Error RSS PHP

<?php
require_once '/home/nielsender/domains/uniting-gamers.com/private_html/config.php';
ini_set( 'display_errors', 1 );
error_reporting( E_ALL | E_STRICT );

date_default_timezone_set( 'Europe/Amsterdam' );

$newsItems =
    array
    ( ?>
	<?php 
		$result = mysql_query("SELECT DISTINCT * FROM news ORDER BY date DESC LIMIT 10");
		while($row = mysql_fetch_array($result)){
		$title = $row['title'];
		$description = $row['description'];
		echo "array
        (
            'title' => '$title',
            'description' => '$description',
            'datetime' => ''
        ),"; }
	);

$xmlNamespace = '<?xml version="1.0" encoding="utf-8"?>';
$xml = new SimpleXMLElement( $xmlNamespace . '<rss/>' );
$xml->addAttribute( 'version', '2.0' );

$channelNode = $xml->addChild( 'channel' );

$channelNode->addChild( 'title', 'Uniting-Gamers.nl News' );

$channelNode->addChild( 'link', 'http://www.uniting-gamers.com/');

$channelNode->addChild( 'description', 'Het laatste nieuws van Uniting-Gamers.com' );

$channelNode->addChild( 'pubDate', date( 'r' ) );

$channelNode->addChild( 'copyright', '(c) copyright' );

foreach( $newsItems as $newsItem )
{

    $itemNode = $channelNode->addChild( 'item' );

    $itemNode->addChild( 'title', $newsItem['title'] );

    $itemNode->addChild( 'description', $newsItem['description'] );

    $itemNode->addChild( 'pubDate', date( 'r', strtotime( $newsItem['datetime'] ) ) );
}

header( 'Content-Type: application/xml' );
echo $xml->asXML();
?>