php - Accessing a single XML DOM Document node -

i new dom documents, trying do, load rss feed in , select 1 node, , save xml file.

here xml loading web feed:

<?xml version="1.0" encoding="utf-8"?> <rss version="2.0">     <channel>         <title>markets</title>         <description/>         <link>http://www.website.com</link>         <language>en-us</language>         <copyright>xml output copyright</copyright>         <ttl>15</ttl>         <pubdate>tue, 16 nov 2010 09:38:00 +0000</pubdate>         <webmaster>admin@website.com</webmaster>         <image>             <title>title</title>             <url>http://www.website.com/images/xmllogo.gif</url>             <link>http://www.website.com</link>             <width>144</width>             <height>16</height>         </image>               <item>                 <title>title</title>                 <description>the description goes here                 </description>                 <enclosure url="http://www.website.com/images/image.png" type="image/png"/>              </item>      </channel> </rss> 

here lame attempt @ getting <description> node , saving feed.xml:

<?php        $feed = new domdocument();     $feed->load('http://www.website.com/directory/directory/cz.c');     $nodevalue = $feed->getelementsbytagname('description')->item(0)->nodevalue;     $feed->save("feed.xml");  ?> 

so need description tag, , save xml file.

any appreciated, thanx in advance!

almost correct. "outerxml" of node, can pass node savexml()

$feed = new domdocument(); $feed->load('http://www.website.com/directory/directory/cz.c'); $xml = $feed->savexml($feed->getelementsbytagname('description')->item(0)); file_put_contents("feed.xml", $xml); 

saving file_put_contents not include xml prolog. note in example, first description element empty, file contain <description/>.

if want extract node standalone xml document, have instantiate new domdocument , import domnode , use save().

$dom = new domdocument($feed->xmlversion, $feed->xmlencoding); $dom->appendchild(     $dom->importnode(         $feed->getelementsbytagname('description')->item(0),         true     ) ); echo $dom->save('new.xml');