今天在给客户修改主题时候有一项功能，需要显示用户所在国家、省份以及城市，通过新浪的IP查询工具接口利用json可以快速实现

第一步：在function里面丢进下面的代码：

PHP">function liuronghuan_getip(){
 if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"),"unknown")) {
   $ip = getenv("HTTP_CLIENT_IP");
  } else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"),"unknown")) {
   $ip = getenv("HTTP_X_FORWARDED_FOR");
  } else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"),"unknown")) {
   $ip = getenv("REMOTE_ADDR");
  } else  if (isset ($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'],"unknown")) {
   $ip = $_SERVER['REMOTE_ADDR'];
  } else {
   $ip = "unknown";
  }
 return $ip;
}
function liuronghuan_getLocation($ip=''){

empty($ip) && $ip = liuronghuan_getip();

if($ip=="127.0.0.1") return "本机地址";

$api = "http://int.dpool.sina.com.cn/iplookup/iplookup.PHP?format=json&ip=$ip";

$json = @file_get_contents($api);//调用新浪IP地址库

$arr = json_decode($json,true);//解析json

$country = $arr['country']; //取得国家

$province = $arr['province'];//获取省份

$city = $arr['city']; //取得城市

if((string)$country == "中国"){

if((string)($province) != (string)$city){

$_location = $province.$city;

}else{

$_location = $country.$city;

}

}else{

$_location = $country;

}

return $_location;

}

第二步：在需要显示访客地址的地方写入下面的代码：

PHP">欢迎您，来自的朋友！