Elep

<?php
/**
 * The stylesheet class for the sitemaps.
 *
 * @since      0.9.0
 * @package    RankMath
 * @subpackage RankMath\Sitemap
 * @author     Rank Math <support@rankmath.com>
 *
 * @copyright Copyright (C) 2008-2019, Yoast BV
 * The following code is a derivative work of the code from the Yoast(https://github.com/Yoast/wordpress-seo/), which is licensed under GPL v3.
 */

namespace RankMath\Sitemap;

use RankMath\Traits\Hooker;

defined( 'ABSPATH' ) || exit;

/**
 * Stylesheet class.
 */
class Stylesheet extends XML {

use Hooker;

/**
	 * Hold sitemap type.
	 *
	 * @var string
	 */
	public $type;

/**
	 * Output the XSL for the XML sitemap.
	 *
	 * @param string $type Sitemap type.
	 */
	public function output( $type ) {
		$this->type = $type;

$expires = gmdate( 'D, d M Y H:i:s', ( time() + YEAR_IN_SECONDS ) );
		$this->send_headers(
			[
				'Cache-Control' => 'maxage=' . YEAR_IN_SECONDS,
				'Expires'       => $expires . ' GMT',
				'Etag'          => md5( $expires . $this->type ),
			],
			true
		);

/* translators: 1. separator, 2. blogname */
		$title = sprintf( __( 'XML Sitemap %1$s %2$s', 'rank-math' ), '-', get_bloginfo( 'name', 'display' ) );

/* translators: 1. separator, 2. blogname */
		$kml_title = sprintf( __( 'Locations Sitemap %1$s %2$s', 'rank-math' ), '-', get_bloginfo( 'name', 'display' ) );

if ( 'main' !== $type ) {
			/**
			 * Fires for the output of XSL for XML sitemaps, other than type "main".
			 */
			$this->do_action( "sitemap/xsl_{$type}", $title, $kml_title );
			die;
		}

require_once 'sitemap-xsl.php';
		die;
	}
}