When should sessions be used in PHP to store and pass variables between pages?

Sessions should be used in PHP to store and pass variables between pages when you need to maintain data across multiple page loads for a specific user. This is useful for scenarios like user authentication, shopping carts, and user preferences. Sessions provide a way to store data on the server side and associate it with a specific user, allowing you to access this data across different pages during the user's session. 

// Start the session
session_start();

// Set a session variable
$_SESSION['username'] = 'JohnDoe';

// Access the session variable on another page
session_start();
echo $_SESSION['username'];

Keywords

sessions PHP variables pages storage

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