$first_and_last = "SELECT * FROM tblbewerb WHERE (bew_tln_id = '$tln_id') ORDER BY bew_abgeschickt";
      $ergebnis_first_and_last = mysqli_query($con,$first_and_last);

      while ($row_first_and_last = mysqli_fetch_object($ergebnis_first_and_last)) {

          $tmp_arr_row_first_and_last[] = $row_first_and_last->bew_abgeschickt;
      }
      $first = reset($tmp_arr_row_first_and_last);
      $last = end($tmp_arr_row_first_and_last);