- simplexml_load_string: documentation ( source)
<?php
$xml=<<<XML
<?xml version="1.0"?>
<root>
<article>
<title>iphone</title>
<description></description>
</article>
<article>
<title>ipod</title>
<description></description>
</article>
<article>
<title>android></title>
<description></description>
</article>
</root>
XML;
$rss=simplexml_load_string($xml);
foreach($rss->xpath('//title[contains(text(),"iphone") or contains(text(),"ipad") or contains(text(),"ipod")]') as $node)
{
echo $node->getName();
echo ": ";
echo (string)$node;
echo "\n";
}