non-www to www using mod_rewrite !

[Rock]

To redirect or rather rewrite a non-www URL for your web site hosting to a www one on an Apache Server, using Apache Mod_rewrite, place this code in your domain's .htaccess file:

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

OR

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

Enjoy...