php regex or html dom parsing - php

Question

I use regex for HTML parsing but I need your help to parse the following table:
<table class="resultstable" width="100%" align="center">
<tr>
<th width="10">#</th>
<th width="10"></th>
<th width="100">External Volume</th>
</tr>
<tr class='odd'>
<td align="center">1</td>
<td align="left">
http://xyz.com
</td>
<td align="right">210,779,783<br />(939,265 / 499,584)</td>
</tr>
<tr class='even'>
<td align="center">2</td>
<td align="left">
http://abc.com
</td>
<td align="right">57,450,834<br />(288,915 / 62,935)</td>
</tr>
</table>
I want to get all domains with their volume(in array or var) for example
http://xyz.com - 210,779,783
Should I use regex or HTML dom in this case. I don't know how to parse large table, can you please help, thanks.

Answer 1

here's an XPath example that happens to parse the HTML from the question.
<?php
$dom = new DOMDocument();
$dom->loadHTMLFile("./input.html");
$xpath = new DOMXPath($dom);
$trs = $xpath->query("//table[#class='resultstable'][1]/tr");
foreach ($trs as $tr) {
$tdList = $xpath->query("td[2]/a", $tr);
if ($tdList->length == 0) continue;
$name = $tdList->item(0)->nodeValue;
$tdList = $xpath->query("td[3]", $tr);
$vol = $tdList->item(0)->childNodes->item(0)->nodeValue;
echo "name: {$name}, vol: {$vol}\n";
}
?>