Hello Friends,

Now, let's see an example of laravel add if items do not exist in a collection. you will learn laravel collection add if items do not exist example. This article will give you a simple example of adding if elements do not exist in the laravel collection. I would like to show you the laravel collection ad if items do not exist. Let's see below an example of how to add values that do not exist to a collection in laravel.

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:

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

<?php

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']);

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

php artisan make:controller AddIfNotExistsController

<?php

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';

        if(!$collection->contains($selector)){
         
            $collection->prepend($selector, 'e');
         
            dd($collection);

        } else{
            
            dd($selector.' Already extends.');
        
        }
    }
}

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.

http://localhost:8000/index

#items: array:5 [▼
    "e" => "Robin"
    "a" => "Doe"
    "b" => "John"
    "c" => "Gadas"
    "d" => "Maxy"
]

I hope it can help you...