Laravel 8 Collection count() and countBy() Methods Example

Teams applying “Laravel 8 Collection count() and countBy() Methods Example” in a production project can use the full explanation to record implementation, review and debugging time, then compare that effort with tests and shipped functionality instead of treating activity as performance by itself.

Before copying the example into a live application, confirm version-specific behaviour with the official Laravel website and test it against the project’s actual database and runtime.

Hi Friends,

I am going to explain you example of laravel 8 collection count() and countby() methods. Inside this article we will see the use of count() and countBy() methods in laravel 8 collections. Article contains a very classified information about the basic concept of Laravel 8 Collection count() and countBy().

We will see the concept of count number of items in laravel collection. We will count all items in a collection also will cover count element wise.

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.

Let's see bellow example:

Step : 1 - Installation of Laravel Application

Use this command then download laravel project setup :

composer create-project --prefer-dist laravel/laravel blog

Step : 2 - Create Controller

php artisan make:controller CollectController

Example #1 Use count() Method

/app/Http/Controllers

<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
class SiteController extends Controller
{
    public function index()
    {
        $data = collect([1, 2, 3, 4, 2, 3, 1, 5, 4, 7, 6, 8, 9, 3, 10]);
        $total = $data->count();
        echo "Total Collection Items: " . $total;
    }
}

Output:

Total Collection Items : 15

Example #2 Use countBy() Method

<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
class SiteController extends Controller
{
    public function index()
    {
        $data = collect([1, 2, 3, 4, 2, 3, 1, 5, 4, 7, 6, 8, 9, 3, 10, 4, 5]);
        $elements = $data->countBy();
        dd($elements);
    }
}

Output:

Illuminate\Support\Collection{
    items: array:10[
        1=>2
        2=>2
        3=>3
        4=>3
        5=>2
        7=>1
        6=>1
        8=>1
        9=>1
        10=>1
    ]
}