PHP Sessions and Session Handling

Session

Is a way to store user information on the server side so it can be used across multiple pages.

Cookie

Is a small piece of data stored on the user's browser (client-side) and sent to the server with every request.

1. Server

2. More Secure

3. Until browser closes

4. Login Systems

5. Larger

Key Concepts of Session

1. Client Browser

2. Less secure

3. Can persist

4. Preferences

5. Limited (~4kb)

Key Concepts of Cookies

1. Start Session

2. Store Data

3. Access Data

4. Destory Session

Session Lifecycle

session_start()

Code for Start Session

session_destroy()

Code of Destroy session

$_SESSION

Code for Store Data

$_SESSION

Code for Access Data

unset($_SESSION[]);

Code for unset a Session