PHP & XML Problem

[Lovemonk]

I've written the underneath PHP script and it works at a basic level but i'm trying to add in a bit of finesse on the XML presentation side and i'm falling flat on my face.

What it does is create an XML file from a plain old text file. It works and the XML file is well-formed. However, i did try and dynamically add in some XSL and Schema links, when the XMl file is created, so that the file could be validated. Whatever way i try to do it, the information relevant to the XSL and Schema links appears above the XML file declaration itself. This leads to the document not being well-formed and i'm tearing my hair out.

Just how would i go about adding these in? As you can no doubt guess, i'm new to PHP and i'm sure i'm asking something simple so any help would be gratefully appreciated. Thank you.

<?php

$data0 = $_POST["name"];
$data1 = $_POST["age"];
$data2 = $_POST["rules"];

include("signoff1.inc");
$thankyou = ", thank you.";

echo "<h3>";
echo $name.$thankyou;
echo "</h3>";

include("signoff2.inc");

$fp = fopen ('signoff.txt', 'ab'); 

fwrite ($fp, "$name \n");
fwrite ($fp, "$age \n");
fwrite ($fp, "$rules \n");

fclose ($fp); 


$fields = 3;

 $data = file('signoff.txt');

 $n = count($data);

 $doc = domxml_new_doc('1.0');

 $root = $doc->add_root('signoff');

 $member = $root->new_child('member','');

 for ($i=0; $i<=$n-$fields; $i+=$fields) {

  $member->new_child('name',$data[$i]);

  $member->new_child('age',$data[$i+1]);

  $member->new_child('rules',$data[$i+2]);

  if ($i+2 < $n-1) {

   $member = $root->new_child('member','');
  }
 }

 $fp = fopen('signoffs.xml','w+b');

 if(!$fp) {
    die('Error cannot create  XML file');
 }

 fwrite($fp,$doc->dumpmem());

 fclose($fp);

?>