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CSC2720 Assignment #2 Due: 26th Feb 2010

Objective

The objective of this assignment is to let you practice using different methods to maintain application

states across multiple server-side scripts.

Specification

Let M= number of items to be listed per page by "list.php".

Implement four PHP scripts that behave similarly to

1) http://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/login.php

- If the request method is POST

o Retrieve the user-id and password from the request

o If the user-id and the password pass the authentication

Display a welcome message

Else

Display an error message and ask the user to re-enter the user-id and password

- If the request method is GET

o If a user is already logged on

Display a welcome message

Else

Ask the user to enter a user-id and password

2) http://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/setting.php

- If the user has not yet logged in

o Ask the user to log in first

- Else

o Retrieve the value ofMfrom cookieo If the cookie does not exist, set M to 20

o If the request method is POST

Override Mwith the value retrieved from the request

o IfM< 5, set M to 5

o Update the value ofM in the cookie

o Use a text field (with initial value set to M) to collect a new value ofMfrom the user

http://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/login.phphttp://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/setting.phphttp://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/login.phphttp://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/setting.php

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3) http://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/list.php

- If the user has not yet logged in

o Ask the user to log in first

- Else

o Retrieve the value ofMfrom cookie

o If the cookie does not exist, set M to 20

o Display M records on the selected page. (Default is page 1)

All except the last page should contain exactly M records. Last page can contain

less than M records.

o Display at the bottoms some links or buttons to allow the user to access different pages

4) http://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/logout.php

- If a user is currently logged in

o Log the user out

- Redirect the client to login.php

TOP Menu

"login.php", "setting.php", and "list.php" share the same top menu, and the menu has the following

behavior:

- If a user is currently logged in

o Display "Hi! " in the first menu itemo Display a link to "logout.php" in the 4th menu item

- Else

o Display a link to login.php in the first menu item

o Do not show anything in the 4 th menu item

Users

The two sets of user name and password are:

1) User name: john, password: 1232) User name: jane, password: 456

http://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/list.phphttp://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/logout.phphttp://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/list.phphttp://www.cse.cuhk.edu.hk/~cjyuan/csc2720/asgn2/logout.php

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Note s:

1. Your web application does not need to look exactly the same as the sample web application.

2. The file asgn2_inc.php contains

a. getdata() a function that returns an array of 212 randomly generated records as an

array of arrays. The following example illustrates how you can manipulate the returned

value:

b. login() a function that can be used to authenticate the user.

3. If you make any assumptions in your implementation, please type them in a separate text file

named "readme.txt".

4. You may introduce additional files as you see fit. For examples, a CSS file, a PHP script that

implements the top menu, etc.

What to submit?

Zip all your files, including "asgn2_inc.php", into "asgn2.zip and submit the file to Moodle.