How to get Time Zone through IP Address in PHP [duplicate]

Answer 1

There's no absolutely certain way to get the client's timezone, but if you have the client submit the date and time from their machine, you can compute it based on what the time it is relative to GMT. So, if it's 7:00pm on their machine and it's 12:00am GMT, then you can determine they are -5 from GMT or (EST/DST)

Answer 2

If what you need to know is the timezone of users browsing your webpage, then you can use some service like IP2LOCATION to guess the timezone. Keep in mind though, as altCognito said, this is not a 100% accurate way of telling client's timezone. There are some accuracy problems with this approach.

Answer 3

If you're running it on the local machine, you can check the configured timezone.
http://www.php.net/manual/en/function.date-default-timezone-get.php

There are a lot better and more reliable methods then trying to guess timezone using GeoIP. If you're feeling lucky, try: http://www.php.net/manual/en/book.geoip.php

$region = geoip_region_by_name('www.example.com');
$tz = geoip_time_zone_by_country_and_region($region['country_code'],
                                            $region['region']);