首先访问http://whois.pconline.com.cn/ipJson.jsp?json=true，我们获取json为以下：

{"ip":"111.135.283.105","pro":"吉林省","proCode":"220000","city":"长春市","cityCode":"220100","region":"","regionCode":"0","addr":"吉林省长春市
铁通","regionNames":"","err":""}

file_get_contents获取参数，由于太平洋的页面是gbk的，所以utf-8要转化下。很简单，贴代码仅供参考：

<?php $ip =
@file_get_contents('http://whois.pconline.com.cn/ipJson.jsp?json=true');
$ip = iconv("GBK","UTF-8", $ip); $json = json_decode($ip,true); echo
$json['pro'].$json['city'];

php页面显示 吉林省长春市