Solution to Question 13-1
Cookies are stored on the web user's hard drive.
Solution to Question 13-2
The md5() function creates a one-way encoding of the password.
Solution to Question 13-3
To store the value 1 in the user_id session variable, specify:
<?php session_start(); $_SESSION['user_id'] = 1; ?>
Solution to Question 13-4
Display the value stored in the user_id session variable as follows:
<?php session_start(); echo $_SESSION['user_id']; ?>
