php生成rss订阅

$host = $_server['http_host'];

$xmls = '<?xml version="1.0" encoding="utf-8"?>

<rss version="2.0" xmlns:dc="https://purl.org/dc/elements/1.1/" xmlns:trackback="https://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="https://wellformedweb.org/commentapi/" xmlns:slash="https://purl.org/rss/1.0/modules/slash/">

<channel>';

foreach ($news as $keys => $values) {

//foreach ($values as $key1 => $value1) {

$xmls .= "<item><title>".$values["title"]."</title>"; 

        $xmls .= "<link>https://$host/news.php?id=".$values['id']."</link>";

        //$xmls .= "<description><![$value1[description]]></description>";

        //$xmls .= "<pubdate>".$values["addtime"]."</pubdate>";

        $xmls .= "<dc:creator>$host</dc:creator>";

        //$xmls .= "<description>".$values["addtime"]."</description>";

        $xmls .=  "<category><![cdata[".$values["content"]."]]></category></item>";

        //$xmls .= "</channel>";

//}

}

$xmls .= "</channel></rss>";

echo $xmls;