有道搜索和IP138的IP的API接口(PHP应用)

代码如下：

<?php 
$myip = $_SERVER["REMOTE_ADDR"]; 
//ip138 http://wap.ip138.com/ip.asp?ip=www.myolnet.com 
//youdao http://www.youdao.com/smartresult-xml/search.s?type=ip&q=ip 
$ipinfo=fcontents("http://www.youdao.com/smartresult-xml/search.s?type=ip&q=".$myip);//此代码为有道ip库 
if(strpos($ipinfo,'北京') > 0) { 
header('HTTP/1.1 301 Moved Permanently'); 
header("Location: //www.jb51.net"); 
} 
?>