Top 30 Most Frequently Asked Laravel Interview Questions

Laravel is one of the frequently used PHP frameworks. If you wish to continue your career as a PHP developer, you might encounter Laravel interview questions in technical interviews as well. In this article, we have listed Laravel interview questions and answers. 👇💼

 

Most Common Laravel Interview Questions

1. What is Laravel?

Laravel is a free and open-source PHP framework. It was developed by Taylor Otwell in 2011. It is specifically designed for developing web-based applications and follows the MVC architecture. It is suitable for creating simple and well-structured web applications.

Laravel uses Composer to manage project dependencies, allowing faster development of applications by utilizing ready-to-use packages, versions, and pre-built functionalities. It comes with an easy-to-learn blade templating engine, making it useful when working with PHP or HTML.

 

2. What is an event in Laravel?

Events are actions recognized and processed by the program. In Laravel, events are a way to notify that an action has occurred in the application.

All events in Laravel are stored in the app/Events directory and are listed in the app/listeners directory. An event can have multiple listeners associated with it, and when an event is dispatched, all listener classes are executed in the order they are matched. This means that when an event is triggered, the application can perform multiple tasks by triggering different listeners.

To create a new event class in the app\Events folder of the application, the following command is used 👇: 

Another way to create an event is to register events in the EventServiceProvider class and then dispatch them. 👇:

 

3. What are facades in Laravel?

Laravel facades provide a static interface for classes available within the application’s service container. Laravel facades offer more testability and flexibility compared to traditional static methods.

🎯 In Laravel, all facades are stored within the Illuminate\Support\Facades namespace.

 

4. What are Laravel Validation processes?

Laravel Validation is a simple and convenient feature used to validate data through the controller class (Validator class) and to obtain validation error messages.

The validation class validates incoming HTTP requests using the ValidatesRequests trait to validate incoming data.

 

5. What is Laravel form validation?

Laravel form validation is the process of checking whether the data submitted by the user through a web form meets certain rules or not. It also ensures the application is protected from malicious inputs.

👉 GET route is used to display the form.

👉 POST route is invoked when a user fills out and submits a form, and it displays the user’s submission.

 

6. What is Composer in Laravel?

Composer is a tool that helps in project creation by containing all dependencies and libraries. Using Composer, it is easy to install third-party libraries into the project. 

Once installed, Composer is automatically set up and ready to use system-wide. Composer is a tool commonly used during the development of modern PHP projects like Laravel.

 

7. How to install Laravel using Composer?

1️⃣ By typing “Composer create-project” in the terminal, you can install Laravel 👇:

 

2️⃣ After Composer is installed, download the required version of Laravel and transfer its contents to a directory on your server. Then, in the root directory of your Laravel application, run the following command to install all framework dependencies:

 

8. What is Middleware in Laravel?

Laravel Middleware is a convenient mechanism used to evaluate and filter incoming HTTP requests into the application. It acts as a bridge between the request and response. All Laravel Middleware are registered in the app/Http/Middleware directory.

📍 Laravel Middleware syntax: 

 

9. What is Laravel Eloquent?

Laravel Eloquent is a powerful feature known as Laravel's ORM (Object-Relational Mapping) system used to manage database interactions.

Eloquent facilitates the task of interacting with database tables. It provides an object-oriented approach to adding, updating, and deleting database records. It also offers an easy interface to execute complex SQL queries.

 

10. What is PHP artisan?

Artisan is a command-line interface included in Laravel. The advantages of Artisan are: 

• ✅ Artisan provides a range of useful commands that can help create the application.
• ✅ It offers a list of commands that simplify developers' tasks and save time.
• ✅ It allows developers to write custom commands.
• ✅ It increases the efficiency of the application. 

 

11. What are the Artisan commands?

To list all existing Artisan commands, the php artisan list command is used.

• make:channel - Creates a new channel class. 
• make:command - Creates a new Artisan command. 
• make:controller - Creates a new controller class. 
• make:event - Creates a new event class. 

• make:exception - Creates a new custom exception class.
• make:factory - Creates a new model factory.
• make :job - Creates a new job class. 
• make:mail - Creates a new mail class.
• make:migration - Creates a new migration file.
• make:notification - Creates a new notification class.

• make:policy - Creates a new policy class.
• make:provider - Creates a new service provider class.

• make:seeder - Creates a new seeder class.
• make:test - Creates a new test class.

• make:view - Creates a new view file.

 

 

12. How to create a custom Artisan command in Laravel?

To create a custom command in Laravel, type the following in the terminal 👇:

In the next step, the command is executed in the terminal:

After the execution process, a app/console/Commands file is created in the directory. The file will be named CreateEmployeeName.

 

13. What are Laravel packages?

Laravel has various modules that serve as packages. The Laravel Package Manager provides fast but simple package management for the Laravel project. These packages allow accessing databases and facilitate dependency injection.

One of the biggest benefits of using Laravel packages is that they provide access to all of Laravel’s features, such as routing, migrations, testing, views, and many other core functionalities. They also adhere to the DRY Principle, which reduces the amount of code and increases the sustainability of the application.

Developers in Laravel can create their own packages. However, many free Laravel packages available can be used instead of creating them from scratch. 

 

• ✔️ Spaces: Spaces is a package used to manage roles and permissions.
• ✔️ Laravel Debugbar: Helps users add a developer toolbar to the application and is used for debugging purposes.
• ✔️ Laravel User Authentication: This package allows performing user authentication and email verification.
• ✔️ Socialite:GitHub, and BitBucket.
• ✔️ Eloquent-Sluggable: This package allows creating URL-friendly versions by converting a string to lowercase and removing spaces.
• ✔️ No Captcha: It is a package that implements Google reCaptcha verification and protects forms from spam. 

 

14. What is a route in Laravel?

In Laravel, all requests are mapped through routes. Routes are used to direct incoming HTTP requests to specific actions. 

Routing in Laravel is divided into the following categories: 

1️⃣ Basic Routing

2️⃣ Route Parameters

3️⃣ Named Routes

 

15. What is basic routing in Laravel?

All application routes are registered in the app/routes.php file. This file tells Laravel the URIs that it needs to respond to.

 

16. What are Named Routes in Laravel?

Named routes or route naming is an important feature of Laravel. They provide an easy way to create routes. They allow you to reference routes when generating URLs or redirecting to specific routes. 

📍 The following code allows creating named routes with a controller.

 

17. What is Database migration and how to create a migration using Artisan?

Migration is a structure that allows easily modifying and sharing the application's database schema.

To create migration data, the php artisan command can be used 👇: 

 

18. What is reverse routing in Laravel?

Reverse routing in Laravel is the process of converting URL paths into identifiable names or controller methods. This allows for dynamic creation and modification of URLs.

For example, consider the following route definition:

 

Using reverse routing, you can dynamically generate URLs related to this route. 

 

19. What is the service container in Laravel?

The Laravel service container is a tool used to manage class dependencies and perform dependency injection. The service container specifies how dependencies should be resolved. 

 

20. What is dependency injection in Laravel?

Dependency injection is a method used to separate hard-coded class dependencies. In Laravel, dependency injection is the process of injecting class dependencies into a class. This process ensures that the code is clean and runs faster.

 

21. What are the system requirements for installing Laravel?

1. PHP >= 5.4, PHP < 7
2. Mcrypt PHP extension
3. OpenSSL PHP extension
4. PHP Mbstring extension
5. Tokenizer PHP extension

Starting from PHP 5.5, some operating system distributions require manual installation of the PHP JSON extension. For example, when using Ubuntu, it can be installed with the following command 👇:

 

22. What is CSRF in Laravel?

CSRF, which stands for Cross-Site Request Forgery, is a type of malicious activity/attack where a attacker performs actions on behalf of an authenticated user. Laravel protects against CSRF attacks by generating a CSRF token. This CSRF token is automatically generated for each user. 

 

23. How to use CSRF in Laravel?

1️⃣ @csrf: This is a blade template directive used to create a hidden input field in an HTML form.

2️⃣ csrf_field(): This method is used to create a hidden input field in an HTML form.

3️⃣ csrf_token(): This function only returns a random string and does not create a hidden input field.

 

24. What are contracts in Laravel?

In Laravel, contracts are a set of interface definitions that provide a consistent and standardized way to interact with various services and components.

Contracts form a contract between the implementation of a service and the code that depends on it. They define a common set of methods that must be implemented, ensuring consistent behavior across different implementations.

Laravel comes with a predefined set of contracts that cover various functionalities and services. For example:

• Illuminate\Contracts\Auth\Authenticatable: Represents an authenticatable user.
• Illuminate\Contracts\Cache\Repository: Defines methods related to caching and cache management.
• Illuminate\Contracts\Mail\Mailer: Provides methods for sending emails.
• Illuminate\Contracts\Routing\ResponseFactory: Represents a factory for creating HTTP responses.

 

25. How to create custom contracts in Laravel?

Custom contracts can also be created to define custom interfaces for interacting with specific aspects of the application.

 

26. How to enable query logging in Laravel?

Laravel can optionally log all executed queries in memory. However, in cases like adding many rows, this can cause the application to use excessive memory.

To enable query logging, the activeQueryLog method can be used 👇:

 

27. What Blade template engine does Laravel use?

Laravel comes with the Blade templating engine. Blade view files related to Blade are located in the resources/views directory with the

 

28. What is dd() used for in Laravel?

dd() in Laravel stands for "Dump and Die" and is a helper function used to dump the contents of a variable to the browser and halt further execution of the script. 

 

29. How to clear cache in Laravel?

In Laravel, the primary cache stores everything manually cached in the application. There are 2 main ways to clear the cache in Laravel:

1️⃣ Use the Artisan command to clear Laravel cache.

2️⃣ Use the command line to clear Laravel cache.

• Clearing Route Cache: php artisan route:cache
• Clearing Application Cache: php artisan cache:clear
• Clearing Configuration Cache: php artisan config:clear
• Clearing View Cache: php artisan view:clear

 

30. What is Laravel Nova?

Laravel Nova is an administration panel for Laravel web applications. It includes a range of tools and interfaces designed to quickly create customizable admin panels according to individual requirements. It offers data filtering, data searching, custom metrics, visualizations, and third-party tool services.