Redirect non-www Traffic to www Using mod_rewrite

This is an example using the mod_rewrite Apache module to force all traffic to your site to www.yourdomain.com. This can be useful in an SSL context, as well as for SEO purposes. Create a .htaccess file in your webroot (public_html for cPanel servers) and add the following lines:

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