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<?php /** * WPSEO plugin file. * * @package WPSEO\XML_Sitemaps */
/** * Class WPSEO_Sitemaps. * * @todo This class could use a general description with some explanation on sitemaps. OR. */ class WPSEO_Sitemaps {
/** * Sitemap index identifier. * * @var string */ const SITEMAP_INDEX_TYPE = '1';
/** * Content of the sitemap to output. * * @var string */ protected $sitemap = '';
/** * Flag to indicate if this is an invalid or empty sitemap. * * @var bool */ public $bad_sitemap = false;
/** * Whether or not the XML sitemap was served from a transient or not. * * @var bool */ private $transient = false;
/** * HTTP protocol to use in headers. * * @since 3.2 * * @var string */ protected $http_protocol = 'HTTP/1.1';
/** * Holds the n variable. * * @var int */ private $current_page = 1;
/** * @var WPSEO_Sitemap_Timezone */ private $timezone;
/** * @since 3.2 * * @var WPSEO_Sitemaps_Router */ public $router;
/** * @since 3.2 * * @var WPSEO_Sitemaps_Renderer */ public $renderer;
/** * @since 3.2 * * @var WPSEO_Sitemaps_Cache */ public $cache;
/** * @since 3.2 * * @var WPSEO_Sitemap_Provider[] */ public $providers;
/** * Class constructor. */ public function __construct() {
add_action( 'after_setup_theme', array( $this, 'init_sitemaps_providers' ) ); add_action( 'after_setup_theme', array( $this, 'reduce_query_load' ), 99 ); add_action( 'pre_get_posts', array( $this, 'redirect' ), 1 ); add_action( 'wpseo_hit_sitemap_index', array( $this, 'hit_sitemap_index' ) ); add_action( 'wpseo_ping_search_engines', array( __CLASS__, 'ping_search_engines' ) );
$this->timezone = new WPSEO_Sitemap_Timezone(); $this->router = new WPSEO_Sitemaps_Router(); $this->renderer = new WPSEO_Sitemaps_Renderer(); $this->cache = new WPSEO_Sitemaps_Cache();
if ( ! empty( $_SERVER['SERVER_PROTOCOL'] ) ) { $this->http_protocol = sanitize_text_field( wp_unslash( $_SERVER['SERVER_PROTOCOL'] ) ); } }
/** * Initialize sitemap providers classes. * * @since 5.3 */ public function init_sitemaps_providers() {
$this->providers = array( new WPSEO_Post_Type_Sitemap_Provider(), new WPSEO_Taxonomy_Sitemap_Provider(), new WPSEO_Author_Sitemap_Provider(), );
$external_providers = apply_filters( 'wpseo_sitemaps_providers', array() );
foreach ( $external_providers as $provider ) { if ( is_object( $provider ) && $provider instanceof WPSEO_Sitemap_Provider ) { $this->providers[] = $provider; } } }
/** * Check the current request URI, if we can determine it's probably an XML sitemap, kill loading the widgets. */ public function reduce_query_load() {
if ( ! isset( $_SERVER['REQUEST_URI'] ) ) { return; }
$request_uri = sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) ); $extension = substr( $request_uri, -4 );
if ( false !== stripos( $request_uri, 'sitemap' ) && in_array( $extension, array( '.xml', '.xsl' ), true ) ) { remove_all_actions( 'widgets_init' ); } }
/** * Register your own sitemap. Call this during 'init'. * * @param string $name The name of the sitemap. * @param callback $function Function to build your sitemap. * @param string $rewrite Optional. Regular expression to match your sitemap with. */ public function register_sitemap( $name, $function, $rewrite = '' ) { add_action( 'wpseo_do_sitemap_' . $name, $function ); if ( ! empty( $rewrite ) ) { add_rewrite_rule( $rewrite, 'index.php?sitemap=' . $name, 'top' ); } }
/** * Register your own XSL file. Call this during 'init'. * * @since 1.4.23 * * @param string $name The name of the XSL file. * @param callback $function Function to build your XSL file. * @param string $rewrite Optional. Regular expression to match your sitemap with. */ public function register_xsl( $name, $function, $rewrite = '' ) { add_action( 'wpseo_xsl_' . $name, $function ); if ( ! empty( $rewrite ) ) { add_rewrite_rule( $rewrite, 'index.php?yoast-sitemap-xsl=' . $name, 'top' ); } }
/** * Set the sitemap current page to allow creating partial sitemaps with WP-CLI * in a one-off process. * * @param integer $current_page The part that should be generated. */ public function set_n( $current_page ) { if ( is_scalar( $current_page ) && intval( $current_page ) > 0 ) { $this->current_page = intval( $current_page ); } }
/** * Set the sitemap content to display after you have generated it. * * @param string $sitemap The generated sitemap to output. */ public function set_sitemap( $sitemap ) { $this->sitemap = $sitemap; }
/** * Set as true to make the request 404. Used stop the display of empty sitemaps or invalid requests. * * @param bool $bool Is this a bad request. True or false. */ public function set_bad_sitemap( $bool ) { $this->bad_sitemap = (bool) $bool; }
/** * Prevent stupid plugins from running shutdown scripts when we're obviously not outputting HTML. * * @since 1.4.16 */ public function sitemap_close() { remove_all_actions( 'wp_footer' ); die(); }
/** * Hijack requests for potential sitemaps and XSL files. * * @param \WP_Query $query Main query instance. */ public function redirect( $query ) {
if ( ! $query->is_main_query() ) { return; }
$yoast_sitemap_xsl = get_query_var( 'yoast-sitemap-xsl' );
if ( ! empty( $yoast_sitemap_xsl ) ) { /* * This is a method to provide the XSL via the home_url. * Needed when the site_url and home_url are not the same. * Loading the XSL needs to come from the same domain, protocol and port as the XML. * * Whenever home_url and site_url are the same, the file can be loaded directly. */ $this->xsl_output( $yoast_sitemap_xsl ); $this->sitemap_close();
return; }
$type = get_query_var( 'sitemap' );
if ( empty( $type ) ) { return; }
$this->set_n( get_query_var( 'sitemap_n' ) );
if ( ! $this->get_sitemap_from_cache( $type, $this->current_page ) ) { $this->build_sitemap( $type ); }
if ( $this->bad_sitemap ) { $query->set_404(); status_header( 404 );
return; }
$this->output(); $this->sitemap_close(); }
/** * Try to get the sitemap from cache. * * @param string $type Sitemap type. * @param int $page_number The page number to retrieve. * * @return bool If the sitemap has been retrieved from cache. */ private function get_sitemap_from_cache( $type, $page_number ) {
$this->transient = false;
if ( true !== $this->cache->is_enabled() ) { return false; }
/** * Fires before the attempt to retrieve XML sitemap from the transient cache. * * @param WPSEO_Sitemaps $sitemaps Sitemaps object. */ do_action( 'wpseo_sitemap_stylesheet_cache_' . $type, $this );
$sitemap_cache_data = $this->cache->get_sitemap_data( $type, $page_number );
// No cache was found, refresh it because cache is enabled. if ( empty( $sitemap_cache_data ) ) { return $this->refresh_sitemap_cache( $type, $page_number ); }
// Cache object was found, parse information. $this->transient = true;
$this->sitemap = $sitemap_cache_data->get_sitemap(); $this->bad_sitemap = ! $sitemap_cache_data->is_usable();
return true; }
/** * Build and save sitemap to cache. * * @param string $type Sitemap type. * @param int $page_number The page number to save to. * * @return bool */ private function refresh_sitemap_cache( $type, $page_number ) { $this->set_n( $page_number ); $this->build_sitemap( $type );
return $this->cache->store_sitemap( $type, $page_number, $this->sitemap, ! $this->bad_sitemap ); }
/** * Attempts to build the requested sitemap. * * Sets $bad_sitemap if this isn't for the root sitemap, a post type or taxonomy. * * @param string $type The requested sitemap's identifier. */ public function build_sitemap( $type ) {
/** * Filter the type of sitemap to build. * * @param string $type Sitemap type, determined by the request. */ $type = apply_filters( 'wpseo_build_sitemap_post_type', $type );
if ( $type === '1' ) { $this->build_root_map();
return; }
$entries_per_page = $this->get_entries_per_page();
foreach ( $this->providers as $provider ) { if ( ! $provider->handles_type( $type ) ) { continue; }
try { $links = $provider->get_sitemap_links( $type, $entries_per_page, $this->current_page ); } catch ( OutOfBoundsException $exception ) { $this->bad_sitemap = true; return; }
$this->sitemap = $this->renderer->get_sitemap( $links, $type, $this->current_page ); return; }
if ( has_action( 'wpseo_do_sitemap_' . $type ) ) { /** * Fires custom handler, if hooked to generate sitemap for the type. */ do_action( 'wpseo_do_sitemap_' . $type );
return; }
$this->bad_sitemap = true; }
/** * Build the root sitemap (example.com/sitemap_index.xml) which lists sub-sitemaps for other content types. */ public function build_root_map() {
$links = array(); $entries_per_page = $this->get_entries_per_page();
foreach ( $this->providers as $provider ) { $links = array_merge( $links, $provider->get_index_links( $entries_per_page ) ); }
if ( empty( $links ) ) { $this->bad_sitemap = true; $this->sitemap = '';
return; }
$this->sitemap = $this->renderer->get_index( $links ); }
/** * Spits out the XSL for the XML sitemap. * * @param string $type Type to output. * * @since 1.4.13 */ public function xsl_output( $type ) {
if ( $type !== 'main' ) {
/** * Fires for the output of XSL for XML sitemaps, other than type "main". */ do_action( 'wpseo_xsl_' . $type );
return; }
header( $this->http_protocol . ' 200 OK', true, 200 ); // Prevent the search engines from indexing the XML Sitemap. header( 'X-Robots-Tag: noindex, follow', true ); header( 'Content-Type: text/xml' );
// Make the browser cache this file properly. $expires = YEAR_IN_SECONDS; header( 'Pragma: public' ); header( 'Cache-Control: maxage=' . $expires ); header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', ( time() + $expires ) ) . ' GMT' );
readfile( WPSEO_PATH . 'css/main-sitemap.xsl' ); }
/** * Spit out the generated sitemap and relevant headers and encoding information. */ public function output() {
if ( ! headers_sent() ) { header( $this->http_protocol . ' 200 OK', true, 200 ); // Prevent the search engines from indexing the XML Sitemap. header( 'X-Robots-Tag: noindex, follow', true ); header( 'Content-Type: text/xml; charset=' . esc_attr( $this->renderer->get_output_charset() ) ); }
echo $this->renderer->get_output( $this->sitemap, $this->transient ); }
/** * Makes a request to the sitemap index to cache it before the arrival of the search engines. * * @return void */ public function hit_sitemap_index() { if ( ! $this->cache->is_enabled() ) { return; }
wp_remote_get( WPSEO_Sitemaps_Router::get_base_url( 'sitemap_index.xml' ) ); }
/** * Get the GMT modification date for the last modified post in the post type. * * @since 3.2 * * @param string|array $post_types Post type or array of types. * @param bool $return_all Flag to return array of values. * * @return string|array|false */ public static function get_last_modified_gmt( $post_types, $return_all = false ) {
global $wpdb;
static $post_type_dates = null;
if ( ! is_array( $post_types ) ) { $post_types = array( $post_types ); }
foreach ( $post_types as $post_type ) { if ( ! isset( $post_type_dates[ $post_type ] ) ) { // If we hadn't seen post type before. R. $post_type_dates = null; break; } }
if ( is_null( $post_type_dates ) ) {
$post_type_dates = array();
// Consider using WPSEO_Post_Type::get_accessible_post_types() to filter out any `no-index` post-types. $post_type_names = get_post_types( array( 'public' => true ) );
if ( ! empty( $post_type_names ) ) { $post_statuses = array_map( 'esc_sql', self::get_post_statuses() );
$sql = " SELECT post_type, MAX(post_modified_gmt) AS date FROM $wpdb->posts WHERE post_status IN ('" . implode( "','", $post_statuses ) . "') AND post_type IN ('" . implode( "','", $post_type_names ) . "') GROUP BY post_type ORDER BY post_modified_gmt DESC ";
foreach ( $wpdb->get_results( $sql ) as $obj ) { $post_type_dates[ $obj->post_type ] = $obj->date; } } }
$dates = array_intersect_key( $post_type_dates, array_flip( $post_types ) );
if ( count( $dates ) > 0 ) { if ( $return_all ) { return $dates; }
return max( $dates ); }
return false; }
/** * Get the modification date for the last modified post in the post type. * * @param array $post_types Post types to get the last modification date for. * * @return string */ public function get_last_modified( $post_types ) {
return $this->timezone->format_date( self::get_last_modified_gmt( $post_types ) ); }
/** * Notify search engines of the updated sitemap. * * @param string|null $url Optional URL to make the ping for. */ public static function ping_search_engines( $url = null ) {
/** * Filter: 'wpseo_allow_xml_sitemap_ping' - Check if pinging is not allowed (allowed by default) * * @api boolean $allow_ping The boolean that is set to true by default. */ if ( apply_filters( 'wpseo_allow_xml_sitemap_ping', true ) === false ) { return; }
if ( '0' === get_option( 'blog_public' ) ) { // Don't ping if blog is not public. return; }
if ( empty( $url ) ) { $url = urlencode( WPSEO_Sitemaps_Router::get_base_url( 'sitemap_index.xml' ) ); }
// Ping Google and Bing. wp_remote_get( 'http://www.google.com/webmasters/tools/ping?sitemap=' . $url, array( 'blocking' => false ) ); wp_remote_get( 'http://www.bing.com/ping?sitemap=' . $url, array( 'blocking' => false ) ); }
/** * Get the maximum number of entries per XML sitemap. * * @return int The maximum number of entries. */ protected function get_entries_per_page() { /** * Filter the maximum number of entries per XML sitemap. * * After changing the output of the filter, make sure that you disable and enable the * sitemaps to make sure the value is picked up for the sitemap cache. * * @param int $entries The maximum number of entries per XML sitemap. */ $entries = (int) apply_filters( 'wpseo_sitemap_entries_per_page', 1000 );
return $entries; }
/** * Get post statuses for post_type or the root sitemap. * * @param string $type Provide a type for a post_type sitemap, SITEMAP_INDEX_TYPE for the root sitemap. * * @since 10.2 * * @return array List of post statuses. */ public static function get_post_statuses( $type = self::SITEMAP_INDEX_TYPE ) { /** * Filter post status list for sitemap query for the post type. * * @param array $post_statuses Post status list, defaults to array( 'publish' ). * @param string $type Post type or SITEMAP_INDEX_TYPE. */ $post_statuses = apply_filters( 'wpseo_sitemap_post_statuses', array( 'publish' ), $type );
if ( ! is_array( $post_statuses ) || empty( $post_statuses ) ) { $post_statuses = array( 'publish' ); }
if ( ( $type === self::SITEMAP_INDEX_TYPE || $type === 'attachment' ) && ! in_array( 'inherit', $post_statuses, true ) ) { $post_statuses[] = 'inherit'; }
return $post_statuses; } }
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