# force www in url
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.example\.com [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [R=301,L]
# END force www in url

http://www.torkiljohnsen.com/2008/01/16/some-easy-use-of-mod_rewrite/

Using mod_rewrite in Apache to rewrite urls and force users to use www in urls. Good for letting search engine spiders in the right door...

Insert the code in your .htaccess-file in your website's root folder.

Force WWW in url

url, htaccess, apache

Apache