How to specify domain for hot-link block dynamically?

Question

PHP

Hello.
There is:

RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?yourdomain.com [NC]
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?yourdomain2.com [NC]
RewriteRule \.(jpg|jpeg|png|gif)$ http://hpmouse.googlepages.com/hotlink.gif [NC,R,L]

Necessary:

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

How to get [] so that the rule depends on the domain where this .htaccess is currently located?
Thank you!

Answer 1

Answer here