(PHP 5 >= 5.2.0)
timezone_transitions_get — Returns all transitions for the timezone
DateTimeZone object.
Returns numerically indexed array containing associative array with all transitions on success or FALSE on failure.
Example#1 A timezone_transitions_get() example
<?php
$timezone = new DateTimeZone("CET");
print_r(reset($timezone->getTransitions()));
?>
The above example will output something similar to:
Array
(
[ts] => -1693706400
[time] => 1916-04-30T22:00:00+0000
[offset] => 7200
[isdst] => 1
[abbr] => CEST
)