PHP Sessions

Let's consider parameter use on the example of a site employing authorization procedure. When a user enters his or her name, a session must be initiated. This allows us to use session variables. A session is initiated by the session_start() function. If the function executes successfully, it returns true; otherwise, false is returned.

Now the PHP interpreter has to be informed which variables are to be saved in the session. This is done using the session_register() function, to which the variable name to be saved is passed as the parameter. Afterward, all the variables that have been placed into the session will be available from all pages of your site for the duration of the session.

Let's consider an example of a session. We'll create a file named session.php for this. The file contains a form to enter the user name, which will be saved in a session variabl: