/**
 * 使用PHP遍历XML文档树
 *
 * @param 
 * @arrange 512-笔记网： www.jb51.cc
 **/
<?PHP
 function walk_tree ($node,$depth = 0) {
	  for ($i = 0,$indent = ''; $i < $depth; $i++)
		   $indent .= '     ';
	  if ($node->type == XML_ELEMENT_NODE) {
			print ($indent . $node->tagname . "\n");
			$kids = $node->children ();
			$nkids = count ($kids);
			if ($nkids > 0) {
				 $depth++;
				 for ($i = 0; $i < $nkids; $i++)
					  walk_tree ($kids[$i],$depth);
				 $depth--;
		   }
	  }
 }
 $doc = xmldocfile ('contact.xml');
 print ("\n");
 walk_tree ($doc->root ());
 print ("\n");
?>
/***   来自编程之家 jb51.cc（jb51.cc）   ***/

<contact id="43956">
	 <personal>
		  <name>
			   <first>J</first>
			   <middle>J</middle>
			   <last>J</last>
		  </name>
		  <title>Manager</title>
		  <employer>National</employer>
		  <dob>1971-12-22</dob>
	 </personal>
</contact>