What considerations should be taken into account when integrating a CMS with a PHP application to ensure proper file access control?

When integrating a CMS with a PHP application, it is essential to ensure proper file access control to prevent unauthorized users from accessing sensitive files. One way to achieve this is by implementing role-based access control (RBAC) where users are assigned specific roles with corresponding permissions to access certain files or functionalities. This can be done by checking the user's role before allowing access to files within the PHP application.

// Check user's role before allowing access to files
$userRole = getUserRole(); // Function to retrieve user's role

if($userRole == 'admin'){
    // Allow access to sensitive files
    include 'sensitive_file.php';
} else {
    // Redirect unauthorized users
    header('Location: unauthorized.php');
    exit();
}