If you want to redirect all non-www requests to your site to the www version, all you need to do is add the following code to your .htaccess file:
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$
http://www.%{HTTP_HOST}/$1 [R=301,L]
but when i do this xxx.com/picture.html returns to
www.xxx.com/details=php? etc...
how can i protect the real permalink of a page?