(PHP 5, PHP 7, PHP 8)
DOMNode::insertBefore — Yeni çocuğu belirtilen çocuğun öncesine yerleştirir
yeni düğümü mevcut düğümün
hemen öncesine yerleştirir. Eklenen çocukta değişiklik yapmayı
düşünüyorsanız dönen düğümü kullanın.
yeniYeni çocuk düğüm.
mevcut
Mevcut çocuk düğüm. Belirtilmediği takdirde
yeni düğüm listeye son çocuk olarak eklenir.
Yerleştirilen düğüm veya hata durumunda false.
DOM_NO_MODIFICATION_ALLOWED_ERRDüğüm salt okunursa veya düğümün önceki ebeveyni salt okunur olarak yerleştirilmişse bu hata oluşur.
DOM_HIERARCHY_REQUEST_ERR
Düğüm, yeni düğümün türündeki çocuk düğümlere
izin vermeyen türde ise veya yeni düğüm, çocuğu
olacağı düğümün ebeveyni veya atalarından biri ise bu hata oluşur.
DOM_WRONG_DOCUMENT_ERR
Eğer yeni düğüm, çocuğu olacağı düğümü
oluşturan belgeden farklı bir belge tarafından oluşturulmuşsa bu hata
oluşur.
DOM_NOT_FOUND_ERR
mevcut düğüm, bir çocuk düğüm değilse bu hata
oluşur.
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);Note that supplying the same node for $newnode and $refnode leads to an E_WARNING ("Couldn't add newnode as the previous sibling of refnode"). For example imagine one wanted to make $newnode the first child of its parent by doing:
<?php
$firstSibling = $newnode->parentNode->firstChild;
// Bad:
$newnode->parentNode->insertBefore( $newnode, $firstSibling );
?>
This would generate a warning if it already was the first child of its parent, since $newnode and $firstSibling are identical. Easy to work around though:
<?php
$firstSibling = $newnode->parentNode->firstChild;
// Better:
if( $newnode !== $firstSibling ) {
$newnode->parentNode->insertBefore( $newnode, $firstSibling );
}
?>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();
?>Sorry, my previous posting worked only for the top node. Here the corrected version, which will work for any node:
XML
----
<?xml version="1.0"?>
<contacts>
<person>Adam</person>
<person>Eva</person>
<person>Thomas</person>
</contacts>
PHP
---
<?php
// load XML, create XPath object
$xml = new DomDocument();
$xml->preserveWhitespace = false;
$xml->load('contacts.xml');
$xpath = new DOMXPath($xml);
// get node eva, which we will append to
$eva = $xpath->query('/contacts/person[.="Eva"]')->item(0);
// create node john
$john = $xml->createElement('person', 'John');
// insert john after eva
// "in eva's parent node (=contacts) insert
// john before eva's next node"
// this also works if eva would be the last node
$eva->parentNode->insertBefore($john, $eva->nextSibling);
// show result
header('Content-Type: text/plain');
print $xml->saveXML();
?>
Result
------
<?xml version="1.0"?>
<contacts>
<person>Adam</person>
<person>Eva</person><person>John</person>
<person>Thomas</person>
</contacts>The previous example is incorrect, and causes a DOM_NOT_FOUND error, as the child nodes are not direct descendants of the root node.
Therefore, the line:
$parent_path = "/root";
needs to change to:
$parent_path = "/root/parent";
or
$parent_path = "//parent";
for this example to work