PHP code for anti hotlinking

Question

In our sites we are doing a image protection section. So as a part of image protection we need provide antihotlinking for images.In our site we are showing the image using a

Answer 1

basic .htaccess example

RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?yourdomain.com [NC]
RewriteRule \.(jpg|jpeg|png|gif)$ - [NC,F,L]

above allows a blank REFERER (like me).

this does not:

RewriteEngine on
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?yourdomain.com [NC]
RewriteRule \.(jpg|jpeg|png|gif)$ - [NC,F,L]

there are quite a few variations you can find, may need to play around a bit to find what is best for you.