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php图片文件,下载文件,防盗链设置方法

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Release: 2016-05-25 16:41:16
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在php中最简单的防盗链办法就是利用php的$_SERVER[\'HTTP_REFERER\']函数来操作了,但是此方法不可靠了,我们最终还是需要使用apache,iis来进行操作的,下面我分享介绍了,有需要的朋友可参考.

php防盗链,代码如下:

<?php 
session_start(); 
session_register(‘check’); 
$_SESSION[‘check’]=true; 
?>
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检查session变数,判断是否造访首页,并且检查他的来源网页参考(HTTP_REFERER)是否来自本地网站的网页,方法如代码如下:

<?php 
session_start(); 
$refs = parse_url($_SERVER[&#39;HTTP_REFERER&#39;]); //分解参考网页资讯 
//检查首页session及来源主机是否相同,phprm.com
if(!($_SESSION[&#39;check&#39;]) || $refs[&#39;host&#39;] != $_SERVER[&#39;HTTP_HOST&#39;]) 
exit; 
?>
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注意:这个只能简单的防盗链了,如果稍懂一点的就可以破解了.利用服务器来设置php防盗连.

apache防盗链,修改httpd.conf,代码如下:

SetEnvIfNoCase Referer "^" local_ref=1  
<FilesMatch ".(gif|jpg)">  
Order Allow,Deny  
Allow from env=local_ref  
</FilesMatch>
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如果希望显示一张“禁止盗链”的图片,我们可以用mod_rewrite 来实现,首先在安装 apache 时要加上 --enable-rewrite 参数加载 mod_rewrite 模组,假设“禁止盗链”的图片为abc.gif,我们在 httpd.conf 中可以这样配置,代码如下:

RewriteEngine on  
RewriteCond %{HTTP_REFERER} !^$  
RewriteCond %{HTTP_REFERER} !^http://(www.)?www.phprm.com /.*$ [NC]  
RewriteRule .(gif|jpg)$ abc.gif [R,L] 
DocumentRoot "/usr/local/apache/htdocs"  
#设置存放站点html文件的目录。 
<Directory />  
Options FollowSymLinks  
AllowOverride None  
</Directory>
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iis防盗链:执行文件选择 c:RewriteRewrite.dll 即可以了,httpd.ini是配置文件.

图片防盗链代码如下:

[ISAPI_Rewrite]  
# 3600 = 1 hour  
CacheClockRate 3600  
RepeatLimit 32  
# Protect httpd.ini and httpd.parse.errors files  
# from accessing through HTTP  
RewriteCond Host: (.+)  
RewriteCond Referer: (?!http://1.*).*  
RewriteRule .*.(?:gif|jpg|png|bmp) /force.gif [I,O]
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