PHP: How to join two HTML tables into one?

Question

I have two HTML tables. Each has three rows and one column only. I'd like to join them programmatically such that I get one table with two columns and three rows.

Is there some function or hack to achieve this? How can I achieve this?

For example First Table:

<table id="table_one">
   <tbody>
    <tr>
      <td>
         <label>data one</label>
      </td>
    </tr>
    <tr>
      <td>
         <label>data two</label>
      </td>
    </tr>
    <tr>
      <td>
         <label>data three</label>
      </td>
    </tr>
  </tbody>
</table>

Second Table:

<table id="table_two">
  <tbody>
    <tr>
      <td>
         <label>data one</label>
      </td>
    </tr>
    <tr>
      <td>
         <label>data two</label>
      </td>
    </tr>
    <tr>
      <td>
         <label>data three</label>
      </td>
    </tr>
  </tbody>
</table>

This is what I want from the above two tables:

<table id="table_three">
  <tbody>
    <tr>
      <td>
         <label>data one</label>
      </td>
      <td>
         <label>data one</label>
      </td>
    </tr>
    <tr>
      <td>
         <label>data two</label>
      </td>
      <td>
         <label>data two</label>
      </td>
    </tr>
    <tr>
      <td>
         <label>data three</label>
      </td>
      <td>
         <label>data three</label>
      </td>
    </tr>
  </tbody>
</table>

Answer 1

Well, this is a way to proceed (check in-code comments):

$table1 = <<<'_DATA_'
<table id="table_one">
   <tbody>
    <tr>
      <td>
         <label>data one</label>
      </td>
    </tr>
    <tr>
      <td>
         <label>data two</label>
      </td>
    </tr>
    <tr>
      <td>
         <label>data three</label>
      </td>
    </tr>
  </tbody>
</table>
_DATA_;


$table2 = <<<'_DATA_'
<table id="table_two">
  <tbody>
    <tr>
      <td>
         <label>data one</label>
      </td>
    </tr>
    <tr>
      <td>
         <label>data two</label>
      </td>
    </tr>
    <tr>
      <td>
         <label>data three</label>
      </td>
    </tr>
  </tbody>
</table>
_DATA_;

// Load teh 1st table
// Create a DOM object
$html1 = new simple_html_dom();
// Load HTML from a string
$html1->load($table1);


// Load teh 2nd table
// Create a DOM object
$html2 = new simple_html_dom();
// Load HTML from a string
$html2->load($table2);

// Find all rows from both tables
$rows1 = $html1->find('tr');
$rows2 = $html2->find('tr');

// Build teh 3rd table
$table3 =   '<table id="table_three">
                <tbody>';

// Insert rows cells from both initial tables
for ($i=0; $i < count($rows1); $i++) { 
    $table3 .=  '<tr>';

        // get row's innerhtml
        $table3 .=  $rows1[$i]->innertext;
        $table3 .=  $rows2[$i]->innertext;

    $table3 .=  '</tr>';
};

// finish the table
$table3 .=      '</tbody>
            </table>';

// Clear DOM objects
$html1->clear();
unset($html1);
$html2->clear();
unset($html2);

It creates this: