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<?php
/**
* Sitemaps: WP_Sitemaps_Index class.
*
* Generates the sitemap index.
*
* @package WordPress
* @subpackage Sitemaps
* @since 5.5.0
*/
/**
* Class WP_Sitemaps_Index.
* Builds the sitemap index page that lists the links to all of the sitemaps.
*
* @since 5.5.0
*/
#[AllowDynamicProperties]
class WP_Sitemaps_Index {
/**
* The main registry of supported sitemaps.
*
* @since 5.5.0
* @var WP_Sitemaps_Registry
*/
protected $registry;
/**
* Maximum number of sitemaps to include in an index.
*
* @since 5.5.0
*
* @var int Maximum number of sitemaps.
*/
private $max_sitemaps = 50000;
/**
* WP_Sitemaps_Index constructor.
*
* @since 5.5.0
*
* @param WP_Sitemaps_Registry $registry Sitemap provider registry.
*/
public function __construct( WP_Sitemaps_Registry $registry ) {
$this->registry = $registry;
}
/**
* Gets a sitemap list for the index.
*
* @since 5.5.0
*
* @return array[] Array of all sitemaps.
*/
public function get_sitemap_list() {
$sitemaps = array();
$providers = $this->registry->get_providers();
/* @var WP_Sitemaps_Provider $provider */
foreach ( $providers as $name => $provider ) {
$sitemap_entries = $provider->get_sitemap_entries();
// Prevent issues with array_push and empty arrays on PHP < 7.3.
if ( ! $sitemap_entries ) {
continue;
}
// Using array_push is more efficient than array_merge in a loop.
array_push( $sitemaps, ...$sitemap_entries );
if ( count( $sitemaps ) >= $this->max_sitemaps ) {
break;
}
}
return array_slice( $sitemaps, 0, $this->max_sitemaps, true );
}
/**
* Builds the URL for the sitemap index.
*
* @since 5.5.0
*
* @global WP_Rewrite $wp_rewrite WordPress rewrite component.
*
* @return string The sitemap index URL.
*/
public function get_index_url() {
global $wp_rewrite;
if ( ! $wp_rewrite->using_permalinks() ) {
return home_url( '/?sitemap=index' );
}
return home_url( '/wp-sitemap.xml' );
}
}