Dynamic XML from PHP and MySQL

Hi,

I'm learning php and I'm trying to get to grips with dynamic xml and php  coming from a database.  The trouble I am having is I can't get my code  to give any output.  I don't get an error I message, I just can't get  the xml to display.  If anyone can give me any pointers as to what I'm  doing wrong that would be great...

Here's the code I have.

<?php   

DEFINE ('DB_USER', 'root'); 

DEFINE ('DB_PASSWORD', 'password'); 

DEFINE ('DB_HOST', 'localhost'); 

DEFINE ('DB_NAME', 'flashphpbible');  



$link = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME); 



$query = "SELECT * FROM dynamicxml WHERE id=1"; 

$result = mysqli_query($link, $query);  

$xmlData .= " "; 

$xmlData .= "<store>\n";   



while($row = mysqli_fetch_array($result)); 

{     

$xmlData .= " <item>\n";     

$xmlData .= "     <name>".$row['name']."</name>\n";     $xmlData .= "     <section>".$row['section']."</section>\n";     $xmlData .= "     <price>".$row['price']."</price>\n"; 

$xmlData .= "     <inStock>".$row['instock']."</inStock>\n";     $xmlData .= " </item>\n";  

}  



$xmlData .= "</store>\n";  echo "response=".$xmlData; ?>

Thanks for any help offered.
Ben.