Using PHP to retrieve and display file from MySQL database

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I am trying to download a file from MySQL and display it using the
following PHP script,
but it isn't displaying the file just a list of files in the database.
Please help.

---- Code Begin ----
<?
if(isset($_GET['id']))
{
	include 'library/config.php';
	include 'library/opendb.php';

	$id      = $_GET['id'];
	$query   = "SELECT name, type, size, content FROM upload WHERE id = '$id'";
	$result  = mysql_query($query) or die('Error, query failed');
	list($name, $type, $size, $content) = mysql_fetch_array($result);

	header("Content-Disposition: attachment; filename=$name");
	header("Content-length: $size");
	header("Content-type: $type");
	echo $content;

	include 'library/closedb.php';	
	exit;
}

?>
<html>
<head>
<title>Download File From MySQL</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>

<body>
<?
include 'library/config.php';
include 'library/opendb.php';

$query  = "SELECT id, name FROM upload";
$result = mysql_query($query) or die('Error, query failed');
if(mysql_num_rows($result) == 0)
{
	echo "Database is empty <br>";
}
else
{
	while(list($id, $name) = mysql_fetch_array($result))
	{
?>
	<a href="download.php?id=<?=$id;?>"><?=$name;?></a> <br>
<?		
	}
}
include 'library/closedb.php';
?>
</body>
</html>

---- Code End ----

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