC+05:30 is the correct time zone for Calcutta.

Asia/Katmandu and Asia/Calcutta are aliases for Asia/Kathmandu and Asia/Kolkata respectively (which can be found in the list)

Hopefully this helps some people because without these time zones appearing in the list one might not know that they are supported or even exist.

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