通过GeoIP获取ip所属地 (国家，城市，时区，邮编，经纬度等)

或者 使用某网站的API

API 1.

1. 返回文字

Html代码

http://api.hostip.info/get_html.php?ip=12.215.42.19&position=true
2. 返回图片

Html代码


<IMG SRC="http://api.hostip.info/flag.php?ip=12.215.42.19" ALT="IP Address Lookup">

API 2. （需要申请api key ，免费的，类似google）



城市：

Html代码

http://api.ipinfodb.com/v3/ip-city/?key=<your_api_key>&ip=74.125.45.100
国家（更快） ：

Html代码

http://api.ipinfodb.com/v3/ip-country/?key=<your_api_key>&ip=74.125.45.100
Parameter Required Default Value

key	Yes	<empty>	API key provided with your free account.
ip	No	Client IP	IP address
format	No	raw	raw, xml, json
callback	No	<empty>	Required when using json callback.

Please use the appropriate API for your needs. You can help us keep the load low on our servers by making sure that :

If you only need the country name, avoid using the city precision API.
If you track your visitors, avoid querying our API for all your page views (you can store the geolocation in a cookie, see below for an example)

API Precision Timezone Domains lookups

ip-city	City	Yes	Yes
ip-country	Country	No	Yes

Please use the appropriate API for your needs. You can help us keep the load low on our servers by making sure that :

If you only need the country name, avoid using the city precision API.
If you track your visitors, avoid querying our API for all your page views (you can store the geolocation in a cookie, see below for an example)

key: c9dcc88453e33a9e63ebad8d65f91583e87abd8185dd95f09fbeef6c62264f7d

其他参考
http://pecl.php.net/package/geoip http://www.geoiptool.com/ http://www.hostip.info/use.html http://phpweby.com/software/ip2country http://www.ipinfodb.com/index.php