Description:
------------
The W3C DOM Level 2 specification at
  http://www.w3.org/TR/DOM-Level-2-Core/core.html#td-live
says about NodeList collections that they should be live, meaning

if a DOM user gets a NodeList object containing the children of an Element, then subsequently adds more children to that element (or removes children, or modifies them), those changes are automatically reflected in the NodeList, without further action on the user's part.

However my test with PHP 4.3.3 and the following settings for DOMXML

DOM/XML 	enabled
DOM/XML API Version 	20020815
libxml Version 	20507
HTML Support 	enabled
XPath Support 	enabled
XPointer Support 	enabled
DOM/XSLT 	enabled
libxslt Version 	1.0.30
libxslt compiled against libxml Version 	2.5.7

shows that the result returned from Node->child_nodes() is not live but static.

Reproduce code:
---------------
<?php
function dumpDoc ($xmlDocument) {
  echo "<p><pre>\n";
  echo htmlentities($xmlDocument->dump_mem(true));
  echo "</pre></p>\n";
}
$xmlDocument = domxml_new_doc("1.0");
$rootElement = $xmlDocument->create_element("gods");
$xmlDocument->append_child($rootElement);
$childNodes = $rootElement->child_nodes();
echo 'count($childNodes): ' . count($childNodes) . "<br>\n";
$xmlDocument->append_child($rootElement);
for ($i = 0; $i < 5; $i++) {
  $god = $xmlDocument->create_element("god");
  $god->set_attribute("name", "god $i");
  $rootElement->append_child($god);
  dumpDoc($xmlDocument);
  echo 'count($childNodes): ' . count($childNodes) . "<br>\n";
}
?>

Expected result:
----------------
I would expect count($childNodes) to be incremented every time $rootElement->append_child($god) is called. That is what the W3C DOM understands to be a live collection, and that is what happens with conformant DOM implementations (as the one in Mozilla or the one in SUN's Java SDK 1.4).

Actual result:
--------------
The output with dump_mem shows that child elements are added but the output of count($childNodes) is always 0.