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DateTimeZone::listIdentifiers

timezone_identifiers_list

(PHP 5 >= 5.2.0, PHP 7)

DateTimeZone::listIdentifiers -- timezone_identifiers_listすべてのタイムゾーン識別子を含む配列を返す

説明

オブジェクト指向型

public static DateTimeZone::listIdentifiers ([ int $timezoneGroup = DateTimeZone::ALL [, string $countryCode = NULL ]] ) : array|false

手続き型

timezone_identifiers_list ([ int $timezoneGroup = DateTimeZone::ALL [, string $countryCode = NULL ]] ) : array|false

パラメータ

timezoneGroup

DateTimeZone のクラス定数のいずれか (または定数の組み合わせ)。

countryCode

2 文字の ISO 3166-1 互換の国コード。

注意: このオプションを使用するのは、timezoneGroupDateTimeZone::PER_COUNTRY を設定した場合のみです。

返り値

成功した場合に配列、失敗した場合に FALSE を返します。

例1 timezone_identifiers_list() の例

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

上の例の出力は、 たとえば以下のようになります。

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

参考

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User Contributed Notes 3 notes

up
21
kalle at example dot com
4 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 ||.
up
1
repohelga at example dot com
1 year 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.
up
-1
PHP Guru
5 months 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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