xpath sample

gistfile1.php

<?php

$string = <<<XML
<?xml version="1.0"?>
<string xmlns="http://www.barefoot.com/Services/">
	<PropertyList>
		<Property>
			<PropertyID>7081</PropertyID>
        </Property>
        <Property>
			<PropertyID>2453</PropertyID>
        </Property>
        <Property>
			<PropertyID>7898</PropertyID>
        </Property>
    </PropertyList>
</string>
XML;

$doc = new DOMDocument();
$doc->loadXML($string);
$xpath = new DOMXpath($doc);
$xpath->registerNamespace('default','http://www.barefoot.com/Services/');
foreach ($xpath->query("/default:string/default:PropertyList/default:Property/default:PropertyID") as $element) {
    print_r($element->nodeValue);
}