DateTimeZone::listIdentifiers

timezone_identifiers_list

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

DateTimeZone::listIdentifiers -- timezone_identifiers_list — Devuelve un array indexado numéricamente que contiene todos los identificadores de zonas horarias definidos

Descripción

Estilo orientado a objetos

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

Estilo por procedimientos

timezone_identifiers_list(int $what = DateTimeZone::ALL, string $country = null): array

Parámetros

what: Una de las constantes de la clase DateTimeZone.
country: Un código de país de dos letras compatible con ISO 3166-1.

Nota: Esta opción sólo se usa cuando el parámetro what está establecido a DateTimeZone::PER_COUNTRY.

Valores devueltos

Devuelve una matriz si se tuvo éxito o false en caso de error.

Historial de cambios

Versión	Descripción
5.3.0	Añadidos los parámteros opcionales `what` y `country`.

Ejemplos

Ejemplo #1 Un ejemplo de timezone_identifiers_list()

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

El resultado del ejemplo sería algo similar a:

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

Ver también

timezone_abbreviations_list() - Alias de DateTimeZone::listAbbreviations

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User Contributed Notes 3 notes

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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 ¶

5 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 ¶

4 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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