$xmldoc = domxml_open_mem($xmlstr);
  // get the node root and then the children of it.
  $noderoot = $xmldoc->document_element();
  $childnodes = $noderoot->child_nodes();

  // build the array
  foreach ($childnodes as $value) {
     echo $value->tagname . " : " . $value->get_content() . "<br>";
     $nodeArray[$value->tagname] = $value->get_content();
  }