如何在xml文件中的关闭标签之前插入多个数据？

Question

我想sitemap.xml通过 PHP生成DOMDocument现在我有三个数组：$category[] = array(    'loc' => 'http://example.com/?=10',    'lastmod' => '2019-05-12 10:47:05',    'changefreq' => 'always',     'priority' => '1.0');$board[] = array(    'loc' => 'http://example.com/?=3',    'lastmod' => '2019-05-12 10:47:05',    'changefreq' => 'always',     'priority' => '1.0');$article[] = array(    'loc' => 'http://example.com/?='.$row['id'],    'lastmod' => $row['last_mod'],    'changefreq' => $row['changefreq'],    'priority' => $row['priority']);选项：//Set Sitemap$seoOption = array(    'version' => '1.0',    'charset' => 'UTF-8',    'xml_filename' => 'seo.xml');$seo = new SitemapGenerator($seoOption);$seo->generateXML($category);$seo->generateXML($board);$seo->generateXML($article);