Question

Is there an easy way to retrieve the locale from the timezone_identifier?

For example:

date_default_timezone_set('Europe/Berlin');

The Locale in that case should de_DE.

Answer 1

As deceze said there is no possiblity of this. But you can get location information from timezone. as php.net says

$tz = new DateTimeZone("Europe/Prague"); 
print_r($tz->getLocation());
print_r(timezone_location_get($tz));

will output

Array
(
 [country_code] => CZ
 [latitude] => 50.08333
 [longitude] => 14.43333
 [comments] => 
)
Array
(
 [country_code] => CZ
 [latitude] => 50.08333
 [longitude] => 14.43333
 [comments] => 
)