สอบถามเรื่องการเขียน rss.xml หน่อยค่ะ มันขึ้น error.. his page contains the following errors: error on line 22 at column 15025: xmlParseEntityRef: no name

<?php 
require("../../include/start_connection.php");
$sql = "select * from xx_rssfeed order by xx_rssfeed_id desc";
$query = mysql_db_query($dbas_name, $sql); 

$data .= '<?xml version="1.0" encoding="utf-8"?>'."\n";
$data .= '<rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:wfw="http://wellformedweb.org/CommentAPI/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
	xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
	>'."\n";
$data .= '<channel>'."\n";
$data .= '<title>xx</title>'."\n";
$data .= '<link>http://www.xx.com</link>'."\n";
$data .= '<description>xx</description>'."\n";
$data .= '<language>th-TH</language>'."\n";
$data .= '<lastBuildDate>'.date("D, d M Y H:i:s O").'</lastBuildDate>'."\n";
$data .= '<copyright>Copyright xx.com</copyright>'."\n";
$data .= '<image>'."\n";
$data .= '<title>xx</title>'."\n";
$data .= '<url>http://www.xx.com/images/logo.gif</url>'."\n";
$data .= '<link>http://www.xx.com</link>'."\n";
$data .= '</image>'."\n";



while($result = mysql_fetch_array($query)) {
$data .= '<item>';
$data .= '<title>'.$result[xx_rssfeed_topic].'</title>';
$data .= '<link>'.$result[xx_rssfeed_link].'</link>'; 
$data .= '<description><![CDATA['.$result[xx_rssfeed_description].']]></description>';
$data .= '<pubDate>'.date('D, d M Y H:i:s O', $result[xx_rssfeed_publicdate]).'</pubDate>';
$data .= '<image>';
$data .= '<url>'.$result[xx_rssfeed_photo].'</url>';
$data .= '</image>';
$data .= '</item>';
}

$data .= '</channel>'."\n";
$data .= '</rss>'."\n";

$f = fopen( '../../rss/rss.xml' , 'w' ); 
fputs( $f , $data );
fclose( $f );
?>