domxpath- how to get content for parent tag only instead of child tags - dom

Question

I, am using domxpath query for fetching content for parent tag only that is (td[class='s']) instead of including div content which is nested inside that td as given below in my code.
<?php
$second_trim='<td class="s" style="line-height:18px;">THIS TEXT IS REQUIRED and <div id="a" style="display:none;background-color:black;border:1px solid #ddd;padding:5px;color:black;">THIS TEXT IS NOT REQUIRED </div></td>';
$dom = new DOMDocument();
$doc->validateOnParse = true;
#$dom->loadHTML($second_trim);
libxml_clear_errors();
$xpath = new DOMXpath($dom);
$b = $xpath->query('//td[#class="s"]');
echo "<p style='font-size:14px;color:red;'><b style='font-size:18px;color:gray;'>cONTENT :- </b>".$b->item(0)->nodeValue."</p>";
?>
so how to remove content of that div tag and fetching only td's content any ideas !!

Answer 1

EDIT
If you are only interested in the direct text content modify your xpath query:
$b = $xpath->query('//td[#class="s"]/text()');
echo '<p style="font-size:14px;color:red;">'
.'<b style="font-size:18px;color:gray;">cONTENT :- </b>'
.$b->item(0)->nodeValue
.'</p>';
Right now the result is very specific to the example:
If more than one direct text node exists, its not gone be displayed. To do that foreach through the DOMNodeList $b and echo every selected node value.