In a PHP application with a role-based user permission system, what are some best practices for managing user permissions and rights to ensure data integrity?

To ensure data integrity in a PHP application with a role-based user permission system, it is important to properly manage user permissions and rights. This can be achieved by assigning specific permissions to each user role, implementing proper authentication and authorization mechanisms, and regularly reviewing and updating user permissions as needed.

// Example code snippet for checking user permissions before accessing data
if ($user->hasPermission('view_data')) {
    // Code to retrieve and display data
} else {
    echo "You do not have permission to view this data.";
}