PHP prohibits picture hotlinking

Source: Internet
Author: User
1, assume the host domain name of the link picture: www.test.com
2. Modify Httpd.conf
Setenvifnocase Referer "^http://www.test.com/" local_ref=1
<filesmatch ". (gif|jpg) ">
Order Allow,deny
Allow from Env=local_ref
</FilesMatch>

This simple application can not only solve the problem of picture hotlinking, a little modification can also prevent any file hotlinking download problems.
 
Using the above method when you connect a picture from a host that is not specified, the picture will not display, and if you want to display a "no hotlinking" picture, we can use the mod_rewrite to achieve it.
 
First, add the--enable-rewrite parameter to load the Mod_rewrite module when you install Apache.
 
Suppose the "Prohibit hotlinking" picture is abc.gif and we can configure this in httpd.conf:
Rewriteengine on
Rewritecond%{http_referer}!^$
Rewritecond%{http_referer}!^http://(www.)? test.com/.*$ [NC]
Rewriterule. (gif|jpg) $ yun_qi_img/abc.gif [r,l]

When the host's picture is hotlinking, will only see abc.gif this "forbids hotlinking" the picture!


Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.