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PHTML

<?php
/**
* The sitemap index runner class.
*
* @since 1.0.42
* @package RankMath
* @subpackage RankMath\Sitemap
* @author Rank Math <support@rankmath.com>
*/
namespace RankMath\Sitemap;
use RankMath\Runner;
use RankMath\Traits\Hooker;
use RankMath\Helpers\Str;
defined( 'ABSPATH' ) || exit;
/**
* Sitemap Index class.
*/
class Sitemap_Index implements Runner {
use Hooker;
/**
* The hooks.
*/
public function hooks() {
$this->filter( 'robots_txt', 'add_sitemap_directive', 0, 2 );
$this->filter( 'redirect_canonical', 'redirect_canonical' );
}
/**
* Adds the sitemap index to robots.txt.
*
* @param string $output robots.txt output.
* @param bool $public Whether the site is public or not.
*
* @return string robots.txt output.
*/
public function add_sitemap_directive( $output, $public ) {
if (
'0' === $public ||
Str::contains( 'Sitemap:', $output ) ||
Str::contains( 'sitemap:', $output )
) {
return $output;
}
$sitemap_url = esc_url( Router::get_base_url( Sitemap::get_sitemap_index_slug() . '.xml' ) );
return $output . "\nSitemap: {$sitemap_url}\n";
}
/**
* Stop trailing slashes on `sitemap.xml` URLs.
*
* @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.
*
* @param string $redirect The redirect URL currently determined.
*
* @return boolean|string $redirect
*/
public function redirect_canonical( $redirect ) {
if ( get_query_var( 'sitemap' ) || get_query_var( 'xsl' ) ) {
return false;
}
return $redirect;
}
}