2. Model-View-Controller
• Model: Code to process, retrieve, and store data on a server (PHP,
MySQL)
• View: Renders the Model into a website (XHTML, CSS)
• Controller: Processes user input (JavaScript, PHP, XHTML)
CGS2835 WebDev
3. Model-View-Controller
User input (click a link, submit a form)
PHP/JavaScript
Adds/Removes data from the Database
Shows a webpage
Updates information to the webpage
What you see Database
Requests Data from the database
http://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller
CGS2835 WebDev
4. Model
• MySQL Database
– Tables and Fields to store data
• What kind of information would you need to
store for a social net?
CGS2835 WebDev
5. Model
• TABLE: users
– userID, username, password, picture
• TABLE: posts
– userID, post, time
• TABLE: friends
– user, friend
CGS2835 WebDev
6. Model
• database_queries.php
– MySQL queries to put and get data
– Handles all database access
• connect.php
– Connection functions in one place
• security.php
– Functions for sanitization of input
– Functions for password hashing
– Functions for user authentication
CGS2835 WebDev
7. View
• What things do all pages need to see?
• top.php
– The top navigation bar of all pages
– Specifies the style sheet to be used “style.css”
– Included on all view pages with
• <?php include(“top.php”); ?>
CGS2835 WebDev
8. View
• index.php: Main page
• user.php?userID=
– Choosing a user profile to show using $_GET
– $_GET is like $_POST except it gets information after
the ? in the address instead of a form that posts
information
– Shows a user’s page, their posts and information
– Shows a form to make a post on a user page
• user_form.php
– Shows the forms for making a new user and logging in
CGS2835 WebDev
9. Controller
• Handles $_POST from forms and sends the
data to database_queries.php functions
• newuser_process.php
– Processes the new user form
• user_process.php
– Processes the user login form
• post_process.php
– Processes the user post form
CGS2835 WebDev
