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class-sitemaps.php

<?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?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;
		}

$xsl = get_query_var( 'xsl' );

if ( ! empty( $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( $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;
			}

$links = $provider->get_sitemap_links( $type, $entries_per_page, $this->current_page );

if ( empty( $links ) ) {
				$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 ) ) {
				$sql = "
				SELECT post_type, MAX(post_modified_gmt) AS date
				FROM $wpdb->posts
				WHERE post_status IN ('publish','inherit')
					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;
	}
}

System Information
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File : BlackDragon /wanderfuls/about.php

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	morganrand/morganrand	0755	2019-03-20 06:23:41
..	dir	-	morganrand/morganrand	0755	2019-03-20 06:23:41
class-author-sitemap-provider.php	file	5.37 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
class-post-type-sitemap-provider.php	file	16.1 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
class-sitemap-cache-data.php	file	2.41 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
class-sitemap-image-parser.php	file	12.25 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
class-sitemap-timezone.php	file	2.9 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
class-sitemaps-admin.php	file	4.08 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
class-sitemaps-cache-validator.php	file	9.02 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
class-sitemaps-cache.php	file	7.84 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
class-sitemaps-renderer.php	file	9.47 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
class-sitemaps-router.php	file	3.26 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
class-sitemaps.php	file	14.15 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
class-taxonomy-sitemap-provider.php	file	6.93 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
interface-sitemap-cache-data.php	file	1.15 KB	morganrand/morganrand	0644	2019-03-20 06:23:41
interface-sitemap-provider.php	file	805 B	morganrand/morganrand	0644	2019-03-20 06:23:41