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PHP防盗链代码实例_php技巧

May 16, 2016 pm 08:37 PM
php Anti-hotlinking

防盗链是目前非常常见的web程序设计技巧。本文就以一个实例展示了PHP防盗链的实现方法。分享给大家供大家参考之用。具体方法如下:

主要功能代码如下:

<&#63;php
/*
使用方法:将上述代码保存为dao4.php,
比如测试用的validatecode.rar在站点http://www.XXXX.com里面,
则用以下代码表示下载连接.
文件名&#63;site=1&file=文件 
例如以下URL:
http://www.XXXX.cn/dao4.php&#63;site=1&file=validatecode.rar 
*/
$ADMIN[defaulturl] = "http://www.XXXX.com/404.htm"; //盗链返回的地址
$okaysites = array(
  "http://www.XXXX.com/",
  "http://XXXX.com"
); //白名单
$ADMIN[url_1] = "http://www.XXXX.com/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]");
}
&#63;>

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希望本文所述对大家学习PHP程序设计有所帮助。

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