How can PHP frameworks facilitate modular development and enhance code reusability?

PHP frameworks facilitate modular development and enhance code reusability by providing a structured way to organize code into separate modules or components. This allows developers to easily reuse code across different projects, saving time and effort. Additionally, frameworks often come with built-in libraries and tools that help streamline development tasks and enforce best practices. Example PHP code snippet: ``` // Using Laravel framework to demonstrate modular development and code reusability // Define a UserController class in app/Http/Controllers directory namespace App\Http\Controllers; use App\User; use Illuminate\Http\Request; class UserController extends Controller { public function index() { $users = User::all(); return view('users.index', ['users' => $users]); } } // Reusing the UserController in a different part of the application namespace App\Http\Controllers\Admin; use App\Http\Controllers\UserController; class AdminController extends Controller { public function showUsers() { $userController = new UserController(); return $userController->index(); } } ```