class SearchController extends Controller
{
    public function autocomplete(Request $request)
    {
        $term = $request->term;

        $queries = DB::table('products') //Your table name
        ->where('product_name', 'like', '%'.$term.'%') //Your selected row
        ->take(6)->get();

        die(var_dump($queries));


        foreach ($queries as $query)
        {
            $results[] = ['value' => $query->product_name, 'id' => $query->id]; //you can take custom values as you want
        }
        return response()->json($results);
    }
}