.htaccess Redirect non-WWW to WWW preserving URI string

Question

I\'m running the CodeIgniter platform, which uses .htaccess to accept URLs like

http://www.mysite.com/controller/function/argument

I curren

Answer 1

It should be something like this:

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