php image protection

Posted on 2010-09-06
Medium Priority
Last Modified: 2013-12-13
i have asked this question before on experts exchange but didn't get right answer.

here is the problem.

i am showing an image on page but i don't want people to download it. what i have done right now is disabled right click so that naive users cannot download directly, but i know disabling right click is like no protection at all. so i want a system where images are produced by php file like say i call

<a href="imahe.php?src=image.jpg">thumbnail</a>

and image is produced but if some one accesses the script directly then he should get blank screen. previously i used sessions. when file was being accessed from my gallery page session['show'] is set to1 but when it is accessed directly session['show] is set to 0 and it was working well for me. but i found this plugin for firefox .. coolpreviews which gave user ablity to show download image no matter what.

don't know if i am being very clear here or not. but i would like if some one could help me with it.
thanks in advance
Question by:nandananushil1

Accepted Solution

Jezbit earned 2000 total points
ID: 33613287
It's extremely difficult to prevent people that really want a copy of your image... consider a screenshot tool, no script will block it.

Check out this link for some decent ideas though: http://www.webresourcesdepot.com/10-ways-to-protect-images-from-being-stolen/

There are some additional PHP solutions listed... watermarking is probably the best solution, that way even if it is copied (downloaded or screenshot), your watermark will be there.
LVL 10

Expert Comment

ID: 33616977
another way to do what you whant it's to try to see in your script who it's accesing the script - if it's the ip of your webserver then it's on if it's another ip then block it.

you can use the $_SERVER['REMOTE_ADDR'] to find out the adress of the client that it's trying to access your script

the basic ideea is like

if ($_SERVER['REMOTE_ADDR']==$your_server_ip){
// display the image

echo "you don't have rights to see this image";

hope this helps

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