What are the best practices for implementing user authentication and authorization in PHP?

Implementing user authentication and authorization in PHP involves verifying the identity of users and determining what actions they are allowed to perform within an application. Best practices include using secure password hashing algorithms, storing user credentials securely, and implementing role-based access control to restrict user permissions. 

// User authentication
if ($_POST['username'] == 'admin' && password_verify($_POST['password'], $hashedPassword)) {
    $_SESSION['user'] = 'admin';
    // Redirect to the dashboard or authorized page
} else {
    // Display error message
}

// User authorization
if ($_SESSION['user'] == 'admin') {
    // Allow access to admin-only functionality
} else {
    // Redirect to a restricted access page or display an error message
}

Keywords

password hashing session management role-based access control JWT tokens CSRF protection

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