--TEST--
Dom\HTMLDocument serialization of an attribute in a namespace
--EXTENSIONS--
dom
--FILE--
<?php

$dom = Dom\HTMLDocument::createEmpty();
$root = $dom->appendChild($dom->createElement("root"));
$root->setAttributeNodeNS($dom->createAttributeNS("http://php.net", "x:foo"));
$root->setAttributeNodeNS($dom->createAttributeNS("http://www.w3.org/XML/1998/namespace", "y:id"));
$root->setAttributeNodeNS($dom->createAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns"));
$root->setAttributeNodeNS($dom->createAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:f"));
$root->setAttributeNodeNS($dom->createAttributeNS("http://www.w3.org/1999/xlink", "z:f"));

// Note: XML declarations are not emitted in HTML5
echo $dom->saveHtml();

?>
--EXPECT--
<root x:foo="" xml:id="" xmlns="" xmlns:f="" xlink:f=""></root>