I am using timezone to get exact time of a user according to his timezone. I have a drop down list to select timezone for users and showing their current time as they selected their timezone. The code i am using is:
$timezone = 'America/New_York';
date_default_timezone_set($timezone);
echo date('H:i:s A');
It is working fine. I want to get locale of that user using timezone in the same way I am getting current time for that timezone.
How can I achieve the current locale using timezone? Does PHP have any kind of solution to get current locale using timezone?
Locale and time zone are orthogonal. You cannot determine one from the other.
America/New_York means that the user's local time is aligned to New York City, which happens to be called "Eastern Time" in the United States, which is 5 hours behind UTC during standard time and 4 hours behind UTC when daylight saving time is in effect.
en-US (or en_US) means that the user speaks English, with cultural dialects (word choice, numbers, dates, etc.) of the United States. For example, en-US uses MM/DD/YYYY date format, and en-GB uses DD/MM/YYYY date format, but we both call our first month "January", while es-MX calls their first month "enero".
I could very well be an English speaking American visiting Japan, thus my time zone would be Asia/Tokyo even though my local would still be en-US.
Aside: A hyphen (-) is the correct character to split language and country codes in a locale identifier. Though some implementations have substituted an underscore (_), this is not correct by the IETF language tag specification.