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Clients IP Address Location

$_SERVER['REMOTE_ADDR'] may not contain the real client’s IP address. It will give you a proxy address for a client connected through a proxy, for example.

With the client’s IP address, you can determine its location using a service by http://ipinfo.io. 

<!DOCTYPE html>
<html><body>
<pre>
<?php
$ip = getenv('HTTP_CLIENT_IP')?:
         getenv('HTTP_X_FORWARDED_FOR')?:
         getenv('HTTP_X_FORWARDED')?:
         getenv('HTTP_FORWARDED_FOR')?:
         getenv('HTTP_FORWARDED')?:
         getenv('REMOTE_ADDR');
$details = json_decode(file_get_contents("http://ipinfo.io/{$ip}/json"));
print_r($details); 
?>
</pre>
</body></html>

stdClass Object
(
    [ip] => 115.133.78.155
    [hostname] => No Hostname
    [city] => Kota Kinabalu
    [region] => Sabah
    [country] => MY
    [loc] => 5.8626,115.9946
    [org] => AS4788 TM Net, Internet Service Provider
    [postal] => 88000
)
(Function Parameters Legend)
To save space, the following sections abbreviate function prototypes by using a short form for the parameters. Some of the data types are listed below:
$b : boolean  
$i : integer
$f : float
$s : string
$e : exception
$m : mixed
$r : $resource
$arr : array
$f() : function
$cf() : comparison function
$ts : timestamp in integer