Unit 5 PHP

What is a session in web development?

• A session is a temporary interaction between a user and a web application that stores user-specific data.

• A session is a permanent storage of user data on the server.

• A session is a type of database used for web applications.

• A session is a method for encrypting user passwords.

How do you create a session in PHP?

• Invoke session_init() to set up a session in PHP.

• Use session_create() to initiate a session in PHP.

• Call start_session() to begin a session in PHP.

• Use session_start() to create a session in PHP.

What function is used to destroy a session in PHP?

• session_destroy()

• end_session()

• destroy_session()

• session_end()

What is the purpose of session variables?

• The purpose of session variables is to maintain state and store user-specific data across multiple requests.

• To manage database connections.

• To store global application settings.

• To enhance the performance of the server.

How can you retrieve a session variable in PHP?

• Access session variables using $session['variable_name'].

• Use $_SESSION['variable_name'] without calling session_start().

• Use $_SESSION['variable_name'] after calling session_start().

• Retrieve session data with session_get('variable_name').

What happens to session data when a session is destroyed?

• Session data is transferred to a different session upon destruction.

• Session data is saved for future use after destruction.

• All session data is deleted and cannot be accessed after the session is destroyed.

• Only some session data is deleted, while others remain accessible.

What is a cookie in web development?

• A cookie is a programming language.

• A cookie is a type of web server.

• A cookie is a small piece of data stored on the user's computer by the web browser.

• A cookie is a database for storing user information.

How do you set a cookie in PHP?

• setcookie('cookie_name', 'cookie_value', time() + 3600);

• set_cookie('name', 'value', time() + 1800);

• cookie_set('name', 'value', 3600);

• setcookie('name', 'value');

What is the maximum size of a cookie?

• 8KB (8192 bytes)

• 2KB (2048 bytes)

• 4KB (4096 bytes)

• 1MB (1048576 bytes)

How can you retrieve a cookie value in PHP?

• $_SESSION['cookie_name']

• $_COOKIE.get('cookie_name')

• get_cookie('cookie_name')

• $_COOKIE['cookie_name']