Advanced Laravel Interview Questions with Answers 1 To 7 Year Experienced ,2024

1). Define Composer or What is Composer & why we use ?

A composer is a tool for dependency management in the PHP programming language. It allows you to declare the libraries your project depends on and it will manage (install/update) them for you.

It helps us install/update various requirements/components for our app such as Laravel framework, Doctrine, lodash, etc.

OR

The composer is the package manager for the PHP framework. It helps in adding new packages from the massive community into your PHP application.

For example, one of the most used packages for authentication will be Passport in your laravel Project, for including that into your project, you can run the below command on your terminal:

composer requires laravel/passport

2). which templating engine is used in laravel?

The Blade templating engine is used in Laravel Framework. The Blade Template gives the ability to use its mustache-like syntax with the plain PHP and gets compiled into plain PHP and cached until any other change happens in the blade file. The blade file has .blade.php extension.

3). what are available databases supported by the laravel framework?

The supported databases in laravel are:

  • PostgreSQL
  • SQL Server
  • SQLite
  • MySQL

4). What is an artisan in the Laravel framework?

Artisan is the name of the command-line interface included with Laravel. It provides a number of helpful commands for your use while developing your application. It is driven by the powerful Symfony Console component.

Artisan is the command-line tool for Laravel to help the developer build the application. You can enter the below command to get all the available commands:

PHP artisan list: Artisan command can help in creating the files using the make command. Some of the useful artisan commands are listed below:

PHP artisan make:controller - Make Controller file
PHP artisan make:model - Make a Model file
PHP artisan make:migration - Make Migration file
PHP artisan make:seeder - Make Seeder file
PHP artisan make:factory - Make Factory file
PHP artisan make:policy - Make Policy file
PHP artisan make:command - Make a new artisan command

5). what are named routes in laravel

Named routes are an important feature in Laravel. It allows you to guide to the routes when generating URLs or redirects to the specific routes. In short, we can say that the naming route is the way of providing a nickname to the route.

OR

A named route is a route explanation with the name assigned to it. We can then use that name to call the route anywhere else in the application.

Route::get('/hello', 'HomeController@index')->name('index');

This can be accessed in a controller using the following:

return redirect()->route('index');

6). What is Middleware and how to create one in Laravel?

Middleware acts as a bridge between a request and a response. It is a kind of filtering mechanism.

for example, Laravel includes a middleware that verifies whether the user of the application is authenticated or not. If the user is authenticated, it redirects to the Dashboard page otherwise, if not, it redirects to the login page.

We can always create a new middleware using the laravel artisan command.

php artisan make:middleware <middleware-name>

7). What are queues in Laravel Framework?

A queue involves placing things in order. For instance, a queue management system can be used to serve customers on a first-come-first-serve basis.

This is no different from the Laravel queue. It serves the same job by ensuring that programs or services are executed in a certain order.

8). What is a Service Provider in Laravel Framework?

Service providers are the central place of all Laravel application bootstrapping(registering). Your own application, as well as all of Laravel’s core services, are bootstrapped via service providers.

So whenever you want to inject a service into other services, you can add it into a constructor or method, and it’s injected automatically from the service container by the service provider.

Example

class demoClass{
   public function __construct(AwesomeService $awesome_service)
   {
        $awesome_service->doAwesomeThing();
   }
}

9). What is a Service Container in Laravel Framework?

The Laravel service container is a powerful tool for handling class dependencies and performing dependency injection.

class dependencies are “injected” into the class via the constructor or, in some cases, “setter” methods.

Let’s look at a simple example:

<?php
 
namespace App\Http\Controllers;
 
use App\Http\Controllers\Controller;
use App\Repositories\UserRepository;
use App\Models\User;
 
class UserController extends Controller
{
    /**
     * The user repository implementation.
     *
     * @var UserRepository
     */
    protected $users;
 
    /**
     * Create a new controller instance.
     *
     * @param  UserRepository  $users
     * @return void
     */
    public function __construct(UserRepository $users)
    {
        $this->users = $users;
    }
 
    /**
     * Show the profile for the given user.
     *
     * @param  int  $id
     * @return Response
     */
    public function show($id)
    {
        $user = $this->users->find($id);
 
        return view('user.profile', ['user' => $user]);
    }
}

In the above example, the UserController requires to get users from a data source. So, we will inject a service that can retrieve users. In this context, our UserRepository most likely uses Eloquent to retrieve user information from the database.

10). What are Requests in Laravel Framework?

Requests in Laravel Framework are a way to interact with incoming HTTP requests along with sessions, cookies, and even files if submitted with the request using Illuminate\Http\Request class.

When any request is submitted to a laravel route, it goes through to the controller method, and with the help of dependency Injection, the request object is available within the method. We can do all kinds of things with the request like authorizing or validating the request, etc.

Example

use Illuminate\Http\Request;
 
Route::get('/', function (Request $request) {
 //
});

11). What are facades in Laravel?

Laravel’s features interact via “facades”. Facades provide a “static” interface to classes that are available in the application’s service container. Laravel ships with many facades which provide access to almost all of Laravel’s features.

Or

Facades are a way to register your class and its methods in Laravel Container so they are available in your whole application after getting resolved by Contemplation.

The main Feature of using facades is we don’t have to remember long class names and also don’t need to require those classes in any other class for using them. It also gives more testability to the application.

Example 

All of Laravel’s facades are defined in the Illuminate\Support\Facades namespace. So, we can easily access a facade like so:

use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Route;
 
Route::get('/cache', function () {
    return Cache::get('key');
});

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