- var_dump: documentation ( source)
- array_keys: documentation ( source)
- iterator_to_array: documentation ( source)
<?php
$xml = '<items><item/><item/><item/><foo:bar xmlns:foo="urn:foo"/></items>';
$dom = new DOMDocument();
$dom->loadXml($xml);
$xpath = new DOMXpath($dom);
$array = iterator_to_array($xpath->evaluate('//*'));
var_dump(count($array), array_keys($array));