DateTimeZone::getTransitions

timezone_transitions_get

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

DateTimeZone::getTransitions -- timezone_transitions_get — Returns all transitions for the timezone

Description

Object-oriented style

public DateTimeZone::getTransitions(int $timestampBegin = PHP_INT_MIN, int $timestampEnd = 2147483647): array|false

Procedural style

timezone_transitions_get(DateTimeZone $object, int $timestampBegin = PHP_INT_MIN, int $timestampEnd = 2147483647): array|false

Parameters

object

Procedural style only: A DateTimeZone object returned by timezone_open()

timestampBegin

Begin timestamp.

timestampEnd

End timestamp.

Return Values

Returns a numerically indexed array of transition arrays on success, or false on failure. DateTimeZone objects wrapping type 1 (UTC offsets) and type 2 (abbreviations) do not contain any transitions, and calling this method on them will return false.

If timestampBegin is given, the first entry in the returned array will contain a transition element at the time of timestampBegin.

Transition Array Structure
KeyTypeDescription
tsintUnix timestamp
timestringDateTimeInterface::ISO8601_EXPANDED (PHP 8.2 and later), or DateTimeInterface::ISO8601 (PHP 8.1 and lower) time string
offsetintOffset to UTC in seconds
isdstboolWhether daylight saving time is active
abbrstringTimezone abbreviation

Changelog

VersionDescription
8.1.0The default value of timestampEnd has been changed to 2147483647. Previously, it was PHP_INT_MAX.

Examples

Example #1 A timezone_transitions_get() example

<?php
$timezone = new DateTimeZone("Europe/London");
$transitions = $timezone->getTransitions();
print_r(array_slice($transitions, 0, 3));
?>

The above example will output something similar to:

Array
(
    [0] => Array
        (
            [ts] => -2147483648
            [time] => 1901-12-13T20:45:52+00:00
            [offset] => -75
            [isdst] =>
            [abbr] => LMT
        )

    [1] => Array
        (
            [ts] => 442304971
            [time] => 1847-12-01T00:01:15+00:00
            [offset] => 0
            [isdst] =>
            [abbr] => GMT
        )

    [2] => Array
        (
            [ts] => -1691964000
            [time] => 1916-05-21T02:00:00+00:00
            [offset] => 3600
            [isdst] => 1
            [abbr] => BST
        )

)

Example #2 A timezone_transitions_get() example with timestampBegin set

<?php
$timezone = new DateTimeZone("Europe/London");
$transitions = $timezone->getTransitions(time());
print_r(array_slice($transitions, 0, 3));
?>

The above example will output something similar to:

Array
(
    [0] => Array
        (
            [ts] => 1759058251
            [time] => 2025-09-28T11:17:31+00:00
            [offset] => 3600
            [isdst] => 1
            [abbr] => BST
        )

    [1] => Array
        (
            [ts] => 1761440400
            [time] => 2025-10-26T01:00:00+00:00
            [offset] => 0
            [isdst] => 
            [abbr] => GMT
        )

    [2] => Array
        (
            [ts] => 1774746000
            [time] => 2026-03-29T01:00:00+00:00
            [offset] => 3600
            [isdst] => 1
            [abbr] => BST
        )

)