How can user groups be effectively managed in PHP to assign specific page permissions?

To effectively manage user groups in PHP to assign specific page permissions, you can create a database table that stores user groups and their corresponding permissions. When a user logs in, you can retrieve their group permissions from the database and use them to determine if they have access to a specific page.

// Sample code to check user permissions for a specific page
$userGroup = getUserGroupFromDatabase($_SESSION['user_id']);

if (checkPagePermission($userGroup, 'admin')) {
    // User has permission to access admin page
    header('Location: admin.php');
} else {
    // User does not have permission to access admin page
    header('Location: unauthorized.php');
}

function getUserGroupFromDatabase($userId) {
    // Query the database to retrieve user group based on user ID
    // Return user group
}

function checkPagePermission($userGroup, $requiredPermission) {
    // Check if user group has the required permission to access the page
    // Return true if user has permission, false otherwise
}