What are the best practices for managing sessions and session variables in PHP applications?

Sessions in PHP are a way to store user data across multiple pages or visits to a website. It's important to properly manage sessions and session variables to ensure security and efficiency in your application. Best practices include starting sessions at the beginning of each page, properly sanitizing and validating session data, and destroying sessions when they are no longer needed. 

// Start session at the beginning of each page
session_start();

// Set session variables
$_SESSION['username'] = 'example_user';
$_SESSION['email'] = 'example@example.com';

// Get session variables
$username = $_SESSION['username'];
$email = $_SESSION['email'];

// Destroy session when no longer needed
session_destroy();

Keywords

session management session variables PHP applications security data persistence

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