.htaccess #redirect #non-www

RewriteCond %{HTTP_HOST} !^www\.
RewriteRule (.*) http://www.giant9.com/$1 [R=301,L]

or

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