Write in XML using PHP

Hello,
I have a file test.xml and it looks like this:

<?xml version="1.0"?>
<xml>
  <track>
    <path>records/[COLOR="Red"]artist[/COLOR]/record1.mp3</path>
    <title>track01</title>
  </track>
</xml>

PHP:

I want using a php script to be able to add a new record to the xml file. Artist is a php variable that I`ll use in the php script. After adding for example record2.mp3 I want the .xml file to look like this:

<?xml version="1.0"?>
<xml>
  <track>
    <path>records/artist/record1.mp3</path>
    <title>track01</title>
  </track>
  <track>
    <path>records/artist/record2.mp3</path>
    <title>track01</title>
  </track>
</xml>

PHP:

and to be saved.

Thank you!

 

Easiest way (without using bulky XML handling features): I didn't fully understand your stuff about artists, but I'm pretty sure anyone could tweak this to how they need it.

<?php

define( 'FILE', 'f.xml' );

function addTrack( $path, $title = '' )
{
    $file = file_get_contents( FILE );
    $file = str_replace('</xml>', $add = "\t<track>\n\t\t<path>$path</path>\n\t\t<title>$title</title>\n\t</track>\n</xml>", $file);
    file_put_contents(FILE, $file);
}

addTrack('path', 'title');

PHP:

Uses tabs to indent lines.

 

This is what I want !!!

THANK YOU VERY MUCH Danltn!!!!
:* :* :* :*