moving an existing node within the DomDocument:
<root>
<parent>
<child><name>Bob</name></child>
<child><name>Sue</name></child>
</parent>
</root>
$dom = new DomDocument();
$dom->load("sample.xml");
$parent_path = "/root";
$query = "//child[position() = 2]";
$query2 = "//child[position() = 1]";
$xpath = new DomXPath($dom);
$parent = $xpath->query($parent_path);
$under = $xpath->query($query);
$above = $xpath->query($query2);
$parent->item(0)->insertBefore($under->item(0), $above->item(0));
$dom->save("sample.xml");
Should produce:
<root>
<parent>
<child><name>Sue</name></child>
<child><name>Bob</name></child>
</parent>
</root>
DOMNode->insertBefore()
(no version information, might be only in CVS)
DOMNode->insertBefore() -- Adds a new child before a reference node说明
class DOMNode {DOMNode insertBefore ( DOMNode newnode [, DOMNode refnode] )
}
This function inserts a new node right before the reference node. If you plan to do further modifications on the appended child you must use the returned node.
参数
- newnode
The new node.
- refnode
The reference node. If not supplied, newnode is appended to the children.
异常
- DOM_NO_MODIFICATION_ALLOWED_ERR
Raised if this node is readonly or if the previous parent of the node being inserted is readonly.
- DOM_HIERARCHY_REQUEST_ERR
Raised if this node is of a type that does not allow children of the type of the newnode node, or if the node to append is one of this node's ancestors or this node itself.
- DOM_WRONG_DOCUMENT_ERR
Raised if newnode was created from a different document than the one that created this node.
- DOM_NOT_FOUND
Raised if refnode is not a child of this node.
add a note
User Contributed Notes
26-Aug-2005 02:34
jg at handcode dot de
19-Aug-2005 03:18
19-Aug-2005 03:18
example to insert <newnode/> between <chid1/> and <child2/>
<?xml version="1.0" encoding="ISO-8859-1" ?>
<root>
<parent>
<child nr="1"/>
<child nr="2"/>
</parent>
</root>
<?php
$xml_src = 'test.xml';
// XPath-Querys
$parent_path = "//parent";
$next_path = "//parent/child[@nr='2']";
// Create a new DOM document
$dom = new DomDocument();
$dom->load($xml_src);
// Find the parent node
$xpath = new DomXPath($dom);
// Find parent node
$parent = $xpath->query($parent_path);
// new node will be inserted before this node
$next = $xpath->query($next_path);
// Create the new element
$element = $dom->createElement('newnode');
// Insert the new element
$parent->item(0)->insertBefore($element, $next->item(0));
echo $dom->saveXML();
?>
Jerry Ellis
04-Jun-2005 03:45
04-Jun-2005 03:45
1st argument) a node to insert
2nd argument) a reference node - this is the node that the new node will be inserted before
The trick to using this method is that the OBJECT on which you actually CALL the insertBefore() method is actually the PARENT node of the reference node!
INCORRECT:
$DOMNode_refNode->insertBefore($DOMNode_newNode, $DOMNode_refNode);
CORRECT:
$DOMNode_refNode->parentNode->insertBefore($DOMNode_newNode, $DOMNode_refNode);