PHP Anti-Theft chain code example, PHP anti-theft Instance _php tutorial

PHP Anti-Theft chain code example, PHP anti-theft instance

Anti-theft chain is a very common web programming technique at present. This article shows an example of how to implement the PHP anti-theft chain. Share it for everyone's reference. Here's how:

The main function code is as follows:

<?php/* How to use: Save the above code as dao4.php, such as Test Validatecode.rar at the site http://www. Xxxx.com, use the following code to indicate the download connection. File name? site=1&file= files such as the following url:http://www. Xxxx.cn/dao4.php?site=1&file=validatecode.rar */$ADMIN [Defaulturl] = "http://www. Xxxx.com/404.htm "; Hotlinking returns the address $okaysites = Array (  "http://www. xxxx.com/",  " http://XXXX.com "); Whitelist $admin[url_1] = "http://www. Xxxx.com/download/"; Download location 1$admin[url_2] = ""; Download location 2, and so on $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]");}? >

I hope this article will help you learn PHP programming.

PHP set code for anti-theft chain

Instead of using PHP to consume more resources, it is recommended to start with the server and change the Apache configuration
The following is the PHP implementation of the code, Xxx.mp3 is the actual address of your music file, when the external spread only the PHP address, MP3 address is not public
if (Strpos ($_server[' http_referer '), ' qq.com ')!== FALSE) {
Header (' http/1.1 404 Not Found ');
Exit
}
ReadFile (' Xxx.mp3 ');
?>

PHP set code for anti-theft chain

Can be implemented you can search the web of PHP binary output image of the method because the image output to go through PHP, so you can use PHP to first judge

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