Top 25 Laravel Questions and Answers
Laravel is one of the most popular PHP frameworks used by developers worldwide to build modern, robust, and scalable web applications. Whether you’re a beginner or an experienced developer, preparing for a Laravel interview can be challenging without the right guidance. In this post, we’ve compiled the top 25 Laravel interview questions with detailed explanations and practical examples to help you crack your next interview with confidence. From core concepts like MVC architecture, routing, middleware, to advanced topics like Eloquent ORM, queues, events, and service providers, this guide covers it all. Let’s dive in and strengthen your Laravel knowledge!
1. What is Laravel?
Laravel is a free, open-source PHP framework for web applications. It follows the MVC (Model-View-Controller) pattern and is known for elegant syntax, built-in authentication, routing, session handling, caching, and more.
Example:
command to creates a new Laravel project named “blog”
composer create-project –prefer-dist laravel/laravel blog
2. What are the main features of Laravel?
- MVC Architecture Support
- Eloquent ORM
- Routing
- Blade Templating Engine
- Authentication & Authorization
- Artisan Command-Line Interface
- Migrations & Seeders
- Task Scheduling
- Event Broadcasting
Example:
// Defining a route in Laravel
Route::get(‘/hello’, function () {
return ‘Hello, Laravel!’;
});
3. What is MVC Architecture?
MVC stands for:
- Model: Handles data and database operations.
- View: Displays the UI.
- Controller: Acts as the intermediary between Model and View.
Example:
// Example controller action
public function show($id) {
$user = User::find($id);
return view(‘user.profile’, [‘user’ => $user]);
}
4. What is Routing in Laravel?
Routing maps URLs to controllers or closures. Laravel’s routing is simple and powerful.
Example:
Route::get(‘/home’, [HomeController::class, ‘index’]);
Route::post(‘/submit’, function () {
return ‘Form submitted!’;
});
5. What is Middleware in Laravel?
Middleware filters HTTP requests entering the application. Common use-cases are authentication and request modification.
Example:
php artisan make:middleware CheckAge
In CheckAge.php:
public function handle($request, Closure $next)
{
if ($request->age <= 18) {
return redirect(‘home’);
}
return $next($request);
}
6. What is CSRF Protection?
CSRF (Cross-Site Request Forgery) protection prevents unauthorized commands from being submitted from another site.
Example:
In forms, always include:
<form method=”POST” action=”/submit”>
@csrf
<input type=”text” name=”name”>
<button type=”submit”>Submit</button>
</form>
7. What is Eloquent ORM?
Eloquent ORM is Laravel’s ActiveRecord implementation for database operations.
Example:
// Fetch all users
$users = User::all();
// Insert a new record
$user = new User;
$user->name = ‘John’;
$user->email = ‘john@example.com’;
$user->save();
8. What are Migrations in Laravel?
Migrations allow version control for the database schema.
Example:
php artisan make:migration create_posts_table
In the migration file:
Schema::create(‘posts’, function (Blueprint $table) {
$table->id();
$table->string(‘title’);
$table->text(‘content’);
$table->timestamps();
});
Run migration:
php artisan migrate
9. What are Seeders in Laravel?
Seeders populate tables with test or dummy data.
Example:
php artisan make:seeder UserSeeder
In UserSeeder.php:
DB::table(‘users’)->insert([
‘name’ => ‘Demo User’,
’email’ => ‘demo@example.com’,
‘password’ => bcrypt(‘password’)
]);
Run command:
php artisan db:seed –class=UserSeeder
10. How to validate form data in Laravel?
Laravel provides an easy way to validate form inputs.
Example:
public function store(Request $request)
{
$validated = $request->validate([
‘name’ => ‘required|max:255’,
’email’ => ‘required|email’,
‘password’ => ‘required|min:6’,
]);
}
11. How to create a controller in Laravel?
You can create a controller using Artisan:
php artisan make:controller UserController
Example:
class UserController extends Controller {
public function index() {
return view(‘users.index’);
}
}
12. How to define a resource controller?
A resource controller handles all CRUD routes automatically.
php artisan make:controller PostController –resource
Route:
Route::resource(‘posts’, PostController::class);
13. What are Blade Templates?
Blade is Laravel’s templating engine that allows logic in views.
Example:
<!– resources/views/welcome.blade.php –>
<h1>Hello, {{ $name }}</h1>
@if($user->isAdmin())
<p>Admin Access</p>
@endif
14. How to use session in Laravel?
Laravel allows storing and retrieving session data easily.
Example:
// Store data
session([‘user_id’ => 5]);
// Retrieve data
$userId = session(‘user_id’);
// Forget data
session()->forget(‘user_id’);
15. How to send email in Laravel?
Laravel uses the Mail facade to send emails.
Example:
use Mail;
Mail::to(‘test@example.com’)->send(new \App\Mail\WelcomeMail());
16. How to validate form data in Laravel using Validator?
You can also use the Validator facade.
Example:
use Illuminate\Support\Facades\Validator;
$validator = Validator::make($request->all(), [
‘name’ => ‘required’,
’email’ => ‘required|email’,
]);
if ($validator->fails()) {
return redirect()->back()->withErrors($validator);
}
17. What is a Service Provider in Laravel?
Service providers are used to register services or bindings in the service container.
Example:
- Found in app/Providers.
- Example: You can bind classes in AppServiceProvider.
public function register() {
$this->app->bind(‘App\Services\PaymentGateway’, function ($app) {
return new PaymentGateway();
});
}
18. What are Events and Listeners in Laravel?
Events provide a simple observer implementation.
Example:
Creating an event:
php artisan make:event OrderShipped
Creating a listener:
php artisan make:listener SendShipmentNotification –event=OrderShipped
19. What are Queues in Laravel?
Queues allow tasks to run in the background.
Example:
php artisan queue:work
Dispatching a job:
dispatch(new \App\Jobs\SendEmailJob($user));
20. What is Artisan in Laravel?
Artisan is the CLI tool for running commands.
Example:
php artisan list
php artisan make:model Product
21. How to create and use a custom helper in Laravel?
Step 1: Create a helpers.php file in app/Helpers/.
Step 2: Add your function:
function formatDate($date) {
return \Carbon\Carbon::parse($date)->format(‘d-m-Y’);
}
Step 3: Include in composer.json:
“autoload”: {
“files”: [
“app/Helpers/helpers.php”
]
}
Run command:
composer dump-autoload
22. What is a facade in Laravel?
Facades provide a “static” interface to classes in the service container.
Example:
use Illuminate\Support\Facades\Cache;
Cache::put(‘key’, ‘value’, 600);
23. What is dependency injection in Laravel?
Laravel automatically resolves dependencies from the service container.
Example:
public function __construct(UserRepository $userRepo) {
$this->userRepo = $userRepo;
}
24. How to use pagination in Laravel?
Example:
$users = User::paginate(10);
return view(‘users.index’, compact(‘users’));
In Blade view:
{{ $users->links() }}
25. How to define relationships in Eloquent?
Example:
- One to Many:
public function posts() {
return $this->hasMany(Post::class);
}
- Belongs To:
public function user() {
return $this->belongsTo(User::class);
}
We hope this comprehensive list of the top 25 Laravel interview questions with detailed answers and examples has helped you gain a deeper understanding of Laravel’s features and best practices. Whether you’re preparing for an interview or just brushing up your skills, mastering these concepts will give you a strong edge in building professional, high-performance Laravel applications.