Question

This is my starting xml :

 <?xml version="1.0" encoding="utf-8"?>
    <root>
      <child>
        <children></children>
     </child>
    </root>

and I wanna add other children in child?? but I’m trying and nothing I don’t know how… :S help pls I want to my xml be to like this

  <?xml version="1.0" encoding="utf-8"?>
    <root>
      <child>
        <children></children>
        <children></children>
     </child>
    </root>

Here is my code :

<?php
            $dom = new DomDocument;
            //$dom->preserveWhiteSpace = FALSE;
            $dom->load("myXML.xml");
            $root = $dom->getElementById('root');
            $params = $dom->getElementsByTagName('child');
            $cantidadCategorias = $params->length+1;

            $newElement = $dom->createElement('child','');
            $dom->appendChild($newElement);
            $f = fopen("myXML.xml",'w+'); 
            fwrite($f,$dom->saveXML()); 
            fclose($f); 

Answer 1

With DOMDocument it’s as easy as this:

$child = new DOMElement('children');
$parent->appendChild($child);

Whereas $parent is the DOMElement parent which (after you have updated your question) to aquire is part of your problem:

// append <children> to the first <child> element
$parent = $dom->getElementsByTagName('child')->item(0);
$child = new DOMElement('children');
$parent->appendChild($child);