Redirect the non-www version of the site to the www

by

This code is similar to Eugene’s, but it will redirect any domain that is not your main domain with “www” to the correct address. Handy if you have multiple top-level domains.

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

# These are the lines that do the trick
RewriteCond %{HTTP_HOST} !^www\.yourdomain\.com$
RewriteRule .* http://www.yourdomain.com/$0 [L,R=301]
</IfModule>