title: Datatables are not showing data retrieved by Json
body: <p>I wrote this code in a <code>PHP</code> file named <code>anggotabckend.php?action=save</code></p>
  
  <pre><code>$array  = array('satu'=&gt;'1','dua'=&gt;'2','tiga'=&gt;'3');
      $jsoned = json_encode($array);
      echo $jsoned;
  </code></pre>
  
  <p>Then I wrote this code in <code>Datatables</code></p>
  
  <pre><code>$('table#loadeddata').DataTable({
      "ajax": "anggotabckend.php?action=save",
      "columns": [
          {data: 'satu' },
          {data: 'dua' }]
  });
  </code></pre>
  
  <p>the link written in <code>"ajax"</code> is correct, the column is correct, but when I tried to retrieve data, the <code>Datatables</code> ended up with endless loading or sometimes showed no data available. What have I done wrong with this thing?</p>