Laravel Interview Questions and Answers

What is Laravel?

Laravel is a free, open-source PHP framework used to build web applications. It follows the MVC (Model-View-Controller) architectural pattern and provides elegant syntax, tools like routing, authentication, ORM (Eloquent), templating engine (Blade), and more to streamline development.

What are the pros and cons of using the Laravel Framework?

The pros and cons of the Laravel Framework are:

Pros

The blade template engine speeds up tasks like compilation and allows users to add the latest features easily.
Bundled modularity allows the reuse of code without any trouble.
It is easy to understand and create database relationships.
The Artisan CLI comprises advanced tools for tasks and migrations.
The documentation allows reverse routing.
Strong ecosystem (Laravel Nova, Vapor, Forge, etc.)
Active community and regular updates
Built-in testing support
Queues, jobs, events, broadcasting

Cons

It can be slow.
It is a new platform for many developers.
It gets challenging to extend codes and classes for amateurs.
Limited community support compared to other platforms.
Reverse routing and other methods are pretty complicated.
May have a steeper learning curve for complete beginners
Overhead compared to lightweight frameworks
Performance could be slower in large-scale applications without optimization

Describe Events in Laravel?

Events in Laravel are observer implementations that allow subscription to events as well as listen to updates about different events within the application. The event classes are saved in the app/Events directory and the listeners are saved in app/Listeners. They may be generated with the help of Artisan console commands. They go a long way in decoupling several aspects of an application due to the multiplicity of listeners for a single event.

How to check Laravel version?

Run this command:

php artisan --version

What are Validations?

Validations are approaches used by Laravel to validate incoming data within an application. The base controller class of Laravel uses the trait ValidatesRequests by default to validate an incoming HTTP request with the help of powerful validation rules.

How to create a controller in Laravel?

To create a controller in Laravel run this command:

php artisan make:controller UserController

Example

namespace App\Http\Controllers;

use App\Models\User;
use Illuminate\Http\Request;

class UserController extends Controller
{
    public function show($id)
    {
        return view('user.profile', ['user' => User::findOrFail($id)]);
    }
}

How to remove public from URL in Laravel?

The steps to remove the public from URL in Laravel are-

Rename the file in the Laravel root directory.
Update the .htaccess in the root folder using the code-

Options -MultiViews -Indexes

RewriteEngine On

# Handle Authorization Header

RewriteCond %{HTTP:Authorization} .

RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

# Redirect Trailing Slashes If Not A Folder...

RewriteCond %{REQUEST_FILENAME} !-d

RewriteCond %{REQUEST_URI} (.+)/$

RewriteRule ^ %1 [L,R=301]

# Handle Front Controller...

RewriteCond %{REQUEST_URI} !(.css|.js|.png|.jpg|.gif|robots.txt)$ [NC]

RewriteCond %{REQUEST_FILENAME} !-d

RewriteCond %{REQUEST_FILENAME} !-f

RewriteRule ^ index.php [L]

RewriteCond %{REQUEST_FILENAME} !-d

RewriteCond %{REQUEST_FILENAME} !-f

RewriteCond %{REQUEST_URI} !^/public/

RewriteRule ^(css|js|images)/(.*)$ public/$1/$2 [L,NC]

What is middleware in Laravel?

Middleware in Laravel is a bridge that connects a request to a response. It filters and verifies the authentication of the user of the application. Only the authenticated users are redirected to the home page. Middleware can care handle CORS, CSRF, roles, etc.

How to update composer in Laravel?

The steps to update the composer in Laravel are:

In the composer.json file at the root of your git repo, run the composer update.
Re-generate the composer.lock file.
Transfer the composer.lock file to the git repository.
Click on 'Tools in the Engine Yard Cloud' and go to Dashboard.
Select an environment name.
Click on Deploy.

How to run Laravel project in xampp?

The steps to run Laravel in xampp are-

Install XAMPP on the C drive.
Create a Laravel folder in htdocs under the XAMPP folder in the C drive.
Redirect to Laravel with the CMD prompt.
Use the below command

composer create-project laravel/laravel first-project --prefer-dist

Redirect to localhost/laravel/first-project/public/.

Note:

Ensure PHP version is 8+ for Laravel 10
Enable required PHP extensions in php.ini (like openssl, mbstring, pdo, etc.)

How to clear cache in Laravel?

The syntax to clear the cache in Laravel is:

php artisan cache: clear
php artisan config: cache
php artisan route: cache
php artisan view:clear
php artisan config:clear

What is Homestead Laravel?

Laravel Homestead is the official, pre-packaged, disposable Vagrant box that delivers a development environment to use without the additional need to install PHP, a web server, or any other server software on the machine.

What is a namespace in Laravel?

Namespaces in Laravel are used to group classes logically and avoid name collisions. They're also essential for autoloading and following PSR-4 standards.

How to use curl in Laravel?

In Laravel (version 7 and above), the recommended way to make HTTP requests like cURL is by using Laravel's built-in HTTP client, which is a wrapper around Guzzle.

Using Laravel's HTTP Client (preferred):

use Illuminate\Support\Facades\Http;

$response = Http::get('https://api.example.com/data');

$data = $response->json(); // Parse the JSON response

For POST requests:

$response = Http::post('https://api.example.com/user', [
    'name' => 'John Doe',
    'email' => 'john@example.com',
]);

This method provides a clean syntax and built-in support for error handling, retries, and more.

Using native cURL in Laravel (not recommended unless necessary):

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'https://api.example.com/data');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);
curl_close($ch);

$data = json_decode($response, true);

Note: Although Laravel supports traditional cURL, it's better to use the Http facade for more readable, testable, and feature-rich code.

What is a facade in Laravel?

A facade in Laravel is a class that allows static-like interface for the services in a container. They serve as a proxy, depending on the documentation, to access the core implementation of the services of the container.

What is Laravel Route?

A Route is a process which is used to send all your application URL to the associated controller function. The most primary or basic routes in Laravel simply take URI and its Closure.

What is a migration in Laravel?

Migrations in Laravel refer to files that comprise of class definitions along with an up() and down() method. The up() method is executed when the relates to changes in the database while the down() method helps to undo the changes.

Note: To update databases, new migrations must be created.

What is CSRF token in Laravel?

Cross-Site Forgery or CSRF in Laravel detect unauthorized attacks on web applications. by the authenticated users of a system. The built-in CSRF plug-in created CSRF tokens to verify all operations and requests sent an active authenticated user.

What is Eloquent ORM in Laravel?

The Eloquent ORM in Laravel is a built-in ORM implementation that permits working database objects and relationships through eloquent and easy-to-read syntax. It assumes the id as the primary key for a record and that the model is representing a table with an id field.

What is Laravel Forge?

Laravel Forge is a tool that helps in organising and designing a web application. Although the manufacturers of the Laravel framework developed it, it can automate the deployment of every web application that works on a PHP server.

What are the differences between Codeigniter and Laravel?

The differences between Codeigniter and Laravel are-

Codeigniter	Laravel
It follows the development principle Wiky Way.	It follows the development principle Don’t Repeat Yourself.
It can produce active-record, model-view-controller and HMVC design patterns.	It can produce active-record, model-view-controller, dependency injection, singleton, observer, event-driven, MTV, factory, restful, facade and HMVC design patterns.
It needs 256 MB memory.	It needs 1 GB memory.
It is recommended for beginners.	It is useful for all categories of developers from novice to pro.
It does not support ORM.	It supports ORM.
It does not have inbuilt user authentication.	It has built user authentication.
Inbuilt CLI support absent.	Inbuilt CLI support present.

How to create middleware in Laravel?

The command used to create middleware in Laravel is:

php artisan make: middleware <middleware-name>.

Top Laravel Interview Questions and Answers (Updated)