Omvendt

$xml = simplexml_load_file("../nyheder/$_POST[gem].xml"); 

$sxe = new SimpleXMLElement($xml->asXML()); 
$news = $sxe->addChild("news"); 
$news->addChild("navn", "$_POST[navn]"); 
$news->addChild("startdato", "$_POST[startdato]"); 
$news->addChild("stopdato", "$_POST[stopdato]"); 
$news->addChild("pic", "$_POST[pic]"); 
$news->addChild("fpic", "$_POST[fpic]"); 
$news->addChild("tekst", "$_POST[tekst]"); 
$news->addChild("fulltekst", "$_POST[fulltekst]"); 
$news->addChild("readlink", "$_POST[readlink]"); 
$news->addChild("readtext", "$_POST[readtext]"); 
$news->addChild("arkiv", "$_POST[arkiv]"); 
data added 
$sxe->asXML("../nyheder/$_POST[gem].xml");