pilih kelas

<td><SELECT name="id_kelas" class="form-control">
                    <option value="">[ PILIH KELAS ]</option>
                    <?php while ($murid = mysqli_fetch_object($datakelas)) { ?>
                    <option value="<?= $murid->id_kelas ?>" <?= @$result->id_kelas == $murid->id_kelas ? 'selected' : '' ?> >
                        <?= $murid->nama_kelas ?>
                    </option>
                    <?php } ?>
                </SELECT>
            </td>