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 ||.
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): arrayEstilo por procedimientos
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
whatestá establecido aDateTimeZone::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
add a note
User Contributed Notes 3 notes
kalle at example dot com ¶
8 years ago
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.
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.
