【Laravel入門】Request $requestとは？inputデータをの受信と取得

[
    'name' => 'kamiblog',
    'age' => 35,
]

public function hogeFunc(Request $request)
{
    $name = $request->input('name');
    $age = $request->input('age');
}

$name = $request->name; kamiblog
$age = $request->age; 35

public $input_data;

class laravelAppController extends Controller{
  public function __construct()
  {

  }

  public function index(Request $request)
  {
     $this->input_data = $request->input('name');

      if (empty($this->input_data))
      {
        echo 'null';
      } else {
        echo $this->input_data;
      }

       return view()->with([
         'input_value'=>$this->input_data
       ]);
  }
}

<form>
  <input id="" class="" type="" name="" value="">
  <button type="submit">
</form>