Question

How can I access the matched variable in the a rule like this one ?

RewriteCond %{HTTP_REFERER} ^http://example\.com/dir[0-9]/?(.*)?$
RewriteRule ^images/(.*)$ other_dir(MATCHED_STRING)/images/$1 [L]

I would like the url : http://example.com/dir1
to redirect all its images to /other_dir1/images/$1

Answer 1

Use the % to access back refernces from a RewriteCond. So in your example:

RewriteCond %{HTTP_REFERER} ^http://example\.com/dir[0-9]/?(.*)?$
RewriteRule ^images/(.*)$ other_dir%1/images/$1 [L]

The %1 will be replaced with what was matched in the RewriteCond in the HTTP referer.