Laravel Interview questions

What are pros and cons of using Laravel Framework?

Laravel

Pros of Laravel

1. It uses Blade template engine that helps in speed up compilation tasks and writing cleaner code.
2. Bundled modularity forces code reusability.
3. Easy to understand Eloquent ORM.
4. Outstanding Command Line Interface Artisan.
5. Clean, clear easily understandable documentation.

Cons of Laravel

1. Quite slow because of loading multiple vendors.
2. Amature developers face some difficulties in staring, but once they are familiar it will be fun to code in Laravel.
3. Community support is not as wide as a comparison to other frameworks.
4. Upgrading framework is a headache.

What is Laravel service container?

Laravel

Service Container in Laravel is a Dependency Injection Container and a Registry for the application. It is one of the most powerful tool for managing class dependencies and performing dependency injection.

How To Use Delete Query In Laravel ?

Laravel

DB::table('table_name')->delete($id);

is the simplest way to delete a record in Laravel.

How To Use Update Query In Laravel ?

Laravel

Updating a record in Laravel using Eloquent.

$user=User::where(['id'=>1])->first();
$user->name='abc';
$user->age='22';
$user->save();

What is Laravel Dusk?

Laravel

Laravel Dusk is browser automation and testing tool introduced in Laravel 5.4. It uses ChromeDriver to perform browser automation testing.

What is Laravel Echo?

Laravel

Laravel Echo is a tool that makes it easy for you to bring the power of WebSockets to your Laravel applications. It simplifies some of the more common—and more complex—aspects of building complex WebSockets interactions.

Echo comes in two parts: a series of improvements to Laravel's Event broadcasting system, and a new JavaScript package.

Source: https://mattstauffer.com/blog/introducing-laravel-echo/

What is Laravel Homestead ?

Laravel

Laravel Homestead is an official, pre-packaged Vagrant "box" that provides you a wonderful development environment without requiring you to install PHP, HHVM, a web server, and any other server software on your local machine.

What is Tagging?

Laravel

Tagging is a package in Laravel that allow you to tag your content like pages/ post to a keyword.

What is dependency injection in Laravel ?

Laravel

Dependency injection or (D.I) is a technique in software Engineering whereby one object (or static method) supplies the dependencies of another object. A dependency is an object that can be used (a service). Injection is the passing of dependency to a dependent object (a client) that would use it.

Basically, You can found 3 types of dependency injection:

• Constructor injection
• Setter injection
• Interface injection

What are named routes in Laravel?

Laravel

Named routing is another amazing feature of the Laravel framework. Named routes allow referring to routes when generating redirects or URLs more comfortably. You can specify named routes by chaining the name method onto the route definition:

Example:

Route::get('user/profile', function () {
    //
})->name('profile');

You can specify route names for controller actions:

Route::get('user/profile', 'UserController@showProfile')->name('profile');

Once you have assigned a name to your routes, you may use the route's name when generating URLs or redirects via the global route function:

// Generating URLs...
$url = route('profile');

// Generating Redirects...
return redirect()->route('profile');

Source: http://www.laravelinterviewquestions.com/2017/07/named-routes-laravel.html

What are Laravel eloquent?

Laravel

Eloquent is an ORM in Laravel that implements active record pattern and is used to interact with relational databases.

What is Lumen?

Laravel

Lumen is micro-framework by Laravel. It is developed by the creator of Laravel Taylor Otwell for creating smart and blazing fast API’s. Lumen is built on top components of Laravel. As Lumen is a micro-framework not a complete web framework like Laravel and used for creating API’s only, so most of the components as HTTP sessions, cookies, and templating are excluded from Lumen and only features like routing, logging, caching, queues, validation, error handling, database abstraction, controllers, middleware, dependency injection, Blade templating, command scheduler, the service container, and the Eloquent ORM are kept.

What is a Facade?

Laravel

In Programming, Facade is a software design pattern which is often used in object-oriented programming. Laravel facade is a class which provides a static-like interface to services inside the container.

How To Use Delete Statement In Laravel?

Laravel

Use delete statement in Laravel:

In Query Builder Way:

\DB::table('users')->delete($id); // delete with id
\DB::table('users')->where('name', $name)->delete(); \\ delete with where condition

In Eloquent Way:

 User::find($id)->delete() // delete with id
 User::where(['name'=>$name])->delete();  \\ delete with where condition

Difference between Contracts and Facades?

Laravel

Contracts are an interface, while Facades are not an interface. it is a class. 

Contracts are a set of interfaces that define the core services provided by the framework, while Facades provide a static interface to classes that are available in the application's service container.

What is an Observer in Laravel?

Laravel

An observer attaches to an Eloquent Model for Laravel.

This observer can listen to many different events that happen on the model such as: creating, created, saving, saved, deleting, deleted and many more... All of which you can find here:

https://laravel.com/docs/5.8/eloquent#events

The observer listens for these events and fires whenever said action is triggered, letting you preform pre or post procedure statements whenever an action is taken.

 For instance, if you have a user registration page, and every time you create a user, you want to ensure that the password is hashed... You can hook into the User "creating" event.

 public function creating(User $user) {
  $user->password = bcrypt($user->password);

}

 This will ensure that every time a user is created with a password, that password is automatically hashed.

 In order to register the Observer, you should place it in either the boot() section of your AppServiceProvider or your own custom provider. Note: if you use a custom provider, be sure to register it in config/app.php

You will need the model and the observer. IE:

boot() {
   User::observe(new UserObserver);
}

// That's it...

Now any events that the User model fires will be performed by the User Observer if you have identified any in the observer.

How to get current Url in Laravel ?

Laravel

In Laravel 5.5 or above you can use url()->current(); to get current URL without query string and  url()->full(); with the query string.

How To Use Select Query In Laravel?

Laravel

DB::select('name')->table('users')->get();

This will create a collection that only contains the 'name' property of ever user...

DB::select('name','username')->table('users')->get();

This will select name and username from users

Which template engine Laravel use ?

Laravel

Laravel uses Blade template Engine.

How to use custom table in Laravel Model ?

Laravel

protected $table = 'custom_table_name';

Attach this to your CustomModel.php

What are Closures in laravel ?

Laravel

A Closure is an anonymous function that often used as callback methods and can be used as a parameter in a function.

Example of Laravel Closure

User::with('profile', function ($builder) {
	// Get me all collapsed comments
	return $builder->whereCollapsed(true);
	
});

How to get Logged in user info in Laravel ?

Laravel

Does laravel support php 7?

Laravel

Yes, Laravel supports PHP 7.

What is Laravel Elixir ?

Laravel

Laravel Elixir provides a clean, fluent API for defining basic Gulp tasks for your Laravel application. Elixir supports several common CSS and JavaScript pre-processors, and even testing tools. Using method chaining, Elixir allows you to fluently define your asset pipeline.

Laravel Elixir Example

elixir(function(mix) {
    mix.sass('app.scss')
       .coffee('app.coffee');
});

What is the latest version of laravel?

Laravel

How can you display HTML with Blade in laravel

Laravel

How to install laravel via composer ?Syntax

Laravel

What are Cookies ? How to get , set , distroy cookies in Laravel ?

Laravel

How can you Exclude URIs From CSRF Protection in Laravel ?

Laravel

What getFacadeAccessor method does

Laravel