Two PHP anti-hotlinking methods

1. Simple hotlink prevention

The code is as follows:

$ADMIN[defaulturl] = "http://jb51.net/404.htm";//盗链返回的地址 
$okaysites = array("http://jb51.net/","http://www.jb51.net"); //白名单 
$ADMIN[url_1] = "http://jb51.net/temp/download/";//下载地点1 
$ADMIN[url_2] = "";//下载地点2，以此类推 
$reffer = $HTTP_REFERER; 
if($reffer) { 
$yes = 0; 
while(list($domain, $subarray) = each($okaysites)) { 
if (ereg($subarray,"$reffer")) { 
$yes = 1; 
} 
} 
$theu = "url"."_"."$site"; 
if ($ADMIN[$theu] AND $yes == 1) { 
header("Location: $ADMIN[$theu]/$file"); 
} else { 
header("Location: $ADMIN[defaulturl]"); 
} 
} else { 
header("Location: $ADMIN[defaulturl]"); 
} 
?>

How to use: Save the above code as dao4.php,
For example, I used it for testing validatecode.rar is in my site http://jb51.net/temp/download,
uses the following code to represent the download connection.
CODE: [Copy to clipboard]
File name?site=1&file =File

2. Anti-hotlinking method for software downloads

The code is as follows:

//放置下载软件的根目录相对于当前脚本目录的相对目录 
$fileRelPath = "../../software"; 
//例外允许连接的网址，注意:自身域名不需要填入,设定为肯定可以下载, 
// 空字符串("")表示直接输入网址下载的情况
 $excludeReferArr = array("www.wjb51.net", "wjb51.net"); chdir($fileRelPath); $fileRootPath = getcwd() ."/"; 
 $filePath=$HTTP_GET_VARS["file"]; $url=parse_url($_SERVER["HTTP_REFERER"]); 
 if($url[host]!=$_SERVER["HTTP_HOST"]&& !in_array($referHost, $excludeReferArr))
   ?>

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