php5 and xml

I am trying to find a way to add a child node at the top of the node
tree. My xml document has root <songs> and child elements <song>. I need
to be able to insert <song> elements at the top not at the bottom like
appendChild.

Thanks for any help.

Andrew M. wrote:
> I am trying to find a way to add a child node at the top of the node
> tree. My xml document has root <songs> and child elements <song>. I
> need to be able to insert <song> elements at the top not at the
> bottom like appendChild.
>

Use insertBefore, examples:

<?php

$xml = new DomDocument();

// Create and append the root node
$root = $xml->createElement("root");
$xml->appendChild($root);

// Create and add the first child
$child = $xml->createElement("song");
$child->setAttribute("number", 1);
$firstChild = $root->appendChild($child);

// Create and add another child
$child = $xml->createElement("song");
$child->setAttribute("number", 2);
$root->insertBefore($child, $firstChild);

?>

*Or*

<?php

$xml = new DomDocument();

// Create and append the root node
$root = $xml->createElement("root");
$xml->appendChild($root);

// Create and add the first child
$child = $xml->createElement("song");
$child->setAttribute("number", 1);
$root->appendChild($child);

// Create and add another child
$child = $xml->createElement("song");
$child->setAttribute("number", 2);

// Find the first song child element
$firstChild = $root->getElementsByTagName("song")->item(1);
$root->insertBefore($child, $firstChild);

?>


JW

Janwillem Borleffs wrote:
> // Find the first song child element
> $firstChild = $root->getElementsByTagName("song")->item(1);
>

This example is incorrect, you should get the first item:

$firstChild = $root->getElementsByTagName("song")->item(0);


JW

Thank you very much Janwillem. That did the trick . I had a feeling it
was insertBefore but I was having a lot of trouble tracking down
documentation about how to use it.

Janwillem Borleffs wrote:

> Janwillem Borleffs wrote:
>
>>// Find the first song child element
>>$firstChild = $root->getElementsByTagName("song")->item(1);
>>
>
>
> This example is incorrect, you should get the first item:
>
> $firstChild = $root->getElementsByTagName("song")->item(0);
>
>
> JW
>
>
>