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IntlTimeZone::getGMT	IntlTimeZone::getID

IntlTimeZone	Last updated: Mon, 26 Oct 2026

IntlTimeZone::getIanaID

intltz_get_iana_id

(PHP 8 >= 8.4.0)

IntlTimeZone::getIanaID -- intltz_get_iana_id — Translate a timezone identifier to its IANA equivalent

Description

Object-oriented style (method):

public static function IntlTimeZone::getIanaID(string $timezoneId): string|false

Procedural style:

function intltz_get_iana_id(string $timezoneId): string|false

Translates a timezone identifier to its IANA equivalent. For example, "GMT" returns "Etc/GMT", and "US/Eastern" returns "America/New_York".

Note:
This function requires ICU version >= 74.

Parameters

timezoneId: The timezone identifier to translate.

Return Values

Returns the IANA timezone identifier as a string, or false on failure.

See Also

intltz_get_id_for_windows_id() - Translate a Windows timezone into a system timezone
intltz_get_windows_id() - Translate a system timezone into a Windows timezone
intltz_create_time_zone() - Create a timezone object for the given ID

IntlTimeZone::getGMT	IntlTimeZone::getID

IntlTimeZone	Last updated: Mon, 26 Oct 2026