Laravel Collection Get Duplicates Values Example

In this short tutorial we will cover an laravel example. you can understand a concept of laravel collection get duplicates. Here you will learn laravel collection find duplicates. you will learn laravel collection filter duplicates. So, let's follow few step to create example of laravel collection duplicates example.

I will give you simple example of duplicates colletion in laravel. so you can easily use it with your laravel 5, laravel 6 and laravel 7 application. so let's see bellow example that will helps you lot.

Syntax:

$collecton->duplicates(
    Key As Optional
);

Laravel Collection duplicates() Example

public function index()
{
    $collection = collect([1, 2, 3, 3, 4, 4, 4, 5]);
  
    $collection = $collection->duplicates();
        
    dd($collection);
}

Output:

Illuminate\Support\Collection Object
(
    [items:protected] => Array
        (
            [3] => 3
            [5] => 4
            [6] => 4
        )
)

Laravel Collection duplicates() with Argument Example

public function index()
{
    $collection = collect([
            ["id"=>1, "name"=>"Hardik", "role"=>"Admin"],
            ["id"=>2, "name"=>"Paresh", "role"=>"Admin"],
            ["id"=>3, "name"=>"Rakesh", "role"=>"User"],
        ]);
  
    $collection = $collection->duplicates('role');
        
    dd($collection);
}

Output:

Illuminate\Support\Collection Object
(
    [items:protected] => Array
        (
            [1] => Admin
        )
)

Laravel Collection duplicates Count Example

public function index()
{
    $collection = collect([
            ['id'=>1, 'name'=>'Hardik', 'city' => 'Mumbai', 'country' => 'India'],
            ['id'=>2, 'name'=>'Vimal', 'city' => 'New York', 'country' => 'US'],
            ['id'=>3, 'name'=>'Harshad', 'city' => 'Gujarat', 'country' => 'India'],
            ['id'=>4, 'name'=>'Harsukh', 'city' => 'New York', 'country' => 'US'],
        ]);
  
    $grouped = $collection->groupBy('country')->map(function ($row) {
                    return $row->count();
                });
        
    dd($grouped);
}

Output:

Illuminate\Support\Collection Object
(
    [items:protected] => Array
        (
            [India] => 2
            [US] => 2
        )
)

I hope it can help you...