Problem
1. What are the two ways you can specify that a parameter is to be passed by reference?
2. How can a variable used outside a function be accessed by the function?
3. How can you define a variable in a function so that its lifetime extends beyond the time the function is in its first execution?
4. How can the value of a form element be accessed by a PHP script?
5. How can a cookie be created in a PHP script?
6. How can a script determine whether a particular cookie exists?
7. How can a variable be saved in a session?