Hi carl6969 and lankatr, i think what lankatr wants is a .htaccess force www, it is below:
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www.example.com$
RewriteRule ^(.*)$ http://www.example.com/$1 [R=301]
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save the following to your .htaccess file via cPanel file manager. [remember to ckeck the box show hidden . files]