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The Collection class in Laravel 10 provides a variety of useful methods for interacting with data collections. The Collection class has two crucial methods: contains() and containsStrict(). These methods allow you to check whether a collection includes a certain value, making conditional checks and data validations simple.

We will look at the contains() and containsStrict() methods in Laravel 10 Collections in this article. We will walk you through the process of using these methods to check for the presence of a value in your collections, step by step.

These methods provide seamless functionality to meet your requirements, whether you need to search for a value based on a specific criteria or do strict type checks.

The Illuminate\Support\Collection class provides a fluent, convenient wrapper for working with arrays of data. For example, check out the following code. We’ll use the collect helper to create a new collection instance from the array.

As mentioned above, the collect helper returns a new Illuminate\Support\Collection instance for the given array.

So, creating a collection is as simple as:

$collection = collect([1, 2, 3]);

Let’s get started.

Laravel Installation

Open terminal and run this command to create a laravel project.

composer create-project laravel/laravel myblog

It will create a project folder with name myblog inside your local system.

To start the development server of laravel –

php artisan serve

URL: http://127.0.0.1:8000

Assuming laravel already installed inside your system.

Laravel Collection: Use contains() Method

We will see how to use contains() into collection.

Suppose we have SiteController.php a controller file inside /app/Http/Controllers folder.

Code Example #1

Laravel Collection contains() –

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class SiteController extends Controller
{
    public function index()
    {
        $collection = collect([
            "India",
            "Australia",
            "South Africa",
            "Nepal"
        ]);

        $collection->contains('Nepal');  /* true */
        $collection->contains('China');   /* false */
    }
}

Concept

$collection->contains('Nepal');  /* true */

Code Example #2

Laravel Collection contains() with Key Value Check

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class SiteController extends Controller
{
    public function index()
    {
        $collection = collect([
            ["id" => 1, "name" => "Sanjay", "email" => "sanjay@gmail.com"],
            ["id" => 2, "name" => "Vijay", "email" => "vijay@gmail.com"],
            ["id" => 3, "name" => "Ashish", "email" => "ashish@gmail.com"]
        ]);

        $collection->contains('name', 'Vijay');  /* true */
        $collection->contains('name', 'Dhananjay');   /* false */
    }
}

Concept

$collection->contains('name', 'Vijay');  /* true */

Code Example #3

Laravel Eloquent with Collection contains()

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Product;

class SiteController extends Controller
{
    public function index()
    {
        Product::create(['name' => 'Science Books', 'price' => 2200]);
        Product::create(['name' => 'Tshirts', 'price' => 1250]);
        Product::create(['name' => 'Jeans', 'price' => 1500]);

        Product::get()->contains('name', 'Jeans'); /* true */

        Product::get()->contains('name', 'Electronic Device');  /* false */

        Product::get()->contains('price', 1500);  /* true */
    }
}

Concept

Product::get()->contains('name', 'Jeans'); /* true */

Code Example #4

Laravel Collection contains() with function

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Product;

class SiteController extends Controller
{
    public function index()
    {
        Product::create(['name' => 'Science Books', 'price' => 2200]);
        Product::create(['name' => 'Tshirts', 'price' => 1250]);
        Product::create(['name' => 'Jeans', 'price' => 1500]);

        Product::get()->contains(function ($key, $value) {
            return $value->price > 1000;
        }); // true
    }
}

Concept

Product::get()->contains(function ($key, $value) {
     return $value->price > 1000;
}); // true

Laravel Collection: Use containsStrict() Method

We will see how to use containsStrict() into collection. It checks the value and the type as well.

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class SiteController extends Controller
{
    public function index()
    {
        $collection = collect([100, 150, 200, 250, 300]);

        $collection->containsStrict('150');  /* false */

        $collection->containsStrict(150);  /* true */
    }
}

We hope this article helped you to Laravel 10 Collection contains() and containsStrict() Methods Tutorial in a very detailed way.

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