Force www Into URL
In this quick web development tip we discuss the apache method of forcing script connection in case the www is missing from a URL that requires it for script connection and session handling.
.htaccess
RewriteEngine on
# Make all requests have the www. in the URL
RewriteCond %{HTTP_HOST} ^websitename\.com
RewriteRule ^(.*)$ http://www.websitename.com/$1 [R=permanent,L]