How to Add if Items do not Exist to a Collection in Laravel?

Nov 16, 2022



How to Add if Items do not Exist to a Collection in Laravel?

Hello Friends,

Now, let's see an example of how to add items that do not exist to a collection in laravel. Here you will learn to add if elements do not exist in the laravel collection. I would like to show you the laravel collection add if items do not exist example. This article goes into detail on how to add values that do not exist to a collection in laravel. You just need to do some steps to do laravel add if items do not exist in a collection.

You can use this example with the versions of laravel 6, laravel 7, laravel 8, and laravel 9.

You have just to follow the below step and you will get the layout as below:

Step 1: Install Laravel

This is optional; however, if you have not created the laravel app, then you may go ahead and execute the below command:

composer create-project laravel/laravel example-app

Step 2: Create Format Route



use Illuminate\Support\Facades\Route;

use App\Http\Controllers\AddIfNotExistsController;



| Web Routes



| Here is where you can register web routes for your application. These

| routes are loaded by the RouteServiceProvider within a group which

| contains the "web" middleware group. Now create something great!



Route::get('/index',[AddIfNotExistsController::class, 'index']);

Step 3: create AddIfNotExistsController

we will create AddIfNotExistsController. so you can see the below code with output:

php artisan make:controller AddIfNotExistsController



namespace App\Http\Controllers;

use Illuminate\Http\Request;

class AddIfNotExistsController extends Controller



* The attributes that are mass assignable.


* @var array


public function index()


$collection = new Collection(['a' => 'Doe', 'b' => "John" , 'c' => "Gadas" , 'd' => "Maxy"]);

$selector = 'Robin';


$collection->prepend($selector, 'e');


} else{

dd($selector.' Already extends.');




Step 4: Start Development Server

Start the development server. Use the PHP artisan serve command and start your server:

php artisan serve

Now you are ready to run our example so run the below command to quick run.



#items: array:5 [▼

"e" => "Robin"

"a" => "Doe"

"b" => "John"

"c" => "Gadas"

"d" => "Maxy"


I hope it can help you...