Redirect requests to non-www to www

Masuk ke cpanel
Cari file .htaccess
Edit dengan filemanager di web.

Copikan script berikut ini :

# Require WWW
# Will automatically redirect requests to non-www to www
# This will exempt robots.txt for search engines

Options +FollowSymLinks
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_URI} !^/robots\.txt$
RewriteCond %{REQUEST_URI} !^/sitemap\.(xml|xml\.gz)$
RewriteCond %{HTTP_HOST} ^([^.]+)\.([^.]+)$ [NC]
RewriteRule ^(.*)$ http://www.%1.%2/$1 [R=301,L]

Semoga berhasil. :)