(no version information, might be only in CVS)
DomNode->parent_node -- 
     Returns the parent of the node
    
Description
object 
DomNode->parent_node ( void )
     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. 
     
例子 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); ?>
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