Top Laravel Interview Questions and Answers

It is a helper function which is used to dump a variable's contents to the browser and stop the further script execution. It stands for Dump and Die.

We can create a helper file using Composer. Steps are given below:-

• Please create a app/helpers.php file that is in app folder.
• Add
  "files": [
      "app/helpers.php"
  ]
  in "autoload" variable.
• Now update your composer.json with composer dump-autoload or composer update

Here are some of the reasons why Laravel is considered to be better than CodeIgniter:

NOTE: If you are looking CodeIgniter Questions for interview preparations, then you can visit here.

Laravel installation steps:-

• Download composer from https://getcomposer.org/download (if you don’t have a composer on your system)
• Open cmd
• Goto your htdocs folder.
• C:\xampp\htdocs>composer create-project laravel/laravel projectname
  OR
  If you install some particular version, then you can use
  composer create-project laravel/laravel project name "5.6"

If you did not mention any particular version, then it will install with the latest version.

A laravel service container is one of the most powerful tools that have been used to manage dependencies over the class and perform dependency injections.

Advantages of Service Container

• Freedom to manage class dependencies on object creation.
• Service contain as Registry.
• Ability to bind interfaces to concrete classes.

1. Retrieving Data from session
session()->get('key');

2. Retrieving All session data
session()->all();

3. Remove data from session
session()->forget('key'); or session()->flush();

4. Storing Data in session
session()->put('key', 'value');

In case you are using save()

$blog = new Blog;
$blog->title = ‘Best Interview Questions’;
$blog->save()
// Now you can use (after save() function we can use like this)
$blog->id // It will display last inserted id

In case you are using insertGetId()

$insertGetId = DB::table(‘blogs’)->insertGetId([‘title’ => ‘Best Interview Questions’]);

1. delete()

In case when we used to delete in Laravel then it removed records from the database table.

Example:

$delete = Post::where(‘id’, ‘=’, 1)->delete();

2. softDeletes()

To delete records permanently is not a good thing that’s why laravel used features are called SoftDelete. In this case, records did not remove from the table only delele_at value updated with current date and time.
Firstly we have to add a given code in our required model file.

use SoftDeletes;
protected $dates = ['deleted_at'];

After this, we can use both cases.

$softDelete = Post::where(‘id’, ‘=’, 1)->delete();

OR

$softDelete = Post::where(‘id’, ‘=’, 1)->softDeletes();

1. How to set Cookie

To set cookie value, we have to use Cookie::put('key', 'value');

2. How to get Cookie

To get cookie Value we have to use Cookie::get('key');

3. How to delete or remove Cookie

To remove cookie Value we have to use Cookie::forget('key')

4. How to check Cookie

To Check cookie is exists or not, we have to use Cache::has('key')

Laravel Auth is the process of identifying the user credentials with the database. Laravel managed it's with the help of sessions which take input parameters like username and password, for user identification. If the settings match then the user is said to be authenticated.

Auth is in-built functionality provided by Laravel; we have to configure.

We can add this functionality with php artisan make: auth

Auth is used to identifying the user credentials with the database.