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

    publicstaticDateTimeZone::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 (uppercase) 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. Only non-outdated items are returned. To get all, including outdated timezone identifiers, use the DateTimeZone::ALL_WITH_BC as value for timezoneGroup.

    Changelog

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

    Examples

    Example #1 A DateTimeZone::listIdentifiers() 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

    Example #2 Listing identifiers for a specific region

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

    The above example will output something similar to:

    Asia/Aden Asia/Almaty Asia/Amman Asia/Anadyr Asia/Aqtau

    Example #3 Listing identifiers for multiple regions

    <?php
    $timezone_identifiers     = DateTimeZone::listIdentifiers( DateTimeZone::ASIA | DateTimeZone::PACIFIC );
    echo     join( ', ', $timezone_identifiers );
    ?>

    The above example will output something similar to:

    Asia/Aden, Asia/Almaty, Asia/Amman, Asia/Anadyr, Asia/Aqtau, Asia/Aqtobe, Asia/Ashgabat, Asia/Atyrau, Asia/Baghdad, Asia/Bahrain, Asia/Baku, Asia/Bangkok, Asia/Barnaul, Asia/Beirut, Asia/Bishkek, Asia/Brunei, Asia/Chita, Asia/Choibalsan, Asia/Colombo, Asia/Damascus, Asia/Dhaka, Asia/Dili, Asia/Dubai, Asia/Dushanbe, Asia/Famagusta, Asia/Gaza, Asia/Hebron, Asia/Ho_Chi_Minh, Asia/Hong_Kong, Asia/Hovd, Asia/Irkutsk, Asia/Jakarta, Asia/Jayapura, Asia/Jerusalem, Asia/Kabul, Asia/Kamchatka, Asia/Karachi, Asia/Kathmandu, Asia/Khandyga, Asia/Kolkata, Asia/Krasnoyarsk, Asia/Kuala_Lumpur, Asia/Kuching, Asia/Kuwait, Asia/Macau, Asia/Magadan, Asia/Makassar, Asia/Manila, Asia/Muscat, Asia/Nicosia, Asia/Novokuznetsk, Asia/Novosibirsk, Asia/Omsk, Asia/Oral, Asia/Phnom_Penh, Asia/Pontianak, Asia/Pyongyang, Asia/Qatar, Asia/Qostanay, Asia/Qyzylorda, Asia/Riyadh, Asia/Sakhalin, Asia/Samarkand, Asia/Seoul, Asia/Shanghai, Asia/Singapore, Asia/Srednekolymsk, Asia/Taipei, Asia/Tashkent, Asia/Tbilisi, Asia/Tehran, Asia/Thimphu, Asia/Tokyo, Asia/Tomsk, Asia/Ulaanbaatar, Asia/Urumqi, Asia/Ust-Nera, Asia/Vientiane, Asia/Vladivostok, Asia/Yakutsk, Asia/Yangon, Asia/Yekaterinburg, Asia/Yerevan, Pacific/Apia, Pacific/Auckland, Pacific/Bougainville, Pacific/Chatham, Pacific/Chuuk, Pacific/Easter, Pacific/Efate, Pacific/Fakaofo, Pacific/Fiji, Pacific/Funafuti, Pacific/Galapagos, Pacific/Gambier, Pacific/Guadalcanal, Pacific/Guam, Pacific/Honolulu, Pacific/Kanton, Pacific/Kiritimati, Pacific/Kosrae, Pacific/Kwajalein, Pacific/Majuro, Pacific/Marquesas, Pacific/Midway, Pacific/Nauru, Pacific/Niue, Pacific/Norfolk, Pacific/Noumea, Pacific/Pago_Pago, Pacific/Palau, Pacific/Pitcairn, Pacific/Pohnpei, Pacific/Port_Moresby, Pacific/Rarotonga, Pacific/Saipan, Pacific/Tahiti, Pacific/Tarawa, Pacific/Tongatapu, Pacific/Wake, Pacific/Wallis

    Example #4 Listing identifiers for a single country

    <?php
    $timezone_identifiers     = DateTimeZone::listIdentifiers( DateTimeZone::PER_COUNTRY, "UA" );
    foreach(     $timezone_identifiers as $identifier ) {
    echo     "$identifier\n";
    }
    ?>

    The above example will output something similar to:

    Europe/Kyiv Europe/Simferopol Europe/Uzhgorod Europe/Zaporozhye

    See Also

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