Its an alias of DateTimeZone::listAbbreviations()and returns associative array containing dst, offset and the timezone name
Example
<?php
echo “<pre>”;
$timezone = timezone_abbreviations_list();
print_r($timezone[‘admt’]);
?>
Output
Array
(
[0] => Array
(
[dst] =>
[offset] => 9320
[timezone_id] => Africa/Addis_Ababa
)
[1] => Array
(
[dst] =>
[offset] => 9320
[timezone_id] => Africa/Asmara
)
[2] => Array
(
[dst] =>
[offset] => 9320
[timezone_id] => Africa/Asmera
)
)