<?php
$html = <<< HTML
<table id=myid>
<tr>
<td>value1</td>
<td>value2</td>
</tr>
<tr>
<td>value1</td>
<td>value2</td>
</tr>
</table>
HTML;
echo LIBXML_VERSION;
$dom = new DOMDocument();
$dom->validateOnParse = true;
$dom->loadHTML($html);
$table = $dom->getElementById('myid');
$table=$dom->getElementById('myid');
foreach($table->getElementsByTagName('tr') as $key =>$tr){
echo $tr->getElementsByTagName('td')->item(0)->nodeValue;
}