How to create a PHP file that returns a list of nodes as XML?

Question

How do I create a PHP file that returns a list of nodes as XML when called if I have a menu structure like this:

<GalleryXML>
--gallery 1
---Item 1
---Item 2
---Item 3

And I want a url like localhost/getgallery.php

this url will then return my gallery as xml, something like this

<galleryXML>
    <gallery name="gallery1">
        <item name="item1">
            <image>localhost/site/default/image1</image>
            <imagethumb>localhost/site/default/image1</imagethumb>
            <url>http://google.com</url>
            <description>lorum ipsom</description>
        </item>
    </gallery>
</galleryXML>

Where Image, Imagethumb, url and description are fields on the item node

Thanks in Advance!

Answer 1

This is what i did:

1. I created a view.
2. Changed the style to XML data document (Need to download the Views Datasource module)
3. Added the fields I needed and Nodequeue
4. Added a filter to filter by node type so it looks like this:

then I added a new page with a path:

my end result looks like this:

 <node>
    <node>
        <Description>blablalbla</Description>
        <Image>
        sites/default/files/articles/siteadmin/test.png
        </Image>
        <ImageBig>sites/default/files/test.png</ImageBig>
        <Link>derp</Link>
        <gallery>Gallery1 For flash</gallery>
    </node>
    <node>
        <Description>sdfsdfdf</Description>
        <Image>
        sites/default/files/articles/siteadmin/test.png
        </Image>
        <ImageBig>sites/default/files/test.png</ImageBig>
        <Link>sdfdf</Link>
        <gallery>Gallery2 For flash</gallery>
    </node>
</node>