tak sem to prepsal pomoci array a case

if (in_array($_GET['id'], array( '1', '2', '3', '4','5','6', '7'))) {
    $id = '1';
  } else {
    $id = $_GET['id'];
  }
  
  switch ($id)
  {
    case '2':
      include "stranka1.php";
      break;
    case '3':
      include "stranka2.php";
      break;
    case '4':
      include "stranka3.php";
      break;
    case '5':
      include "stranka4.php";
      break;
    case '6':
      include "stranka5.php";
      break;
    case '7':
      include "stranka6.php";
      break;
    case '1':
    default:
      include "index.php";
      break;      
    }