Slim, PDO, Twig : cara menampilkan 1 data saja pada tombol browse

Pengennya sih pas depencet tombol "Browse" bakal buka data tersebut pada form yang ada di modal.

index.php : route ke data karyawan

$app->get('/data-karyawan', function (Request $request, Response $response, $args) {

  $datas = $this->db->query("SELECT * FROM data_karyawan")->fetchAll(PDO::FETCH_ASSOC);

  return $this->view->render($response, 'datakaryawan.html',[
    "base_url" => $base_url,
    "datakaryawan" => $datas

  ]);
})->setName('datakaryawan');

datakaryawan.html : tabel

<table class="table table-hover">

    <thead>
      <tr class="navbar-inverse" style="color: #fff;">
      <th>NIK</th>
      <th>Nama</th>
      <th>Alamat</th>
      <th>Kontak</th>
      <th>Action</th>
      </tr>
    </thead>

    <tbody>
      {% for row in datakaryawan %}
      <tr class="info">
        <td>{{ row.NIK }}</td>
        <td>{{ row.nama }}</td>
        <td>{{ row.alamat }}</td>
        <td>{{ row.notelp }}</td>
        <td>
           <button type="button" class="btn btn-info" data-toggle="modal" data-target="#modalview">Browse</button>
        </td>
      </tr>
      {% else %}
      nouser
      {% endfor %}
    </tbody>

    </table>

datakaryawan.html : modal

<div class="modal fade" id="modalview" role="dialog">
    <div class="modal-dialog">

      <!-- Modal content-->
      <div class="modal-content">
        <div class="modal-header">
          <button type="button" class="close" data-dismiss="modal">×</button>
          <h4 class="modal-title">Data karyawan</h4>
        </div>
        <div class="modal-body">
          <div class="form-group">
            <label for="txtnik">NIK (Nomor Induk Karyawan)</label>
            <input type="text" id="txtnik" class="form-control input-sm" readonly/>
          </div>
          <div class="form-group">
            <label for="txtnama">Nama Lengkap</label>
            <input type="text" id="txtnama" class="form-control input-sm" readonly/>
          </div>
          <div class="form-group">
            <label for="txtalamat">Alamat</label>
            <input type="text" id="txtalamat" class="form-control input-sm" readonly/>
          </div>
          <div class="form-group">
            <label for="txtkontak">Kontak</label>
            <input type="text" id="txtkontak" class="form-control input-sm" readonly/>
          </div>
        </div>
        <div class="modal-footer">
          <div class="col-md-1">
            <button type="button" class="btn btn-primary">Edit</button>
          </div>
          <div class="col-md-11">
            <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
          </div>
        </div>
      </div>

    </div>
  </div>

gambarnya <a href=' https://flic.kr/p/Snxz1M '&gt; https://flic.kr/p/Snxz1M </a>

tolong ya masih belajar, makasih xD