foreach is filtering some data laravel code example

Example: filter laravel

public function index()
{
    $myStudents = [
        ['id'=>1, 'name'=>'Hardik', 'mark' => 80],
        ['id'=>2, 'name'=>'Paresh', 'mark' => 20],
        ['id'=>3, 'name'=>'Akash', 'mark' => 34],
        ['id'=>4, 'name'=>'Sagar', 'mark' => 45],
    ];
  
    $myStudents = collect($myStudents);
   
    $passedstudents = $myStudents->filter(function ($value, $key) {
        return data_get($value, 'mark') > 34;
    });
   
    $passedstudents = $passedstudents->all();
   
    dd($passedstudents);
}