(no version information, might be only in CVS)
DomNode->append_sibling -- 
   Adds new sibling to a node
  
Description
domelement 
DomNode->append_sibling ( domelement newnode )
   This functions appends a sibling to an existing node.
   The child can be created with e.g.
   domdocument_create_element(),
   domdocument_create_text() etc. or simply by using any
   other node.
  
   Before a new sibling is added it is first duplicated. Therefore the new
   child is a completely new copy which can be modified without changing the
   node which was passed to this function. If the node passed has children
   itself, they will be duplicated as well, which makes it quite easy to
   duplicate large parts of an XML document. The return value is the
   added sibling. If you plan to do further modifications on the added
   sibling you must use the returned node.
  
   This function has been added to provide the behaviour of
   domnode_append_child() as it works till PHP 4.2.
  
   See also domnode_append_before().