PHP根据访问用户IP判断所属区域信息

/**
 * 根据访问用户IP判断所属区域信息
 * 
 * @author flyer0126
 * @since  2012/07/09
 */

/**
 * 获取用户端ip
 * @return Ambigous <unknown, string>
 */
function getIP(){
  if (isset($_SERVER)) {
    if (isset($_SERVER[HTTP_X_FORWARDED_FOR])) {
      $realip = $_SERVER[HTTP_X_FORWARDED_FOR];
    } elseif (isset($_SERVER[HTTP_CLIENT_IP])) {
      $realip = $_SERVER[HTTP_CLIENT_IP];
    } else {
      $realip = $_SERVER[REMOTE_ADDR];
    }
  } else {
    if (getenv("HTTP_X_FORWARDED_FOR")) {
      $realip = getenv( "HTTP_X_FORWARDED_FOR");
    } elseif (getenv("HTTP_CLIENT_IP")) {
      $realip = getenv("HTTP_CLIENT_IP");
    } else {
      $realip = getenv("REMOTE_ADDR");
    }
  }
  return $realip;
}

$ip = getIP();

// 利用新浪接口根据ip查询所在区域信息
$res0 = file_get_contents("http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json&ip=$ip");
$res0 = json_decode($res0);
print_r($res0);

// 利用淘宝接口根据ip查询所在区域信息
$res1 = file_get_contents("http://ip.taobao.com/service/getIpInfo.php?ip=$ip");
$res1 = json_decode($res1);
print_r($res1);

 

 示例输出结果如下：

stdClass Object
(
    [ret] => 1
    [start] => XXX.XXX.XXX.XXX
    [end] => XXX.XXX.XXX.XXX
    [country] => 中国
    [province] => 北京
    [city] => 北京
    [district] => 
    [isp] => 电信
    [type] => 机房
    [desc] => 南三环洋桥电信机房
)
stdClass Object
(
    [code] => 0
    [data] => stdClass Object
        (
            [country] => 中国
            [country_id] => 86
            [area] => 华北
            [area_id] => 100000
            [region] => 北京市
            [region_id] => 110000
            [city] => 北京市
            [city_id] => 110000
            [county] => 
            [county_id] => -1
            [isp] => 电信
            [isp_id] => 100017
            [ip] => XXX.XXX.XXX.XXX
        )

)