比如,我有一个开发一个黄页源码上转到了脚本之家。之前定了一个演示程序地址: http://www.jb51.net 而现在这个域名需要用来作其它的站,又不杀望原来的演示地址失效怎么办呢。那我就可以利用PHP REFERER来判断来源如果它是自至站长下载站的地址 我就把它己转移站点域名上。
我就是在http://www.jb51.net这个站点上的index.php里放置了如下的代码让其来源于 files.jb51.net 的访问定位到我的服务器常用软件下载 http://s.jb51.net
大家可以到这个页面里的 演示地址
$referHost = parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST);
$validDomain = 'files.jb51.net';
$valid = strstr($referHost, $validDomain) == $validDomain;
if(!empty($valid)){
echo '<script>location.href="http://s.jb51.net";</script>';
exit;
}

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