<?php
$html = '<html><head></head><body>'.
'<table id="right"><tbody>'.
'<tr class="olddata"><td class="numeric">ABC</td><td class="numeric">DEF</td></tr>'.
'<tr class="olddata"><td class="numeric">GHI</td><td class="numeric">JKL</td></tr>'.
'</tbody></table></body></html>';
$doc = new DOMDocument();
$doc->loadHTML($html);
$XPath = new DOMXPath($doc);
$tr = $XPath->query('//*[@id="right"]//*[@class="olddata"][1]//td[@class="numeric"][1]');
$trHTML = $tr->item(0)->nodeValue;
echo $trHTML;
?>