PHP: Get the timezone from where the application was accessed - php

Question

Laravel 7.x
I need to access the timezone from where the application was accessed. I am only getting UTC in return from echo date_default_timezone_get();.
But I need to get something like Asia/Kolkata in return. For the access logs.

Answer 1

As said in the comments, you can only make a guess, but not have 100% sure.
I made some modifications to Chandra Nakka's function.
It will validate the guess with the timezone_identifiers_list() function, if it's not a valid timezone, the default will be returned.
function set_timezone_by_client_location($ip = NULL, $deep_detect = TRUE) {
$output = NULL;
if (filter_var($ip, FILTER_VALIDATE_IP) === FALSE) {
$ip = $_SERVER["REMOTE_ADDR"];
if ($deep_detect) {
if (filter_var(#$_SERVER['HTTP_X_FORWARDED_FOR'], FILTER_VALIDATE_IP))
$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
if (filter_var(#$_SERVER['HTTP_CLIENT_IP'], FILTER_VALIDATE_IP))
$ip = $_SERVER['HTTP_CLIENT_IP'];
}
}
$continents = array(
"AF" => "Africa",
"AN" => "Antarctica",
"AS" => "Asia",
"EU" => "Europe",
"OC" => "Australia",
"NA" => "America",
"SA" => "America"
);
$timezone = null;
if (filter_var($ip, FILTER_VALIDATE_IP)) {
$ipdat = #json_decode(file_get_contents("http://www.geoplugin.net/json.gp?ip=" . $ip));
if (#strlen(trim($ipdat->geoplugin_countryCode)) == 2) {
$timezone = #$continents[strtoupper($ipdat->geoplugin_continentCode)] . '/' . #$ipdat->geoplugin_regionName;
$timezone = str_replace(' ', '_', $timezone);
}
}
if(!in_array($timezone, timezone_identifiers_list())){
$timezone = date_default_timezone_get();
}
return $timezone;
}
$timezone = set_timezone_by_client_location();
echo $timezone;

Answer 2

Framework: Laravel 7.x
namespace App\Services;
class TimeZoneService
{
/**
* Protected Variables
*/
protected $host = null;
protected $filter = null;
protected $ip = null;
protected $json = null;
public function __construct($ip, $filter = false)
{
$this->ip = $ip;
$this->filter = $filter;
$this->host = "http://www.geoplugin.net/json.gp?ip={$ip}";
}
/**
* fetch the location data via given IP address
*
* #return array
*/
public function getData()
{
if(function_exists('curl_init'))
{
# use cURL to fetch data
$request = curl_init();
# setting options
curl_setopt($request, CURLOPT_URL, $this->host);
curl_setopt($request, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($request, CURLOPT_USERAGENT, 'geoPlugin PHP Class v1.1');
# response
$this->json = curl_exec($request);
# closing cURL
curl_close($request);
}
else if (ini_get('allow_url_fopen'))
{
# fall back to fopen()
$this->json = file_get_contents($this->host, 'r');
}
else
{
trigger_error('geoPlugin Error: Cannot retrieve data.', E_USER_ERROR);
return;
}
# returning
return $this;
}
/**
* convert the json string to php array
* based on the filter property
*
* #return array
*/
public function toArray()
{
# condition(s)
if($this->filter != true)
{
return json_decode($this->json, true);
}
# filtering & returning
return $this->__filter();
}
/**
* convert the json string to php object
* based on the filter property
*
* #return object
*/
public function toObject()
{
# condition(s)
if($this->filter != true)
{
return json_decode($this->json);
}
# filtering & returning
return (object)$this->__filter();
}
/**
* return collected location data in the form of json
* based on the filter property
*
* #return string
*/
public function toJson()
{
# condition(s)
if($this->filter != true)
{
return $this->json;
}
# filtering & returning
return json_encode($this->__filter());
}
/**
* filter the object keys
*
* #return array
*/
private function __filter()
{
# applying filter
foreach(json_decode($this->json, true) as $key => $item)
{
$return[str_replace('geoplugin_', '', $key)] = $item;
}
# returning
return $return;
}
}
SomeController.php
/**
* Services
*/
use App\Services\TimeZoneService;
class SomeController extends Controller
{
public function someMethod()
{
# services
$TimeZone = new TimeZoneService(<string IP_ADDRESS>, <boolean FILTER>);
$locationData = $TimeZone->getData()->toJson();
# OR
$locationData = $TimeZone->getData()->toArray();
# OR
$locationData = $TimeZone->getData()->toObject();
...
}
}
This code is working fine for me. However, If you see any room for improvement then please feel free to update the code to help others.
Thank you.