Applying Cookies and Sessions
This section demonstrates how you use cookies and sessions in a small login and user administration application. The web application is similar to the one in Chapter 11 but differs in how you authenticate users. Two forms are used in this application. One is a nonauthenticated SignOn.php file, and the other is an authenticated AddUser.php file.
The SignOn.php file is your preauthentication entry portal to the application. It is also your redirection target page when users fail to authenticate on other web pages. The SignOn.php form provides a generic login screen. The session will only start when the user attempts to authenticate. When the user clicks the Submit button, SignOn.php calls the AddUser.php form, which ...
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