PHP timezone_identifiers_list() Function
The PHP timezone_identifiers_list() function returns a numerically indexed array containing all defined timezone identifiers. This function is an alias of DateTimeZone::listIdentifiers() method.
Syntax
//Object-oriented style public DateTimeZone::listIdentifiers(timezoneGroup, countryCode) //Procedural style timezone_identifiers_list(timezoneGroup, countryCode)
Parameters
timezoneGroup |
Optional. Specify one of the DateTimeZone class constants (or a combination). Default is DateTimeZone::ALL. |
countryCode |
Optional. Specify a two-letter ISO 3166-1 compatible country code. This option is only used when timezoneGroup is set to DateTimeZone::PER_COUNTRY. |
Return Value
Returns the array of timezone identifiers.
Example: using both styles
The example below shows the usage of timezone_identifiers_list() function.
<?php //getting the timezone identifiers using Object-oriented //style and displaying few identifiers $retval1 = DateTimeZone::listIdentifiers(); for ($i=0; $i < 10; $i++) { echo "$retval1[$i]\n"; } echo "-------------------\n"; //getting the timezone identifiers using Procedural //style and displaying few identifiers $retval2 = timezone_identifiers_list(); for ($i=100; $i < 110; $i++) { echo "$retval2[$i]\n"; } ?>
The output of the above code will be:
Africa/Abidjan Africa/Accra Africa/Addis_Ababa Africa/Algiers Africa/Asmara Africa/Bamako Africa/Bangui Africa/Banjul Africa/Bissau Africa/Blantyre ------------------- America/Eirunepe America/El_Salvador America/Fort_Nelson America/Fortaleza America/Glace_Bay America/Goose_Bay America/Grand_Turk America/Grenada America/Guadeloupe America/Guatemala
Example: using timezoneGroup and countryCode parameters
The timezoneGroup parameter can be specified as one of the DateTimeZone class constants and countryCode can be specified as two-letter ISO 3166-1 compatible country code. Consider the example below:
<?php //getting the timezone identifiers for Europe //timezoneGroup and displaying few identifiers $retval = timezone_identifiers_list(128); for ($i=0; $i < 10; $i++) { echo "$retval[$i]\n"; } echo "-------------------\n"; //getting the timezone identifiers for USA print_r(timezone_identifiers_list(4096, "US")); ?>
The output of the above code will be:
Europe/Amsterdam Europe/Andorra Europe/Astrakhan Europe/Athens Europe/Belgrade Europe/Berlin Europe/Bratislava Europe/Brussels Europe/Bucharest Europe/Budapest ------------------- Array ( [0] => America/Adak [1] => America/Anchorage [2] => America/Boise [3] => America/Chicago [4] => America/Denver [5] => America/Detroit [6] => America/Indiana/Indianapolis [7] => America/Indiana/Knox [8] => America/Indiana/Marengo [9] => America/Indiana/Petersburg [10] => America/Indiana/Tell_City [11] => America/Indiana/Vevay [12] => America/Indiana/Vincennes [13] => America/Indiana/Winamac [14] => America/Juneau [15] => America/Kentucky/Louisville [16] => America/Kentucky/Monticello [17] => America/Los_Angeles [18] => America/Menominee [19] => America/Metlakatla [20] => America/New_York [21] => America/Nome [22] => America/North_Dakota/Beulah [23] => America/North_Dakota/Center [24] => America/North_Dakota/New_Salem [25] => America/Phoenix [26] => America/Sitka [27] => America/Yakutat [28] => Pacific/Honolulu )
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