htaccess get domain name from %{HTTP_HOST} into variable, minus the www

Question

I currently have the following in a htaccess file which redirects certain requests to the requested domain\'s individual folder if the file does not exist in the root..

Answer 1

You can capture the needed host part with a RewriteCond and use it as %1 in the RewriteRule

RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$
RewriteRule ^$ ASSETS/%1/index.php [L]

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An alternative solution at the file system level (without htaccess) might be symbolic links. Instead of extracting the necessary host part, have symbolic links to the real directory, e.g.

- ASSETS -+-domain1.com (directory)
          |
          +-www.domain1.com -> domain1.com (symbolic link)
          |
          +-domain2.com (directory)
          |
          +-www.domain2.com -> domain2.com (symbolic link)