WP_Sitemaps_Stylesheet::get_sitemap_index_stylesheet() WordPress Method

	public function get_sitemap_index_stylesheet() {
		$css         = $this->get_stylesheet_css();
		$title       = esc_xml( __( 'XML Sitemap' ) );
		$description = esc_xml( __( 'This XML Sitemap is generated by WordPress to make your content more visible for search engines.' ) );
		$learn_more  = sprintf(
			'<a href="%s">%s</a>',
			esc_url( __( 'https://www.sitemaps.org/' ) ),
			esc_xml( __( 'Learn more about XML sitemaps.' ) )
		);

		$text = sprintf(
			/* translators: %s: Number of URLs. */
			esc_xml( __( 'Number of URLs in this XML Sitemap: %s.' ) ),
			'<xsl:value-of select="count( sitemap:sitemapindex/sitemap:sitemap )" />'
		);

		$lang    = get_language_attributes( 'html' );
		$url     = esc_xml( __( 'URL' ) );
		$lastmod = esc_xml( __( 'Last Modified' ) );

		$xsl_content = <<<XSL
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet
		version="1.0"
		xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
		xmlns:sitemap="http://www.sitemaps.org/schemas/sitemap/0.9"
		exclude-result-prefixes="sitemap"
		>

	<xsl:output method="html" encoding="UTF-8" indent="yes" />

	<!--
	  Set variables for whether lastmod occurs for any sitemap in the index.
	  We do this up front because it can be expensive in a large sitemap.
	  -->
	<xsl:variable name="has-lastmod" select="count( /sitemap:sitemapindex/sitemap:sitemap/sitemap:lastmod )" />

	<xsl:template match="/">
		<html {$lang}>
			<head>
				<title>{$title}</title>
				<style>
					{$css}
				</style>
			</head>
			<body>
				<div id="sitemap">
					<div id="sitemap__header">
						<h1>{$title}</h1>
						<p>{$description}</p>
						<p>{$learn_more}</p>
					</div>
					<div id="sitemap__content">
						<p class="text">{$text}</p>
						<table id="sitemap__table">
							<thead>
								<tr>
									<th class="loc">{$url}</th>
									<xsl:if test="\$has-lastmod">
										<th class="lastmod">{$lastmod}</th>
									</xsl:if>
								</tr>
							</thead>
							<tbody>
								<xsl:for-each select="sitemap:sitemapindex/sitemap:sitemap">
									<tr>
										<td class="loc"><a href="{sitemap:loc}"><xsl:value-of select="sitemap:loc" /></a></td>
										<xsl:if test="\$has-lastmod">
											<td class="lastmod"><xsl:value-of select="sitemap:lastmod" /></td>
										</xsl:if>
									</tr>
								</xsl:for-each>
							</tbody>
						</table>
					</div>
				</div>
			</body>
		</html>
	</xsl:template>
</xsl:stylesheet>

XSL;

		/**
		 * Filters the content of the sitemap index stylesheet.
		 *
		 * @since 5.5.0
		 *
		 * @param string $xsl_content Full content for the XML stylesheet.
		 */
		return apply_filters( 'wp_sitemaps_stylesheet_index_content', $xsl_content );
	}
Uses	Description
wp-includes/formatting.php:esc_xml()	Escaping for XML blocks.
wp-includes/sitemaps/class-wp-sitemaps-stylesheet.php:WP_Sitemaps_Stylesheet::get_stylesheet_css()	Gets the CSS to be included in sitemap XSL stylesheets.
wp-includes/sitemaps/class-wp-sitemaps-stylesheet.php:wp_sitemaps_stylesheet_index_content	Filters the content of the sitemap index stylesheet.
wp-includes/general-template.php:get_language_attributes()	Gets the language attributes for the ‘html’ tag.
wp-includes/l10n.php:__()	Retrieve the translation of $text.
wp-includes/formatting.php:esc_url()	Checks and cleans a URL.
wp-includes/plugin.php:apply_filters()	Calls the callback functions that have been added to a filter hook.