There are two pair of classes here.

users implements a login class for PHP.
usersDataSourceMysqli implements the data access (ie, data back end)

usersPermissions extends users by adding logical permissions
usersPermissionsDataSourceMysqli extends usersDataSourceMysqli

This is a Users Login class for PHP, designed to be a self contained
system to handle user login and administration. It is also designed to
be programmatically modifiable by the programmer, ie adding new columns
is fairly simple.

Examples are in the examples directory. 
   UsersTest.php is a basic setup which automatically detects if the 
   table exists and, if not, creates it
   
   UsersTestExtended.php is an example of adding a new column to our
   table, giving the user some limitations on what they can access in
   our app.
   
   UsersInitDB.php creates and initializes the table structure for 
   UsersTestExtended.php as an example of using it in an installer.
   
   scripts containing the words Permissions are for the userPermissions
   class.

documentation contains users.class.txt and usersPermissions.class.txt 
which are the sources from our dokuwiki site

http://kb.unixservertech.com/software/dailydata/libraries/php_user

documentation also contains the directory phpDocumentor which is phpdoc 
output documenting the classes involved in HTML format (load the 
index.html file in your browser).