Untuk form edit

edit.php

<form action="update.php" role="form" method="POST" enctype="multipart/form-data">
              <input type="hidden" class="form-control" name="id_pengumuman" value="<?php echo $id_pengumuman;?>">
              <div class="box-body">
                <div class="form-group">
                  <label>Judul</label>
                  <input type="text" class="form-control" placeholder="Judul" name="judul" value="<?php echo $data['judul'];?>" required>
                </div>
                <div class="form-group">
                  <label>Keterangan</label>
                  <textarea type="text" class="form-control" placeholder="Keterangan" name="keterangan" required><?php echo $data['keterangan'];?></textarea>
                </div>
                <div class="form-group">
                  <label>File Lampiran</label>
                  <input type="hidden" name="file_lampiran_lama" value="<?php echo $data['file_lampiran'];?>">
                  <input type="file" class="form-control" name="file_lampiran_baru">
                </div>
              </div>
              <!-- /.box-body -->

              <div class="box-footer">
                <button type="submit" class="btn btn-primary"><i class="fa fa-save"></i> Perbaharui</button>
              </div>
            </form>