geoplugin.php

<?php
$client  = @$_SERVER['HTTP_CLIENT_IP'];
$forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
$remote  = @$_SERVER['REMOTE_ADDR'];
$region  = array('country'=>'', 'city'=>'');
if(filter_var($client, FILTER_VALIDATE_IP)) $ip = $client;
elseif(filter_var($forward, FILTER_VALIDATE_IP)) $ip = $forward;
else $ip = $remote;
$ip_data = @json_decode(file_get_contents("http://www.geoplugin.net/json.gp?ip=".$ip));    
if($ip_data && $ip_data->geoplugin_countryName != null)
{
  $region = $ip_data->geoplugin_regionName;
}
// echo $region;
?>
<script>
  jQuery(function(){
    jQuery('input.field-region').val(<?= json_encode($region) ?>);
  });
</script>