Remove duplicate values from collection in laravel

Laravel remove duplicate values from collection. how to make array_unique in laravel collection with example. In this example we show delete duplicate values from laravel collection.

Remove duplicate values from multi-dimensional array. Also, see how to make a multi-dimension array unique by multiple columns.

Laravel example of make unique collection

We use unique() method for remove duplicate values from collection see in example

public function index() {
    $numbers = collect([5,5,6,7,2,5,6,4,3]);
      
    $uniqueNumbers = $numbers->unique();
      
    dd($uniqueNumbers);
    // or print in index order
    dd($uniqueNumbers->values());
}

Laravel make multi dimensional collection unique

When you want to make multimensional array or collection unique pass key name in unique method

public function index() {
  
    $myCollection = collect([
            ['id'=>1, 'name'=>'Anmol', 'country'=>'India'],
            ['id'=>2, 'name'=>'Krishan', 'country'=>'India'],
            ['id'=>3, 'name'=>'Alok', 'country'=>'US'],
            ['id'=>3, 'name'=>'Aniket', 'country'=>'US'],
            ['id'=>4, 'name'=>'Advanced', 'country'=>'UK']
        ]);

	$uniqueCollection = $myCollection->unique('country');
      
    dd($uniqueCollection);
    // or print in index order
    dd($uniqueCollection->values());
}

Laravel make multi dimensional collection unique by multiple columns

public function index() {
  
    $myCollection = collect([
            ['id'=>1, 'name'=>'Anmol', 'country'=>'India'],
            ['id'=>2, 'name'=>'Krishan', 'country'=>'India'],
            ['id'=>3, 'name'=>'Alok', 'country'=>'US'],
            ['id'=>3, 'name'=>'Aniket', 'country'=>'US'],
            ['id'=>4, 'name'=>'Advanced', 'country'=>'UK']
        ]);

	$uniqueCollection = $myCollection->unique(function ($item) {
                            return $item['country'].$item['name'];
                        });
      
    dd($uniqueCollection);
    // or print in index order
    dd($uniqueCollection->values());
}