สอบถามเรื่อง PHP สำหรับสร้างไฟล์ XML ค่ะ (PHP, MySQL)

<?php
header("Content-type:text/xml; charset=UTF-8");              
header("Cache-Control: no-store, no-cache, must-revalidate");             
header("Cache-Control: post-check=0, pre-check=0", false);   
echo '<?xml version="1.0" encoding="utf-8"?>';

$objConnect = mysql_connect("localhost","root","root");
$objDB = mysql_select_db("mydatabase");
$strSQL = "SELECT * FROM images WHERE 1  ";
$objQuery = mysql_query($strSQL);
?>
<images>
	<?
	while($obResult = mysql_fetch_array($objQuery))
	{
	?>
		<item>
			<ImageID><?=$obResult["ImageID"];?></ImageID>
			<ItemID><?=$obResult["ItemID"];?></ItemID>
			<ImagePath><?=$obResult["ImagePath"];?></ImagePath>
			<Link><?=$obResult["Link"];?></Link>
		</item>
	<?
	}
	?>
</images>
<?
	mysql_close($objConnect);
?>