DateTimeZone::listIdentifiers

timezone_identifiers_list

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

DateTimeZone::listIdentifiers -- timezone_identifiers_list — Returns a numerically indexed array containing all defined timezone identifiers

Description

Object-oriented style

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

Procedural style

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

Parameters

timezoneGroup

One of the DateTimeZone class constants (or a combination).

countryCode

A two-letter ISO 3166-1 compatible country code.

Note: This option is only used when timezoneGroup is set to DateTimeZone::PER_COUNTRY.

Return Values

Returns the array of timezone identifiers.

Changelog

Version Description
8.0.0 Prior to this version, false was returned on failure.
7.1.0 countryCode is nullable now.

Examples

Example #1 A timezone_identifiers_list() example

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

The above example will output something similar to:

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

See Also