How can PHP developers avoid the issue of inaccessible modules in the administration area?

Issue: PHP developers can avoid the issue of inaccessible modules in the administration area by implementing proper access control mechanisms. This can be achieved by checking the user's role or permissions before allowing access to specific modules.

// Check user's role or permissions before accessing a module
if($user->role == 'admin'){
    // Code to access the module
} else {
    // Redirect or show an error message
    echo "You do not have permission to access this module.";
}