Open image in a page if users try to access directly [closed] - php

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One thing I've noticed on Facebook is when you access an image/video directly, you can view it, even if the uploader specifies that you're not able to see it.
So I was thinking. Is it possible to redirect any image that is accessed directly (eg. www.example.com/img.jpg) to a page that has that image on? So say you were to access www.example.com/img.jpg, it'd redirect to a specific page for that image (perhaps the page is named after the image or something, so like it'd redirect to www.example.com/img.php).
I imagine it could possibly be done with .htacces, but I'm not advanced with that.
Anyone ever achieved this before and know if it's possible?

Answer 1

Something like this:
RewriteEngine On
RewriteCond %{HTTP_REFERER} !^https?://(www\.)?example\.com/ [NC]
RewriteRule ^(.*)\.(jpe?g|gif|png)$ /$1.php [L,R]
redirects any request for an image that isn't referred to by your site (www.example.com) to the image's name but with a .php extension instead.
Of course, this only works if you have a php file named after each of your images. If you want just a single script to process all your images (might be easier if you have a lot of images), you can do something like this:
RewriteEngine On
RewriteCond %{HTTP_REFERER} !^https?://(www\.)?example\.com/ [NC]
RewriteRule ^(.*\.(jpe?g|gif|png))$ /image_page.php?image=$1 [L,R]
And you'll have a script image_page.php take the $_GET[] parameter "image". And you can output a page that links to the image.
If you'd rather not redirect the browser, just remove the ,R flag inside the square brackets.