Authenticating users using the database
As we know, a basic login form and user authentication process was created for us simply by using the yiic command to create our new application. This authentication scheme is very simple. It interrogates the input form username/password values, and if they are either demo/demo or admin/admin, the authentication passes, otherwise it fails. This is obviously not intended to be the long term solution, but rather a foundation on which to build. We are going to build upon this by altering the authentication process to use our user database table that we already have as part of our model. But before we start changing the default implementation, let's take a closer look at how Yii implements an authentication model.
Introducing the Yii authentication model
Central to the Yii authentication framework is an application component, called user, which, in the most general case, is an object implementing the IWebUser interface. The specific class used by our default...
