- var_dump: documentation ( source)
<?php
$doc = new DOMDocument();
$doc->loadXML('<html>just <example a="b">Test</example> testing</html>');
$example = $doc->getElementsByTagName('example')->item(0);
//$attr = $example->getAttributeNode('a');
foreach($example->attributes as $attr) var_dump($attr->name);
var_dump($attr->name);