.htaccess redirect - automatically add www. if no subdomain exists

.htaccess redirect mod-rewrite subdomain
kdjernigan picture kdjernigan · Sep 4, 2012 · Viewed 39.3k times · Source

I need any www. added automatically to my domain ONLY IF a subdomain is not already there. I do want subdomains to bypass this redirect.

How can I do this?

Answer

Jon Lin picture Jon Lin · Sep 4, 2012

To automatically add a www to your domain name when there isn't a subdomain, add this to the htaccess file in your document root:

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

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