PHP MYSQL XML ERROR - php

Question

I have a PHP file which reads the credentials from
require("phpRequireInfo.php");
And, my problem is that it keeps giving me error whenever i were to compile it. My php file looks like this:
<?php
header("Content-type: text/xml");
require("phpRequireInfo.php");
// Start XML file, create parent node
$dom = new DOMDocument("1.0");
$node = $dom->createElement("markers");
$parnode = $dom->appendChild($node);
// Opens a connection to a MySQL server
$connection=mysql_connect ($database, $username, $password);
if (!$connection) { die('Not connected : ' . mysql_error());}
// Set the active MySQL database
$dbname= 'csuser';
// Set the active MySQL database
$db_selected = mysql_select_db($dbname, $connection);
if (!$db_selected) {
die ('Can\'t use db : ' . mysql_error());
}
// Select all the rows in the markers table
$query = "SELECT * FROM Bars ";
$result = mysql_query($query);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
// Iterate through the rows, adding XML nodes for each
while ($row = #mysql_fetch_assoc($result)){
// ADD TO XML DOCUMENT NODE
$node = $dom->createElement("marker");
$newnode = $parnode->appendChild($node);
$newnode->setAttribute("name",$row['Name'] );
}
echo $dom->saveXML();
?>
And the error i am getting is: "error on line 4 at column 6: XML declaration allowed only at the start of the document"
The XML File looks like this when running the PHP FILE:
http://imgur.com/SWCZ8sE
Your help will greatly be appreciated

Answer 1

Why does it has 3 empty lines, at the begining?
try ob_start() before require, and ob_end_clean() before echo, to avoid them
ob_start();
require("phpRequireInfo.php");
.
.
.
ob_end_clean();
echo $dom->saveXML();