htaccess - get all non-www traffic redirected to the www

Question

Can anyone suggest how I get non www traffic to redirect to the www version of a website using the htaccess file - I know I have one created in my root directory but cannot be sure what to put.. any ideas

Answer 1

Relatively easily.

Match anything that does not begin with 'www.' and then redirect to the 'www.' version:

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