Currently im just using something like:

in the DB Table:

access: home,register,login

and then in each page:

if(!Functions::has_rights('content'))
{
     Functions::noAccess();
}

is there more efficient way to do it, php & MySQL? i may want to gain access even to several parts a page, for example: user can read a page, but doesnt comment to it, and I dont want to build a separate system to each module.

Thanks in advanced, Tal.