$dtz = new DateTimeZone("Europe/London");
echo "<pre>";
print_r($dtz->getLocation());
print_r(timezone_location_get($dtz));
echo "</pre>";
/*
run:
Array
(
[country_code] => GB
[latitude] => 51.50833
[longitude] => -0.12528
[comments] =>
)
Array
(
[country_code] => GB
[latitude] => 51.50833
[longitude] => -0.12528
[comments] =>
)
*/