(PHP 4 >= 4.1.0)
DomNode->parent_node — Returns the parent of the node
This function returns the parent node.
(PHP >= 4.3 only) If no parent is found, NULL is returned.
The following example will show two identical lists of children.
Example #1 Finding the document of a node
<?php
$doc = domxml_new_doc("1.0");
$node = $doc->create_element("para");
$node = $doc->append_child($node);
$children = $doc->children();
print_r($children);
$doc2 = $node->parent_node();
$children = $doc2->children();
print_r($children);
?>