Laravel | Get the dropdown selected value after submit

I would like to get the dropdown selected value after submitting the form.

If I run a dd($_REQUEST); I can find the submitted value into an array :

"ordersdetail-productnameID" => array:1 [▼ 0 => "1" ]

I tried may variantes to get to my value from the array but without success :

$productnameID = array( 
    'ordersdetail-productnameID' => $input['productnameID']); or
$productnameID = $request->input('orders_detail.0.productnameID ');

Would appreciate some expertise.

Thanks, Cheers, Marc

via Chebli Mohamed