PHP: DOMNode->insertBefore()

DOMNode->insertBefore()

(no version information, might be only in CVS)

DOMNode->insertBefore() -- Adds a new child before a reference node

Описание

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.

Список параметров

newnode: The new node.
refnode: The reference node. If not supplied, newnode is appended to the children.

Возвращаемые значения

The inserted node.

Исключения

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.

DOMNode->insertBefore()

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25-Aug-2005 11:34


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>

jg at handcode dot de
18-Aug-2005 12:18


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
03-Jun-2005 12:45


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);