PHP 7.0.6 Released

    DateTimeZone::listIdentifiers

    timezone_identifiers_list

    (PHP 5 >= 5.2.0, PHP 7)

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

    Description

    Object oriented style

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

    Procedural style

    array timezone_identifiers_list ([ int $what = DateTimeZone::ALL [, string $country = NULL ]] )

    Parameters

    what

    One of DateTimeZone class constants.

    country

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

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

    Return Values

    Returns array on success or FALSE on failure.

    Changelog

    Version Description
    5.3.0 Added the optional what and country parameters.

    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

    User Contributed Notes

    kalle at example dot com
    2 months 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 ||.
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