PHP: Get Timezone & Time Difference from Latitude & Longitude using Google Maps Time Zone API

This article shows how you can get TimeZone name and id in PHP from latitude and longitude value by using Google Maps Time Zone API.

Note that: You need to put your API Key in the maps api url like this:
https://maps.googleapis.com/maps/api/timezone/json?location=$latitude,$longitude&timestamp=$time&key=xxxxxxxxxxxxxxxxxxxxx

You can get the API key from here: Get API Key

Here is the source code:

$latitude = 27.7172453;
$longitude = 85.3239605;
$time = time();
$url = "https://maps.googleapis.com/maps/api/timezone/json?location=$latitude,$longitude&timestamp=$time&key=YOUR-API-KEY";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$responseJson = curl_exec($ch);
curl_close($ch);

$response = json_decode($responseJson);
//var_dump($response);
echo $response->timeZoneId;

Get time from timezone in PHP

$timezone = $response->timeZoneId; // TIMEZONE VALUE YOU GET FROM THE RESPONSE OF MAPS API
$date = new DateTime("now", new DateTimeZone($timezone));
echo $date->format('Y-m-d H:i:s');

Get time difference between the timezone time and GMT time

$timezone = $response->timeZoneId; // TIMEZONE VALUE YOU GET FROM THE RESPONSE OF MAPS API
$date = new DateTime("now", new DateTimeZone($timezone));
$date_1 = $date->format('Y-m-d H:i:s'); // DATE TIME OF THE FETCHED TIMEZONE
$date_2 = gmdate('Y-m-d H:i:s'); // DATE TIME OF GMT
$datetime1 = date_create($date_1);
$datetime2 = date_create($date_2);
$interval = date_diff($datetime1, $datetime2);
echo $interval->format('%h %i'); // TIME DIFFERENCE IN HOURS & SECONDS

Another way to get time difference between two timezones

$origin_tz = $response->timeZoneId; // TIMEZONE VALUE YOU GET FROM THE RESPONSE OF MAPS API
$remote_tz = 'UTC'; // UTC TIMEZONE
$origin_dtz = new DateTimeZone($origin_tz);
$remote_dtz = new DateTimeZone($remote_tz);
$origin_dt = new DateTime("now", $origin_dtz);
$remote_dt = new DateTime("now", $remote_dtz);
$offset = $origin_dtz->getOffset($origin_dt) - $remote_dtz->getOffset($remote_dt); // TIME DIFFERENCE IN SECONDS
echo $offset/ (60*60); // TIME DIFFERENCE IN HOURS

Hope this helps. Thanks.