如何在PHP中使用IP地址获取国家和城市

I am trying  to get country and city using ip address in php.My code is given below.

我得到了输出。任何机构都为这些问题提供任何解决方案？我像这样放了IP地址：- 127.0.0.1 城市：- 未定义 国家：- 未定义

 <?php
 /*Get user ip address*/
 $ip_address=$_SERVER['REMOTE_ADDR'];
/*Get user ip address details with geoplugin.net*/
$geopluginURL='http://www.geoplugin.net/php.gp?ip='.$ip_address;
$addrDetailsArr = unserialize(file_get_contents($geopluginURL)); 
/*Get City name by return array*/
$city = $addrDetailsArr['geoplugin_city']; 
/*Get Country name by return array*/
$country = $addrDetailsArr['geoplugin_countryName'];
/*Comment out these line to see all the posible details*/
/*echo '<pre>';
print_r($addrDetailsArr);
die();*/
if(!$city){
$city='Not Define';
}if(!$country){
$country='Not Define';
 }
echo '<strong>IP Address</strong>:- '.$ip_address.'<br/>';
echo '<strong>City</strong>:- '.$city.'<br/>';
echo '<strong>Country</strong>:- '.$country.'<br/>';
?>