DomDocument::document_element

(PHP 4 >= 4.1.0)

DomDocument::document_element — Returns root element node

说明

domelement DomDocument::document_element ( void )

This function returns the root element node of a document.

The following example returns just the element with name CHAPTER and prints it. The other node -- the comment -- is not returned.

Example #1 Retrieving root element


<?php
include("example.inc");

if (!$dom = domxml_open_mem($xmlstr)) {
  echo "Error while parsing the document\n";
  exit;
}

$root = $dom->document_element();
print_r($root);
?>

以上例程会输出：

domelement Object
(
    [type] => 1
    [tagname] => chapter
    [0] => 6
    [1] => 137960648
)

PHP手册 - N: Returns root element node

用户评论:

jaworskidaniel no at spam gmail dot com (14-Jul-2008 01:19)

in php5 $root = $dom->documentElement; $tag = $root->tagName;

misterffoeg at hotmail dot com (11-Dec-2007 11:03)

The last note is incorrect. The class he is referring to is DOMDocument, not DomDocument. This page is for the PHP 4 extension. Doing "new DomDocument" would be a fatal error in PHP 5 unless you hacked the old extension into it which would be a very useless move.

rianfowler no at spam gmail dot com (02-Apr-2007 01:51)

The domelement returned by this will function as a domnode object for things like ->append_child. $nodeChild = myxmldoc->create_element('child'); $nodeRoot = $this->myxmldoc->document_element(); $nodeRoot->append_child($nodeChild);

filipp at mac dot com (30-Dec-2006 10:29)

as of PHP 5 (tested with 5.1.4), remember to use documentElement instead. As in: $dom = new DomDocument (); $dom -> load ('file.xml'); $newEl = $dom -> createElement ('newEl'); $dom -> documentElement -> appendChild ($newEl);