Apache mod_rewrite: force www only if not in localhost

Question

I have the following in my htaccess to force the www in URLs:

RewriteCond %{HTTP_HOST} !^www\\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
         


        

Answer 1

If you're using a port other than 80 (e.g. localhost:8080) you might need to add it to the regex too:

RewriteCond %{HTTP_HOST} !^localhost(?::\d+)?$ [NC]
RewriteCond %{HTTP_HOST} !^127\.0\.0\.1(?::\d+)?$