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Ticket #40647: 40647.3.diff

File 40647.3.diff, 95.8 KB (added by flixos90, 6 years ago)

src/wp-includes/ms-blogs.php

  * @since MU (3.0.0)
  */
+require_once( ABSPATH . WPINC . '/ms-site.php' );
+require_once( ABSPATH . WPINC . '/ms-network.php' );
 /**
  * Update the last_updated field for the current site.
+ *
 …
         if ( ! $get_all ) {
                 wp_cache_set( $blog_id . $all, $details, 'blog-details' );
+                return $details;
+        }
+        switch_to_blog( $blog_id );
+        $details->blogname   = get_option( 'blogname' );
+        $details->siteurl    = get_option( 'siteurl' );
+        $details->post_count = get_option( 'post_count' );
+        $details->home       = get_option( 'home' );
+        restore_current_blog();
+        /**
+         * Filters a blog's details.
+         *
+         * @since MU (3.0.0)
+         * @deprecated 4.7.0 Use site_details
+         *
+         * @param object $details The blog details.
+         */
+        $details = apply_filters_deprecated( 'blog_details', array( $details ), '4.7.0', 'site_details' );
+        wp_cache_set( $blog_id . $all, $details, 'blog-details' );
+        $key = md5( $details->domain . $details->path );
+        wp_cache_set( $key, $details, 'blog-lookup' );
+        return $details;
+}
+/**
+ * Clear the blog details cache.
+ *
+ * @since MU (3.0.0)
+ *
+ * @param int $blog_id Optional. Blog ID. Defaults to current blog.
+ */
+function refresh_blog_details( $blog_id = 0 ) {
+        $blog_id = (int) $blog_id;
+        if ( ! $blog_id ) {
+                $blog_id = get_current_blog_id();
+        }
+        clean_blog_cache( $blog_id );
+}
+/**
+ * Update the details for a blog. Updates the blogs table for a given blog id.
+ *
+ * @since MU (3.0.0)
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int   $blog_id Blog ID
+ * @param array $details Array of details keyed by blogs table field names.
+ * @return bool True if update succeeds, false otherwise.
+ */
+function update_blog_details( $blog_id, $details = array() ) {
+        global $wpdb;
+        if ( empty( $details ) ) {
+                return false;
+        }
+        if ( is_object( $details ) ) {
+                $details = get_object_vars( $details );
+        }
+        $site = wp_update_site( $blog_id, $details );
+        if ( is_wp_error( $site ) ) {
+                return false;
+        }
+        return true;
+}
+/**
+ * Clean the blog cache
+ *
+ * @since 3.5.0
+ *
+ * @global bool $_wp_suspend_cache_invalidation
+ *
+ * @param WP_Site|int $blog The site object or ID to be cleared from cache.
+ */
+function clean_blog_cache( $blog ) {
+        global $_wp_suspend_cache_invalidation;
+        if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
+                return;
+        }
+        if ( empty( $blog ) ) {
+                return;
+        }
+        $blog_id = $blog;
+        $blog    = get_site( $blog_id );
+        if ( ! $blog ) {
+                if ( ! is_numeric( $blog_id ) ) {
+                        return;
+                }
+                // Make sure a WP_Site object exists even when the site has been deleted.
+                $blog = new WP_Site(
+                        (object) array(
+                                'blog_id' => $blog_id,
+                                'domain'  => null,
+                                'path'    => null,
+                        )
+                );
+        }
+        $blog_id         = $blog->blog_id;
+        $domain_path_key = md5( $blog->domain . $blog->path );
+        wp_cache_delete( $blog_id, 'sites' );
+        wp_cache_delete( $blog_id, 'site-details' );
+        wp_cache_delete( $blog_id, 'blog-details' );
+        wp_cache_delete( $blog_id . 'short', 'blog-details' );
+        wp_cache_delete( $domain_path_key, 'blog-lookup' );
+        wp_cache_delete( $domain_path_key, 'blog-id-cache' );
+        wp_cache_delete( 'current_blog_' . $blog->domain, 'site-options' );
+        wp_cache_delete( 'current_blog_' . $blog->domain . $blog->path, 'site-options' );
+        wp_cache_delete( $blog_id, 'blog_meta' );
+        /**
+         * Fires immediately after a site has been removed from the object cache.
+         *
+         * @since 4.6.0
+         *
+         * @param int     $id              Blog ID.
+         * @param WP_Site $blog            Site object.
+         * @param string  $domain_path_key md5 hash of domain and path.
+         */
+        do_action( 'clean_site_cache', $blog_id, $blog, $domain_path_key );
+        wp_cache_set( 'last_changed', microtime(), 'sites' );
+        /**
+         * Fires after the blog details cache is cleared.
+         *
+         * @since 3.4.0
+         * @deprecated 4.9.0 Use clean_site_cache
+         *
+         * @param int $blog_id Blog ID.
+         */
+        do_action_deprecated( 'refresh_blog_details', array( $blog_id ), '4.9.0', 'clean_site_cache' );
+}
+/**
+ * Cleans the site details cache for a site.
+ *
+ * @since 4.7.4
+ *
+ * @param int $site_id Optional. Site ID. Default is the current site ID.
+ */
+function clean_site_details_cache( $site_id = 0 ) {
+        $site_id = (int) $site_id;
+        if ( ! $site_id ) {
+                $site_id = get_current_blog_id();
+        }
+        wp_cache_delete( $site_id, 'site-details' );
+        wp_cache_delete( $site_id, 'blog-details' );
+}
+/**
+ * Inserts a new site into the database.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param array $data {
+ *     Data for the new site that should be inserted.
+ *
+ *     @type string $domain       Site domain. Default empty string.
+ *     @type string $path         Site path. Default '/'.
+ *     @type int    $network_id   The site's network ID. Default is the current network ID.
+ *     @type string $registered   When the site was registered, in SQL datetime format. Default is
+ *                                the current time.
+ *     @type string $last_updated When the site was last updated, in SQL datetime format. Default is
+ *                                the value of $registered.
+ *     @type int    $public       Whether the site is public. Default 1.
+ *     @type int    $archived     Whether the site is archived. Default 0.
+ *     @type int    $mature       Whether the site is mature. Default 0.
+ *     @type int    $spam         Whether the site is spam. Default 0.
+ *     @type int    $deleted      Whether the site is deleted. Default 0.
+ *     @type int    $lang_id      The site's language ID. Currently unused. Default 0.
+ * }
+ * @return int|WP_Error The new site's ID on success, or error object on failure.
+ */
+function wp_insert_site( array $data ) {
+        global $wpdb;
+        $now = current_time( 'mysql', true );
+        $defaults = array(
+                'domain'       => '',
+                'path'         => '/',
+                'network_id'   => get_current_network_id(),
+                'registered'   => $now,
+                'last_updated' => $now,
+                'public'       => 1,
+                'archived'     => 0,
+                'mature'       => 0,
+                'spam'         => 0,
+                'deleted'      => 0,
+                'lang_id'      => 0,
+        );
+        // Extract the passed arguments that may be relevant for site initialization.
+        $args = array_diff_key( $data, $defaults );
+        if ( isset( $args['site_id'] ) ) {
+                unset( $args['site_id'] );
+        }
+        $data = wp_prepare_site_data( $data, $defaults );
+        if ( is_wp_error( $data ) ) {
+                return $data;
+        }
+        if ( false === $wpdb->insert( $wpdb->blogs, $data ) ) {
+                return new WP_Error( 'db_insert_error', __( 'Could not insert site into the database.' ), $wpdb->last_error );
+        }
+        $new_site = get_site( $wpdb->insert_id );
+        clean_blog_cache( $new_site );
+        /**
+         * Fires once a site has been inserted into the database.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Site $new_site New site object.
+         */
+        do_action( 'wp_insert_site', $new_site );
+        /**
+         * Fires when a site's initialization routine should be executed.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Site $new_site New site object.
+         * @param array   $args     Arguments for the initialization.
+         */
+        do_action( 'wp_initialize_site', $new_site, $args );
+        // Only compute extra hook parameters if the deprecated hook is actually in use.
+        if ( has_action( 'wpmu_new_blog' ) ) {
+                $user_id = ! empty( $args['user_id'] ) ? $args['user_id'] : 0;
+                $meta    = ! empty( $args['options'] ) ? $args['options'] : array();
+                /**
+                 * Fires immediately after a new site is created.
+                 *
+                 * @since MU (3.0.0)
+                 * @deprecated 5.1.0 Use wp_insert_site
+                 *
+                 * @param int    $site_id    Site ID.
+                 * @param int    $user_id    User ID.
+                 * @param string $domain     Site domain.
+                 * @param string $path       Site path.
+                 * @param int    $network_id Network ID. Only relevant on multi-network installations.
+                 * @param array  $meta       Meta data. Used to set initial site options.
+                 */
+                do_action_deprecated( 'wpmu_new_blog', array( $new_site->id, $user_id, $new_site->domain, $new_site->path, $new_site->network_id, $meta ), '5.1.0', 'wp_insert_site' );
+        }
+        return (int) $new_site->id;
+}
+/**
+ * Updates a site in the database.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int   $site_id ID of the site that should be updated.
+ * @param array $data    Site data to update. See {@see wp_insert_site()} for the list of supported keys.
+ * @return int|WP_Error The updated site's ID on success, or error object on failure.
+ */
+function wp_update_site( $site_id, array $data ) {
+        global $wpdb;
+        if ( empty( $site_id ) ) {
+                return new WP_Error( 'site_empty_id', __( 'Site ID must not be empty.' ) );
+        }
+        $old_site = get_site( $site_id );
+        if ( ! $old_site ) {
+                return new WP_Error( 'site_not_exist', __( 'Site does not exist.' ) );
+        }
+        $defaults                 = $old_site->to_array();
+        $defaults['network_id']   = (int) $defaults['site_id'];
+        $defaults['last_updated'] = current_time( 'mysql', true );
+        unset( $defaults['blog_id'], $defaults['site_id'] );
+        $data = wp_prepare_site_data( $data, $defaults, $old_site );
+        if ( is_wp_error( $data ) ) {
+                return $data;
+        }
+        if ( false === $wpdb->update( $wpdb->blogs, $data, array( 'blog_id' => $old_site->id ) ) ) {
+                return new WP_Error( 'db_update_error', __( 'Could not update site in the database.' ), $wpdb->last_error );
+        }
+        clean_blog_cache( $old_site );
+        $new_site = get_site( $old_site->id );
+        /**
+         * Fires once a site has been updated in the database.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Site $new_site New site object.
+         * @param WP_Site $old_site Old site object.
+         */
+        do_action( 'wp_update_site', $new_site, $old_site );
+        return (int) $new_site->id;
+}
+/**
+ * Deletes a site from the database.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int $site_id ID of the site that should be deleted.
+ * @return WP_Site|WP_Error The deleted site object on success, or error object on failure.
+ */
+function wp_delete_site( $site_id ) {
+        global $wpdb;
+        if ( empty( $site_id ) ) {
+                return new WP_Error( 'site_empty_id', __( 'Site ID must not be empty.' ) );
+        }
+        $old_site = get_site( $site_id );
+        if ( ! $old_site ) {
+                return new WP_Error( 'site_not_exist', __( 'Site does not exist.' ) );
+        }
+        $errors = new WP_Error();
+        /**
+         * Fires before a site should be deleted from the database.
+         *
+         * Plugins should amend the `$errors` object via its `WP_Error::add()` method. If any errors
+         * are present, the site will not be deleted.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Error $errors   Error object to add validation errors to.
+         * @param WP_Site  $old_site The site object to be deleted.
+         */
+        do_action( 'wp_validate_site_deletion', $errors, $old_site );
+        if ( ! empty( $errors->errors ) ) {
+                return $errors;
+        }
+        /**
+         * Fires before a site is deleted.
+         *
+         * @since MU (3.0.0)
+         * @deprecated 5.1.0
+         *
+         * @param int  $site_id The site ID.
+         * @param bool $drop    True if site's table should be dropped. Default is false.
+         */
+        do_action_deprecated( 'delete_blog', array( $old_site->id, true ), '5.1.0' );
+        /**
+         * Fires when a site's uninitialization routine should be executed.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Site $old_site Deleted site object.
+         */
+        do_action( 'wp_uninitialize_site', $old_site );
+        if ( is_site_meta_supported() ) {
+                $blog_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->blogmeta WHERE blog_id = %d ", $old_site->id ) );
+                foreach ( $blog_meta_ids as $mid ) {
+                        delete_metadata_by_mid( 'blog', $mid );
+                }
+        }
+        if ( false === $wpdb->delete( $wpdb->blogs, array( 'blog_id' => $old_site->id ) ) ) {
+                return new WP_Error( 'db_delete_error', __( 'Could not delete site from the database.' ), $wpdb->last_error );
+        }
+        clean_blog_cache( $old_site );
+        /**
+         * Fires once a site has been deleted from the database.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Site $old_site Deleted site object.
+         */
+        do_action( 'wp_delete_site', $old_site );
+        /**
+         * Fires after the site is deleted from the network.
+         *
+         * @since 4.8.0
+         * @deprecated 5.1.0
+         *
+         * @param int  $site_id The site ID.
+         * @param bool $drop    True if site's tables should be dropped. Default is false.
+         */
+        do_action_deprecated( 'deleted_blog', array( $old_site->id, true ), '5.1.0' );
+        return $old_site;
+}
+/**
+ * Retrieves site data given a site ID or site object.
+ *
+ * Site data will be cached and returned after being passed through a filter.
+ * If the provided site is empty, the current site global will be used.
+ *
+ * @since 4.6.0
+ *
+ * @param WP_Site|int|null $site Optional. Site to retrieve. Default is the current site.
+ * @return WP_Site|null The site object or null if not found.
+ */
+function get_site( $site = null ) {
+        if ( empty( $site ) ) {
+                $site = get_current_blog_id();
+        }
+        if ( $site instanceof WP_Site ) {
+                $_site = $site;
+        } elseif ( is_object( $site ) ) {
+                $_site = new WP_Site( $site );
+        } else {
+                $_site = WP_Site::get_instance( $site );
+        }
+        if ( ! $_site ) {
+                return null;
+        }
+        /**
+         * Fires after a site is retrieved.
+         *
+         * @since 4.6.0
+         *
+         * @param WP_Site $_site Site data.
+         */
+        $_site = apply_filters( 'get_site', $_site );
+        return $_site;
+}
+/**
+ * Adds any sites from the given ids to the cache that do not already exist in cache.
+ *
+ * @since 4.6.0
+ * @since 5.1.0 Introduced the `$update_meta_cache` parameter.
+ * @access private
+ *
+ * @see update_site_cache()
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param array $ids               ID list.
+ * @param bool  $update_meta_cache Optional. Whether to update the meta cache. Default true.
+ */
+function _prime_site_caches( $ids, $update_meta_cache = true ) {
+        global $wpdb;
+        $non_cached_ids = _get_non_cached_ids( $ids, 'sites' );
+        if ( ! empty( $non_cached_ids ) ) {
+                $fresh_sites = $wpdb->get_results( sprintf( "SELECT * FROM $wpdb->blogs WHERE blog_id IN (%s)", join( ',', array_map( 'intval', $non_cached_ids ) ) ) ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+                update_site_cache( $fresh_sites, $update_meta_cache );
+        }
+}
+/**
+ * Updates sites in cache.
+ *
+ * @since 4.6.0
+ * @since 5.1.0 Introduced the `$update_meta_cache` parameter.
+ *
+ * @param array $sites             Array of site objects.
+ * @param bool  $update_meta_cache Whether to update site meta cache. Default true.
+ */
+function update_site_cache( $sites, $update_meta_cache = true ) {
+        if ( ! $sites ) {
+                return;
+        }
+        $site_ids = array();
+        foreach ( $sites as $site ) {
+                $site_ids[] = $site->blog_id;
+                wp_cache_add( $site->blog_id, $site, 'sites' );
+                wp_cache_add( $site->blog_id . 'short', $site, 'blog-details' );
+        }
+        if ( $update_meta_cache ) {
+                update_sitemeta_cache( $site_ids );
+        }
+}
+/**
+ * Updates metadata cache for list of site IDs.
+ *
+ * Performs SQL query to retrieve all metadata for the sites matching `$site_ids` and stores them in the cache.
+ * Subsequent calls to `get_site_meta()` will not need to query the database.
+ *
+ * @since 5.1.0
+ *
+ * @param array $site_ids List of site IDs.
+ * @return array|false Returns false if there is nothing to update. Returns an array of metadata on success.
+ */
+function update_sitemeta_cache( $site_ids ) {
+        return update_meta_cache( 'blog', $site_ids );
+}
+/**
+ * Retrieves a list of sites matching requested arguments.
+ *
+ * @since 4.6.0
+ * @since 4.8.0 Introduced the 'lang_id', 'lang__in', and 'lang__not_in' parameters.
+ *
+ * @see WP_Site_Query::parse_query()
+ *
+ * @param string|array $args {
+ *     Optional. Array or query string of site query parameters. Default empty.
+ *
+ *     @type array        $site__in          Array of site IDs to include. Default empty.
+ *     @type array        $site__not_in      Array of site IDs to exclude. Default empty.
+ *     @type bool         $count             Whether to return a site count (true) or array of site objects.
+ *                                           Default false.
+ *     @type array        $date_query        Date query clauses to limit sites by. See WP_Date_Query.
+ *                                           Default null.
+ *     @type string       $fields            Site fields to return. Accepts 'ids' (returns an array of site IDs)
+ *                                           or empty (returns an array of complete site objects). Default empty.
+ *     @type int          $ID                A site ID to only return that site. Default empty.
+ *     @type int          $number            Maximum number of sites to retrieve. Default 100.
+ *     @type int          $offset            Number of sites to offset the query. Used to build LIMIT clause.
+ *                                           Default 0.
+ *     @type bool         $no_found_rows     Whether to disable the `SQL_CALC_FOUND_ROWS` query. Default true.
+ *     @type string|array $orderby           Site status or array of statuses. Accepts 'id', 'domain', 'path',
+ *                                           'network_id', 'last_updated', 'registered', 'domain_length',
+ *                                           'path_length', 'site__in' and 'network__in'. Also accepts false,
+ *                                           an empty array, or 'none' to disable `ORDER BY` clause.
+ *                                           Default 'id'.
+ *     @type string       $order             How to order retrieved sites. Accepts 'ASC', 'DESC'. Default 'ASC'.
+ *     @type int          $network_id        Limit results to those affiliated with a given network ID. If 0,
+ *                                           include all networks. Default 0.
+ *     @type array        $network__in       Array of network IDs to include affiliated sites for. Default empty.
+ *     @type array        $network__not_in   Array of network IDs to exclude affiliated sites for. Default empty.
+ *     @type string       $domain            Limit results to those affiliated with a given domain. Default empty.
+ *     @type array        $domain__in        Array of domains to include affiliated sites for. Default empty.
+ *     @type array        $domain__not_in    Array of domains to exclude affiliated sites for. Default empty.
+ *     @type string       $path              Limit results to those affiliated with a given path. Default empty.
+ *     @type array        $path__in          Array of paths to include affiliated sites for. Default empty.
+ *     @type array        $path__not_in      Array of paths to exclude affiliated sites for. Default empty.
+ *     @type int          $public            Limit results to public sites. Accepts '1' or '0'. Default empty.
+ *     @type int          $archived          Limit results to archived sites. Accepts '1' or '0'. Default empty.
+ *     @type int          $mature            Limit results to mature sites. Accepts '1' or '0'. Default empty.
+ *     @type int          $spam              Limit results to spam sites. Accepts '1' or '0'. Default empty.
+ *     @type int          $deleted           Limit results to deleted sites. Accepts '1' or '0'. Default empty.
+ *     @type int          $lang_id           Limit results to a language ID. Default empty.
+ *     @type array        $lang__in          Array of language IDs to include affiliated sites for. Default empty.
+ *     @type array        $lang__not_in      Array of language IDs to exclude affiliated sites for. Default empty.
+ *     @type string       $search            Search term(s) to retrieve matching sites for. Default empty.
+ *     @type array        $search_columns    Array of column names to be searched. Accepts 'domain' and 'path'.
+ *                                           Default empty array.
+ *     @type bool         $update_site_cache Whether to prime the cache for found sites. Default true.
+ * }
+ * @return array|int List of WP_Site objects, a list of site ids when 'fields' is set to 'ids',
+ *                   or the number of sites when 'count' is passed as a query var.
+ */
+function get_sites( $args = array() ) {
+        $query = new WP_Site_Query();
+        return $query->query( $args );
+}
+/**
+ * Prepares site data for insertion or update in the database.
+ *
+ * @since 5.1.0
+ *
+ * @param array        $data     Associative array of site data passed to the respective function.
+ *                               See {@see wp_insert_site()} for the possibly included data.
+ * @param array        $defaults Site data defaults to parse $data against.
+ * @param WP_Site|null $old_site Optional. Old site object if an update, or null if an insertion.
+ *                               Default null.
+ * @return array|WP_Error Site data ready for a database transaction, or WP_Error in case a validation
+ *                        error occurred.
+ */
+function wp_prepare_site_data( $data, $defaults, $old_site = null ) {
+        // Maintain backward-compatibility with `$site_id` as network ID.
+        if ( isset( $data['site_id'] ) ) {
+                if ( ! empty( $data['site_id'] ) && empty( $data['network_id'] ) ) {
+                        $data['network_id'] = $data['site_id'];
+                }
+                unset( $data['site_id'] );
+        }
+        /**
+         * Filters passed site data in order to normalize it.
+         *
+         * @since 5.1.0
+         *
+         * @param array $data Associative array of site data passed to the respective function.
+         *                    See {@see wp_insert_site()} for the possibly included data.
+         */
+        $data = apply_filters( 'wp_normalize_site_data', $data );
+        $whitelist = array( 'domain', 'path', 'network_id', 'registered', 'last_updated', 'public', 'archived', 'mature', 'spam', 'deleted', 'lang_id' );
+        $data      = array_intersect_key( wp_parse_args( $data, $defaults ), array_flip( $whitelist ) );
+        $errors = new WP_Error();
+        /**
+         * Fires when data should be validated for a site prior to inserting or updating in the database.
+         *
+         * Plugins should amend the `$errors` object via its `WP_Error::add()` method.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Error     $errors   Error object to add validation errors to.
+         * @param array        $data     Associative array of complete site data. See {@see wp_insert_site()}
+         *                               for the included data.
+         * @param WP_Site|null $old_site The old site object if the data belongs to a site being updated,
+         *                               or null if it is a new site being inserted.
+         */
+        do_action( 'wp_validate_site_data', $errors, $data, $old_site );
+        if ( ! empty( $errors->errors ) ) {
+                return $errors;
+        }
+        // Prepare for database.
+        $data['site_id'] = $data['network_id'];
+        unset( $data['network_id'] );
+        return $data;
+}
+/**
+ * Normalizes data for a site prior to inserting or updating in the database.
+ *
+ * @since 5.1.0
+ *
+ * @param array $data Associative array of site data passed to the respective function.
+ *                    See {@see wp_insert_site()} for the possibly included data.
+ * @return array Normalized site data.
+ */
+function wp_normalize_site_data( $data ) {
+        // Sanitize domain if passed.
+        if ( array_key_exists( 'domain', $data ) ) {
+                $data['domain'] = trim( $data['domain'] );
+                $data['domain'] = preg_replace( '/\s+/', '', sanitize_user( $data['domain'], true ) );
+                if ( is_subdomain_install() ) {
+                        $data['domain'] = str_replace( '@', '', $data['domain'] );
+                }
+        }
+        // Sanitize path if passed.
+        if ( array_key_exists( 'path', $data ) ) {
+                $data['path'] = trailingslashit( '/' . trim( $data['path'], '/' ) );
+        }
+        // Sanitize network ID if passed.
+        if ( array_key_exists( 'network_id', $data ) ) {
+                $data['network_id'] = (int) $data['network_id'];
+        }
+        // Sanitize status fields if passed.
+        $status_fields = array( 'public', 'archived', 'mature', 'spam', 'deleted' );
+        foreach ( $status_fields as $status_field ) {
+                if ( array_key_exists( $status_field, $data ) ) {
+                        $data[ $status_field ] = (int) $data[ $status_field ];
+                }
+        }
+        // Strip date fields if empty.
+        $date_fields = array( 'registered', 'last_updated' );
+        foreach ( $date_fields as $date_field ) {
+                if ( ! array_key_exists( $date_field, $data ) ) {
+                        continue;
+                }
+                if ( empty( $data[ $date_field ] ) || '0000-00-00 00:00:00' === $data[ $date_field ] ) {
+                        unset( $data[ $date_field ] );
+                }
+        }
+        return $data;
+}
+/**
+ * Validates data for a site prior to inserting or updating in the database.
+ *
+ * @since 5.1.0
+ *
+ * @param WP_Error     $errors   Error object, passed by reference. Will contain validation errors if
+ *                               any occurred.
+ * @param array        $data     Associative array of complete site data. See {@see wp_insert_site()}
+ *                               for the included data.
+ * @param WP_Site|null $old_site The old site object if the data belongs to a site being updated,
+ *                               or null if it is a new site being inserted.
+ */
+function wp_validate_site_data( $errors, $data, $old_site = null ) {
+        // A domain must always be present.
+        if ( empty( $data['domain'] ) ) {
+                $errors->add( 'site_empty_domain', __( 'Site domain must not be empty.' ) );
+        }
+        // A path must always be present.
+        if ( empty( $data['path'] ) ) {
+                $errors->add( 'site_empty_path', __( 'Site path must not be empty.' ) );
+        }
+        // A network ID must always be present.
+        if ( empty( $data['network_id'] ) ) {
+                $errors->add( 'site_empty_network_id', __( 'Site network ID must be provided.' ) );
+        }
+        // Both registration and last updated dates must always be present and valid.
+        $date_fields = array( 'registered', 'last_updated' );
+        foreach ( $date_fields as $date_field ) {
+                if ( empty( $data[ $date_field ] ) ) {
+                        $errors->add( 'site_empty_' . $date_field, __( 'Both registration and last updated dates must be provided.' ) );
+                        break;
+                }
+                // Allow '0000-00-00 00:00:00', although it be stripped out at this point.
+                if ( '0000-00-00 00:00:00' !== $data[ $date_field ] ) {
+                        $month      = substr( $data[ $date_field ], 5, 2 );
+                        $day        = substr( $data[ $date_field ], 8, 2 );
+                        $year       = substr( $data[ $date_field ], 0, 4 );
+                        $valid_date = wp_checkdate( $month, $day, $year, $data[ $date_field ] );
+                        if ( ! $valid_date ) {
+                                $errors->add( 'site_invalid_' . $date_field, __( 'Both registration and last updated dates must be valid dates.' ) );
+                                break;
+                        }
+                }
+        }
+        if ( ! empty( $errors->errors ) ) {
+                return;
+        }
+        // If a new site, or domain/path/network ID have changed, ensure uniqueness.
+        if ( ! $old_site
+                || $data['domain'] !== $old_site->domain
+                || $data['path'] !== $old_site->path
+                || $data['network_id'] !== $old_site->network_id
+        ) {
+                if ( domain_exists( $data['domain'], $data['path'], $data['network_id'] ) ) {
+                        $errors->add( 'site_taken', __( 'Sorry, that site already exists!' ) );
+                }
+        }
+}
+/**
+ * Runs the initialization routine for a given site.
+ *
+ * This process includes creating the site's database tables and
+ * populating them with defaults.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb     $wpdb     WordPress database abstraction object.
+ * @global WP_Roles $wp_roles WordPress role management object.
+ *
+ * @param int|WP_Site $site_id Site ID or object.
+ * @param array       $args    {
+ *     Optional. Arguments to modify the initialization behavior.
+ *
+ *     @type int    $user_id Required. User ID for the site administrator.
+ *     @type string $title   Site title. Default is 'Site %d' where %d is the
+ *                           site ID.
+ *     @type array  $options Custom option $key => $value pairs to use. Default
+ *                           empty array.
+ *     @type array  $meta    Custom site metadata $key => $value pairs to use.
+ *                           Default empty array.
+ * }
+ * @return bool|WP_Error True on success, or error object on failure.
+ */
+function wp_initialize_site( $site_id, array $args = array() ) {
+        global $wpdb, $wp_roles;
+        if ( empty( $site_id ) ) {
+                return new WP_Error( 'site_empty_id', __( 'Site ID must not be empty.' ) );
+        }
+        $site = get_site( $site_id );
+        if ( ! $site ) {
+                return new WP_Error( 'site_invalid_id', __( 'Site with the ID does not exist.' ) );
+        }
+        if ( wp_is_site_initialized( $site ) ) {
+                return new WP_Error( 'site_already_initialized', __( 'The site appears to be already initialized.' ) );
+        }
+        $network = get_network( $site->network_id );
+        if ( ! $network ) {
+                $network = get_network();
+        }
+        $args = wp_parse_args(
+                $args,
+                array(
+                        'user_id' => 0,
+                        /* translators: %d: site ID */
+                        'title'   => sprintf( __( 'Site %d' ), $site->id ),
+                        'options' => array(),
+                        'meta'    => array(),
+                )
+        );
+        /**
+         * Filters the arguments for initializing a site.
+         *
+         * @since 5.1.0
+         *
+         * @param array      $args    Arguments to modify the initialization behavior.
+         * @param WP_Site    $site    Site that is being initialized.
+         * @param WP_Network $network Network that the site belongs to.
+         */
+        $args = apply_filters( 'wp_initialize_site_args', $args, $site, $network );
+        $orig_installing = wp_installing();
+        if ( ! $orig_installing ) {
+                wp_installing( true );
+        }
+        $switch = false;
+        if ( get_current_blog_id() !== $site->id ) {
+                $switch = true;
+                switch_to_blog( $site->id );
+        }
+        require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );
+        // Set up the database tables.
+        make_db_current_silent( 'blog' );
+        $home_scheme    = 'http';
+        $siteurl_scheme = 'http';
+        if ( ! is_subdomain_install() ) {
+                if ( 'https' === parse_url( get_home_url( $network->site_id ), PHP_URL_SCHEME ) ) {
+                        $home_scheme = 'https';
+                }
+                if ( 'https' === parse_url( get_network_option( $network->id, 'siteurl' ), PHP_URL_SCHEME ) ) {
+                        $siteurl_scheme = 'https';
+                }
+        }
+        // Populate the site's options.
+        populate_options(
+                array_merge(
+                        array(
+                                'home'        => untrailingslashit( $home_scheme . '://' . $site->domain . $site->path ),
+                                'siteurl'     => untrailingslashit( $siteurl_scheme . '://' . $site->domain . $site->path ),
+                                'blogname'    => wp_unslash( $args['title'] ),
+                                'admin_email' => '',
+                                'upload_path' => get_network_option( $network->id, 'ms_files_rewriting' ) ? UPLOADBLOGSDIR . "/{$site->id}/files" : get_blog_option( $network->site_id, 'upload_path' ),
+                                'blog_public' => (int) $site->public,
+                                'WPLANG'      => get_network_option( $network->id, 'WPLANG' ),
+                        ),
+                        $args['options']
+                )
+        );
+        // Populate the site's roles.
+        populate_roles();
+        $wp_roles = new WP_Roles();
+        // Populate metadata for the site.
+        populate_site_meta( $site->id, $args['meta'] );
+        // Remove all permissions that may exist for the site.
+        $table_prefix = $wpdb->get_blog_prefix();
+        delete_metadata( 'user', 0, $table_prefix . 'user_level', null, true ); // delete all
+        delete_metadata( 'user', 0, $table_prefix . 'capabilities', null, true ); // delete all
+        // Install default site content.
+        wp_install_defaults( $args['user_id'] );
+        // Set the site administrator.
+        add_user_to_blog( $site->id, $args['user_id'], 'administrator' );
+        if ( ! user_can( $args['user_id'], 'manage_network' ) && ! get_user_meta( $args['user_id'], 'primary_blog', true ) ) {
+                update_user_meta( $args['user_id'], 'primary_blog', $site->id );
+        }
+        if ( $switch ) {
+                restore_current_blog();
+        }
+        wp_installing( $orig_installing );
+        return true;
+}
+/**
+ * Runs the uninitialization routine for a given site.
+ *
+ * This process includes dropping the site's database tables and deleting its uploads directory.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int|WP_Site $site_id Site ID or object.
+ * @return bool|WP_Error True on success, or error object on failure.
+ */
+function wp_uninitialize_site( $site_id ) {
+        global $wpdb;
+        if ( empty( $site_id ) ) {
+                return new WP_Error( 'site_empty_id', __( 'Site ID must not be empty.' ) );
+        }
+        $site = get_site( $site_id );
+        if ( ! $site ) {
+                return new WP_Error( 'site_invalid_id', __( 'Site with the ID does not exist.' ) );
+        }
+        if ( ! wp_is_site_initialized( $site ) ) {
+                return new WP_Error( 'site_already_uninitialized', __( 'The site appears to be already uninitialized.' ) );
+        }
+        $users = get_users(
+                array(
+                        'blog_id' => $site->id,
+                        'fields'  => 'ids',
+                )
+        );
+        // Remove users from the site.
+        if ( ! empty( $users ) ) {
+                foreach ( $users as $user_id ) {
+                        remove_user_from_blog( $user_id, $site->id );
+                }
+        }
+        $switch = false;
+        if ( get_current_blog_id() !== $site->id ) {
+                $switch = true;
+                switch_to_blog( $site->id );
+        }
+        $uploads = wp_get_upload_dir();
+        $tables = $wpdb->tables( 'blog' );
+        /**
+         * Filters the tables to drop when the site is deleted.
+         *
+         * @since MU (3.0.0)
+         *
+         * @param string[] $tables  Array of names of the site tables to be dropped.
+         * @param int      $site_id The ID of the site to drop tables for.
+         */
+        $drop_tables = apply_filters( 'wpmu_drop_tables', $tables, $site->id );
+        foreach ( (array) $drop_tables as $table ) {
+                $wpdb->query( "DROP TABLE IF EXISTS `$table`" ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+                return $details;
+        }
+        switch_to_blog( $blog_id );
+        $details->blogname   = get_option( 'blogname' );
+        $details->siteurl    = get_option( 'siteurl' );
+        $details->post_count = get_option( 'post_count' );
+        $details->home       = get_option( 'home' );
+        restore_current_blog();
         /**
          * Filters the upload base directory to delete when the site is deleted.
+         * Filters a blog's details.
+         *
          * @since MU (3.0.0)
+         * @deprecated 4.7.0 Use site_details
+         *
+         * @param string $uploads['basedir'] Uploads path without subdirectory. @see wp_upload_dir()
+         * @param int    $site_id            The site ID.
+         * @param object $details The blog details.
          */
+        $dir     = apply_filters( 'wpmu_delete_blog_upload_dir', $uploads['basedir'], $site->id );
+        $dir     = rtrim( $dir, DIRECTORY_SEPARATOR );
+        $top_dir = $dir;
+        $stack   = array( $dir );
+        $index   = 0;
+        while ( $index < count( $stack ) ) {
+                // Get indexed directory from stack
+                $dir = $stack[ $index ];
+                // phpcs:disable WordPress.PHP.NoSilencedErrors.Discouraged
+                $dh = @opendir( $dir );
+                if ( $dh ) {
+                        $file = @readdir( $dh );
+                        while ( false !== $file ) {
+                                if ( '.' === $file || '..' === $file ) {
+                                        $file = @readdir( $dh );
+                                        continue;
+                                }
+        $details = apply_filters_deprecated( 'blog_details', array( $details ), '4.7.0', 'site_details' );
+                                if ( @is_dir( $dir . DIRECTORY_SEPARATOR . $file ) ) {
+                                        $stack[] = $dir . DIRECTORY_SEPARATOR . $file;
+                                } elseif ( @is_file( $dir . DIRECTORY_SEPARATOR . $file ) ) {
+                                        @unlink( $dir . DIRECTORY_SEPARATOR . $file );
+                                }
+        wp_cache_set( $blog_id . $all, $details, 'blog-details' );
+                                $file = @readdir( $dh );
+                        }
+                        @closedir( $dh );
+                }
+                $index++;
+        }
+        $key = md5( $details->domain . $details->path );
+        wp_cache_set( $key, $details, 'blog-lookup' );
+        $stack = array_reverse( $stack ); // Last added dirs are deepest
+        foreach ( (array) $stack as $dir ) {
+                if ( $dir != $top_dir ) {
+                        @rmdir( $dir );
+                }
+        }
+        return $details;
+}
+        // phpcs:enable WordPress.PHP.NoSilencedErrors.Discouraged
+        if ( $switch ) {
+                restore_current_blog();
+/**
+ * Clear the blog details cache.
+ *
+ * @since MU (3.0.0)
+ *
+ * @param int $blog_id Optional. Blog ID. Defaults to current blog.
+ */
+function refresh_blog_details( $blog_id = 0 ) {
+        $blog_id = (int) $blog_id;
+        if ( ! $blog_id ) {
+                $blog_id = get_current_blog_id();
+        }
         return true;
+        clean_blog_cache( $blog_id );
+}
 /**
+ * Checks whether a site is initialized.
+ *
+ * A site is considered initialized when its database tables are present.
+ * Update the details for a blog. Updates the blogs table for a given blog id.
+ *
  * @since 5.1.0
+ * @since MU (3.0.0)
+ *
  * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int|WP_Site $site_id Site ID or object.
+ * @return bool True if the site is initialized, false otherwise.
+ * @param int   $blog_id Blog ID
+ * @param array $details Array of details keyed by blogs table field names.
+ * @return bool True if update succeeds, false otherwise.
  */
 function wp_is_site_initialized( $site_id ) {
+function update_blog_details( $blog_id, $details = array() ) {
         global $wpdb;
         if ( is_object( $site_id ) ) {
                 $site_id = $site_id->blog_id;
+        if ( empty( $details ) ) {
+                return false;
+        }
-        $site_id = (int) $site_id;
+        /**
+         * Filters the check for whether a site is initialized before the database is accessed.
+         *
+         * Returning a non-null value will effectively short-circuit the function, returning
+         * that value instead.
+         *
+         * @since 5.1.0
+         *
+         * @param bool|null $pre     The value to return, if not null.
+         * @param int       $site_id The site ID that is being checked.
+         */
+        $pre = apply_filters( 'pre_wp_is_site_initialized', null, $site_id );
+        if ( null !== $pre ) {
+                return (bool) $pre;
+        if ( is_object( $details ) ) {
+                $details = get_object_vars( $details );
+        }
+        $switch = false;
+        if ( get_current_blog_id() !== $site_id ) {
+                $switch = true;
+                remove_action( 'switch_blog', 'wp_switch_roles_and_user', 1 );
+                switch_to_blog( $site_id );
+        $site = wp_update_site( $blog_id, $details );
+        if ( is_wp_error( $site ) ) {
+                return false;
+        }
+        $suppress = $wpdb->suppress_errors();
+        $result   = (bool) $wpdb->get_results( "DESCRIBE {$wpdb->posts}" );
+        $wpdb->suppress_errors( $suppress );
+        return true;
+}
+        if ( $switch ) {
+                restore_current_blog();
+                add_action( 'switch_blog', 'wp_switch_roles_and_user', 1, 2 );
+/**
+ * Cleans the site details cache for a site.
+ *
+ * @since 4.7.4
+ *
+ * @param int $site_id Optional. Site ID. Default is the current site ID.
+ */
+function clean_site_details_cache( $site_id = 0 ) {
+        $site_id = (int) $site_id;
+        if ( ! $site_id ) {
+                $site_id = get_current_blog_id();
+        }
+        return $result;
+        wp_cache_delete( $site_id, 'site-details' );
+        wp_cache_delete( $site_id, 'blog-details' );
+}
 /**
 …
+}
 /**
- * Adds metadata to a site.
+ *
- * @since 5.1.0
+ *
- * @param int    $site_id    Site ID.
- * @param string $meta_key   Metadata name.
- * @param mixed  $meta_value Metadata value. Must be serializable if non-scalar.
- * @param bool   $unique     Optional. Whether the same key should not be added.
- *                           Default false.
- * @return int|false Meta ID on success, false on failure.
- */
-function add_site_meta( $site_id, $meta_key, $meta_value, $unique = false ) {
-        return add_metadata( 'blog', $site_id, $meta_key, $meta_value, $unique );
+}
-/**
- * Removes metadata matching criteria from a site.
+ *
- * You can match based on the key, or key and value. Removing based on key and
- * value, will keep from removing duplicate metadata with the same key. It also
- * allows removing all metadata matching key, if needed.
+ *
- * @since 5.1.0
+ *
- * @param int    $site_id    Site ID.
- * @param string $meta_key   Metadata name.
- * @param mixed  $meta_value Optional. Metadata value. Must be serializable if
- *                           non-scalar. Default empty.
- * @return bool True on success, false on failure.
- */
-function delete_site_meta( $site_id, $meta_key, $meta_value = '' ) {
-        return delete_metadata( 'blog', $site_id, $meta_key, $meta_value );
+}
-/**
- * Retrieves metadata for a site.
+ *
- * @since 5.1.0
+ *
- * @param int    $site_id Site ID.
- * @param string $key     Optional. The meta key to retrieve. By default, returns
- *                        data for all keys. Default empty.
- * @param bool   $single  Optional. Whether to return a single value. Default false.
- * @return mixed Will be an array if $single is false. Will be value of meta data
- *               field if $single is true.
- */
-function get_site_meta( $site_id, $key = '', $single = false ) {
-        return get_metadata( 'blog', $site_id, $key, $single );
+}
-/**
- * Updates metadata for a site.
+ *
- * Use the $prev_value parameter to differentiate between meta fields with the
- * same key and site ID.
+ *
- * If the meta field for the site does not exist, it will be added.
+ *
- * @since 5.1.0
+ *
- * @param int    $site_id    Site ID.
- * @param string $meta_key   Metadata key.
- * @param mixed  $meta_value Metadata value. Must be serializable if non-scalar.
- * @param mixed  $prev_value Optional. Previous value to check before removing.
- *                           Default empty.
- * @return int|bool Meta ID if the key didn't exist, true on successful update,
- *                  false on failure.
- */
-function update_site_meta( $site_id, $meta_key, $meta_value, $prev_value = '' ) {
-        return update_metadata( 'blog', $site_id, $meta_key, $meta_value, $prev_value );
+}
-/**
- * Deletes everything from site meta matching meta key.
+ *
- * @since 5.1.0
+ *
- * @param string $meta_key Metadata key to search for when deleting.
- * @return bool Whether the site meta key was deleted from the database.
- */
-function delete_site_meta_by_key( $meta_key ) {
-        return delete_metadata( 'blog', null, $meta_key, '', true );
+}
-/**
  * Switch the current blog.
+ *
  * This function is useful if you need to pull posts, or other information,
 …
+}
 /**
- * Retrieves a list of networks.
+ *
- * @since 4.6.0
+ *
- * @param string|array $args Optional. Array or string of arguments. See WP_Network_Query::parse_query()
- *                           for information on accepted arguments. Default empty array.
- * @return array|int List of WP_Network objects, a list of network ids when 'fields' is set to 'ids',
- *                   or the number of networks when 'count' is passed as a query var.
- */
-function get_networks( $args = array() ) {
-        $query = new WP_Network_Query();
-        return $query->query( $args );
+}
-/**
- * Retrieves network data given a network ID or network object.
+ *
- * Network data will be cached and returned after being passed through a filter.
- * If the provided network is empty, the current network global will be used.
+ *
- * @since 4.6.0
+ *
- * @global WP_Network $current_site
+ *
- * @param WP_Network|int|null $network Optional. Network to retrieve. Default is the current network.
- * @return WP_Network|null The network object or null if not found.
- */
-function get_network( $network = null ) {
-        global $current_site;
-        if ( empty( $network ) && isset( $current_site ) ) {
-                $network = $current_site;
+        }
-        if ( $network instanceof WP_Network ) {
-                $_network = $network;
-        } elseif ( is_object( $network ) ) {
-                $_network = new WP_Network( $network );
-        } else {
-                $_network = WP_Network::get_instance( $network );
+        }
-        if ( ! $_network ) {
-                return null;
+        }
-        /**
-         * Fires after a network is retrieved.
+         *
-         * @since 4.6.0
+         *
-         * @param WP_Network $_network Network data.
-         */
-        $_network = apply_filters( 'get_network', $_network );
-        return $_network;
+}
-/**
- * Removes a network from the object cache.
+ *
- * @since 4.6.0
+ *
- * @global bool $_wp_suspend_cache_invalidation
+ *
- * @param int|array $ids Network ID or an array of network IDs to remove from cache.
- */
-function clean_network_cache( $ids ) {
-        global $_wp_suspend_cache_invalidation;
-        if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
-                return;
+        }
-        foreach ( (array) $ids as $id ) {
-                wp_cache_delete( $id, 'networks' );
-                /**
-                 * Fires immediately after a network has been removed from the object cache.
+                 *
-                 * @since 4.6.0
+                 *
-                 * @param int $id Network ID.
-                 */
-                do_action( 'clean_network_cache', $id );
+        }
-        wp_cache_set( 'last_changed', microtime(), 'networks' );
+}
-/**
- * Updates the network cache of given networks.
+ *
- * Will add the networks in $networks to the cache. If network ID already exists
- * in the network cache then it will not be updated. The network is added to the
- * cache using the network group with the key using the ID of the networks.
+ *
- * @since 4.6.0
+ *
- * @param array $networks Array of network row objects.
- */
-function update_network_cache( $networks ) {
-        foreach ( (array) $networks as $network ) {
-                wp_cache_add( $network->id, $network, 'networks' );
+        }
+}
-/**
- * Adds any networks from the given IDs to the cache that do not already exist in cache.
+ *
- * @since 4.6.0
- * @access private
+ *
- * @see update_network_cache()
- * @global wpdb $wpdb WordPress database abstraction object.
+ *
- * @param array $network_ids Array of network IDs.
- */
-function _prime_network_caches( $network_ids ) {
-        global $wpdb;
-        $non_cached_ids = _get_non_cached_ids( $network_ids, 'networks' );
-        if ( ! empty( $non_cached_ids ) ) {
-                $fresh_networks = $wpdb->get_results( sprintf( "SELECT $wpdb->site.* FROM $wpdb->site WHERE id IN (%s)", join( ',', array_map( 'intval', $non_cached_ids ) ) ) ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
-                update_network_cache( $fresh_networks );
+        }
+}
-/**
  * Handler for updating the site's last updated date when a post is published or
  * an already published post is changed.
+ *
 …
         update_posts_count();
+}
-/**
- * Updates the count of sites for a network based on a changed site.
+ *
- * @since 5.1.0
+ *
- * @param WP_Site      $new_site The site object that has been inserted, updated or deleted.
- * @param WP_Site|null $old_site Optional. If $new_site has been updated, this must be the previous
- *                               state of that site. Default null.
- */
-function wp_maybe_update_network_site_counts_on_update( $new_site, $old_site = null ) {
-        if ( null === $old_site ) {
-                wp_maybe_update_network_site_counts( $new_site->network_id );
-                return;
+        }
-        if ( $new_site->network_id != $old_site->network_id ) {
-                wp_maybe_update_network_site_counts( $new_site->network_id );
-                wp_maybe_update_network_site_counts( $old_site->network_id );
+        }
+}
-/**
- * Triggers actions on site status updates.
+ *
- * @since 5.1.0
+ *
- * @param WP_Site      $new_site The site object after the update.
- * @param WP_Site|null $old_site Optional. If $new_site has been updated, this must be the previous
- *                               state of that site. Default null.
- */
-function wp_maybe_transition_site_statuses_on_update( $new_site, $old_site = null ) {
-        $site_id = $new_site->id;
-        // Use the default values for a site if no previous state is given.
-        if ( ! $old_site ) {
-                $old_site = new WP_Site( new stdClass() );
+        }
-        if ( $new_site->spam != $old_site->spam ) {
-                if ( 1 == $new_site->spam ) {
-                        /**
-                         * Fires when the 'spam' status is added to a site.
+                         *
-                         * @since MU (3.0.0)
+                         *
-                         * @param int $site_id Site ID.
-                         */
-                        do_action( 'make_spam_blog', $site_id );
-                } else {
-                        /**
-                         * Fires when the 'spam' status is removed from a site.
+                         *
-                         * @since MU (3.0.0)
+                         *
-                         * @param int $site_id Site ID.
-                         */
-                        do_action( 'make_ham_blog', $site_id );
+                }
+        }
-        if ( $new_site->mature != $old_site->mature ) {
-                if ( 1 == $new_site->mature ) {
-                        /**
-                         * Fires when the 'mature' status is added to a site.
+                         *
-                         * @since 3.1.0
+                         *
-                         * @param int $site_id Site ID.
-                         */
-                        do_action( 'mature_blog', $site_id );
-                } else {
-                        /**
-                         * Fires when the 'mature' status is removed from a site.
+                         *
-                         * @since 3.1.0
+                         *
-                         * @param int $site_id Site ID.
-                         */
-                        do_action( 'unmature_blog', $site_id );
+                }
+        }
-        if ( $new_site->archived != $old_site->archived ) {
-                if ( 1 == $new_site->archived ) {
-                        /**
-                         * Fires when the 'archived' status is added to a site.
+                         *
-                         * @since MU (3.0.0)
+                         *
-                         * @param int $site_id Site ID.
-                         */
-                        do_action( 'archive_blog', $site_id );
-                } else {
-                        /**
-                         * Fires when the 'archived' status is removed from a site.
+                         *
-                         * @since MU (3.0.0)
+                         *
-                         * @param int $site_id Site ID.
-                         */
-                        do_action( 'unarchive_blog', $site_id );
+                }
+        }
-        if ( $new_site->deleted != $old_site->deleted ) {
-                if ( 1 == $new_site->deleted ) {
-                        /**
-                         * Fires when the 'deleted' status is added to a site.
+                         *
-                         * @since 3.5.0
+                         *
-                         * @param int $site_id Site ID.
-                         */
-                        do_action( 'make_delete_blog', $site_id );
-                } else {
-                        /**
-                         * Fires when the 'deleted' status is removed from a site.
+                         *
-                         * @since 3.5.0
+                         *
-                         * @param int $site_id Site ID.
-                         */
-                        do_action( 'make_undelete_blog', $site_id );
+                }
+        }
-        if ( $new_site->public != $old_site->public ) {
-                /**
-                 * Fires after the current blog's 'public' setting is updated.
+                 *
-                 * @since MU (3.0.0)
+                 *
-                 * @param int    $site_id Site ID.
-                 * @param string $value   The value of the site status.
-                 */
-                do_action( 'update_blog_public', $site_id, $new_site->public );
+        }
+}
-/**
- * Cleans the necessary caches after specific site data has been updated.
+ *
- * @since 5.1.0
+ *
- * @param WP_Site $new_site The site object after the update.
- * @param WP_Site $old_site The site obejct prior to the update.
- */
-function wp_maybe_clean_new_site_cache_on_update( $new_site, $old_site ) {
-        if ( $old_site->domain !== $new_site->domain || $old_site->path !== $new_site->path ) {
-                clean_blog_cache( $new_site );
+        }
+}
-/**
- * Updates the `blog_public` option for a given site ID.
+ *
- * @since 5.1.0
+ *
- * @param int    $site_id Site ID.
- * @param string $public  The value of the site status.
- */
-function wp_update_blog_public_option_on_site_update( $site_id, $public ) {
-        // Bail if the site's database tables do not exist (yet).
-        if ( ! wp_is_site_initialized( $site_id ) ) {
-                return;
+        }
-        update_blog_option( $site_id, 'blog_public', $public );
+}
-/**
- * Sets the last changed time for the 'sites' cache group.
+ *
- * @since 5.1.0
- */
-function wp_cache_set_sites_last_changed() {
-        wp_cache_set( 'last_changed', microtime(), 'sites' );
+}
-/**
- * Aborts calls to site meta if it is not supported.
+ *
- * @since 5.1.0
+ *
- * @global wpdb $wpdb WordPress database abstraction object.
+ *
- * @param mixed $check Skip-value for whether to proceed site meta function execution.
- * @return mixed Original value of $check, or false if site meta is not supported.
- */
-function wp_check_site_meta_support_prefilter( $check ) {
-        if ( ! is_site_meta_supported() ) {
-                /* translators: %s: database table name */
-                _doing_it_wrong( __FUNCTION__, sprintf( __( 'The %s table is not installed. Please run the network database upgrade.' ), $GLOBALS['wpdb']->blogmeta ), '5.1.0' );
-                return false;
+        }
-        return $check;
+}

src/wp-includes/ms-network.php

+<?php
+/**
+ * Network API
+ *
+ * @package WordPress
+ * @subpackage Multisite
+ * @since 5.1.0
+ */
+/**
+ * Retrieves network data given a network ID or network object.
+ *
+ * Network data will be cached and returned after being passed through a filter.
+ * If the provided network is empty, the current network global will be used.
+ *
+ * @since 4.6.0
+ *
+ * @global WP_Network $current_site
+ *
+ * @param WP_Network|int|null $network Optional. Network to retrieve. Default is the current network.
+ * @return WP_Network|null The network object or null if not found.
+ */
+function get_network( $network = null ) {
+        global $current_site;
+        if ( empty( $network ) && isset( $current_site ) ) {
+                $network = $current_site;
+        }
+        if ( $network instanceof WP_Network ) {
+                $_network = $network;
+        } elseif ( is_object( $network ) ) {
+                $_network = new WP_Network( $network );
+        } else {
+                $_network = WP_Network::get_instance( $network );
+        }
+        if ( ! $_network ) {
+                return null;
+        }
+        /**
+         * Fires after a network is retrieved.
+         *
+         * @since 4.6.0
+         *
+         * @param WP_Network $_network Network data.
+         */
+        $_network = apply_filters( 'get_network', $_network );
+        return $_network;
+}
+/**
+ * Retrieves a list of networks.
+ *
+ * @since 4.6.0
+ *
+ * @param string|array $args Optional. Array or string of arguments. See WP_Network_Query::parse_query()
+ *                           for information on accepted arguments. Default empty array.
+ * @return array|int List of WP_Network objects, a list of network ids when 'fields' is set to 'ids',
+ *                   or the number of networks when 'count' is passed as a query var.
+ */
+function get_networks( $args = array() ) {
+        $query = new WP_Network_Query();
+        return $query->query( $args );
+}
+/**
+ * Removes a network from the object cache.
+ *
+ * @since 4.6.0
+ *
+ * @global bool $_wp_suspend_cache_invalidation
+ *
+ * @param int|array $ids Network ID or an array of network IDs to remove from cache.
+ */
+function clean_network_cache( $ids ) {
+        global $_wp_suspend_cache_invalidation;
+        if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
+                return;
+        }
+        foreach ( (array) $ids as $id ) {
+                wp_cache_delete( $id, 'networks' );
+                /**
+                 * Fires immediately after a network has been removed from the object cache.
+                 *
+                 * @since 4.6.0
+                 *
+                 * @param int $id Network ID.
+                 */
+                do_action( 'clean_network_cache', $id );
+        }
+        wp_cache_set( 'last_changed', microtime(), 'networks' );
+}
+/**
+ * Updates the network cache of given networks.
+ *
+ * Will add the networks in $networks to the cache. If network ID already exists
+ * in the network cache then it will not be updated. The network is added to the
+ * cache using the network group with the key using the ID of the networks.
+ *
+ * @since 4.6.0
+ *
+ * @param array $networks Array of network row objects.
+ */
+function update_network_cache( $networks ) {
+        foreach ( (array) $networks as $network ) {
+                wp_cache_add( $network->id, $network, 'networks' );
+        }
+}
+/**
+ * Adds any networks from the given IDs to the cache that do not already exist in cache.
+ *
+ * @since 4.6.0
+ * @access private
+ *
+ * @see update_network_cache()
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param array $network_ids Array of network IDs.
+ */
+function _prime_network_caches( $network_ids ) {
+        global $wpdb;
+        $non_cached_ids = _get_non_cached_ids( $network_ids, 'networks' );
+        if ( ! empty( $non_cached_ids ) ) {
+                $fresh_networks = $wpdb->get_results( sprintf( "SELECT $wpdb->site.* FROM $wpdb->site WHERE id IN (%s)", join( ',', array_map( 'intval', $non_cached_ids ) ) ) ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+                update_network_cache( $fresh_networks );
+        }
+}

src/wp-includes/ms-site.php

+<?php
+/**
+ * Site API
+ *
+ * @package WordPress
+ * @subpackage Multisite
+ * @since 5.1.0
+ */
+/**
+ * Inserts a new site into the database.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param array $data {
+ *     Data for the new site that should be inserted.
+ *
+ *     @type string $domain       Site domain. Default empty string.
+ *     @type string $path         Site path. Default '/'.
+ *     @type int    $network_id   The site's network ID. Default is the current network ID.
+ *     @type string $registered   When the site was registered, in SQL datetime format. Default is
+ *                                the current time.
+ *     @type string $last_updated When the site was last updated, in SQL datetime format. Default is
+ *                                the value of $registered.
+ *     @type int    $public       Whether the site is public. Default 1.
+ *     @type int    $archived     Whether the site is archived. Default 0.
+ *     @type int    $mature       Whether the site is mature. Default 0.
+ *     @type int    $spam         Whether the site is spam. Default 0.
+ *     @type int    $deleted      Whether the site is deleted. Default 0.
+ *     @type int    $lang_id      The site's language ID. Currently unused. Default 0.
+ * }
+ * @return int|WP_Error The new site's ID on success, or error object on failure.
+ */
+function wp_insert_site( array $data ) {
+        global $wpdb;
+        $now = current_time( 'mysql', true );
+        $defaults = array(
+                'domain'       => '',
+                'path'         => '/',
+                'network_id'   => get_current_network_id(),
+                'registered'   => $now,
+                'last_updated' => $now,
+                'public'       => 1,
+                'archived'     => 0,
+                'mature'       => 0,
+                'spam'         => 0,
+                'deleted'      => 0,
+                'lang_id'      => 0,
+        );
+        // Extract the passed arguments that may be relevant for site initialization.
+        $args = array_diff_key( $data, $defaults );
+        if ( isset( $args['site_id'] ) ) {
+                unset( $args['site_id'] );
+        }
+        $data = wp_prepare_site_data( $data, $defaults );
+        if ( is_wp_error( $data ) ) {
+                return $data;
+        }
+        if ( false === $wpdb->insert( $wpdb->blogs, $data ) ) {
+                return new WP_Error( 'db_insert_error', __( 'Could not insert site into the database.' ), $wpdb->last_error );
+        }
+        $new_site = get_site( $wpdb->insert_id );
+        clean_blog_cache( $new_site );
+        /**
+         * Fires once a site has been inserted into the database.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Site $new_site New site object.
+         */
+        do_action( 'wp_insert_site', $new_site );
+        /**
+         * Fires when a site's initialization routine should be executed.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Site $new_site New site object.
+         * @param array   $args     Arguments for the initialization.
+         */
+        do_action( 'wp_initialize_site', $new_site, $args );
+        // Only compute extra hook parameters if the deprecated hook is actually in use.
+        if ( has_action( 'wpmu_new_blog' ) ) {
+                $user_id = ! empty( $args['user_id'] ) ? $args['user_id'] : 0;
+                $meta    = ! empty( $args['options'] ) ? $args['options'] : array();
+                /**
+                 * Fires immediately after a new site is created.
+                 *
+                 * @since MU (3.0.0)
+                 * @deprecated 5.1.0 Use wp_insert_site
+                 *
+                 * @param int    $site_id    Site ID.
+                 * @param int    $user_id    User ID.
+                 * @param string $domain     Site domain.
+                 * @param string $path       Site path.
+                 * @param int    $network_id Network ID. Only relevant on multi-network installations.
+                 * @param array  $meta       Meta data. Used to set initial site options.
+                 */
+                do_action_deprecated( 'wpmu_new_blog', array( $new_site->id, $user_id, $new_site->domain, $new_site->path, $new_site->network_id, $meta ), '5.1.0', 'wp_insert_site' );
+        }
+        return (int) $new_site->id;
+}
+/**
+ * Updates a site in the database.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int   $site_id ID of the site that should be updated.
+ * @param array $data    Site data to update. See {@see wp_insert_site()} for the list of supported keys.
+ * @return int|WP_Error The updated site's ID on success, or error object on failure.
+ */
+function wp_update_site( $site_id, array $data ) {
+        global $wpdb;
+        if ( empty( $site_id ) ) {
+                return new WP_Error( 'site_empty_id', __( 'Site ID must not be empty.' ) );
+        }
+        $old_site = get_site( $site_id );
+        if ( ! $old_site ) {
+                return new WP_Error( 'site_not_exist', __( 'Site does not exist.' ) );
+        }
+        $defaults                 = $old_site->to_array();
+        $defaults['network_id']   = (int) $defaults['site_id'];
+        $defaults['last_updated'] = current_time( 'mysql', true );
+        unset( $defaults['blog_id'], $defaults['site_id'] );
+        $data = wp_prepare_site_data( $data, $defaults, $old_site );
+        if ( is_wp_error( $data ) ) {
+                return $data;
+        }
+        if ( false === $wpdb->update( $wpdb->blogs, $data, array( 'blog_id' => $old_site->id ) ) ) {
+                return new WP_Error( 'db_update_error', __( 'Could not update site in the database.' ), $wpdb->last_error );
+        }
+        clean_blog_cache( $old_site );
+        $new_site = get_site( $old_site->id );
+        /**
+         * Fires once a site has been updated in the database.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Site $new_site New site object.
+         * @param WP_Site $old_site Old site object.
+         */
+        do_action( 'wp_update_site', $new_site, $old_site );
+        return (int) $new_site->id;
+}
+/**
+ * Deletes a site from the database.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int $site_id ID of the site that should be deleted.
+ * @return WP_Site|WP_Error The deleted site object on success, or error object on failure.
+ */
+function wp_delete_site( $site_id ) {
+        global $wpdb;
+        if ( empty( $site_id ) ) {
+                return new WP_Error( 'site_empty_id', __( 'Site ID must not be empty.' ) );
+        }
+        $old_site = get_site( $site_id );
+        if ( ! $old_site ) {
+                return new WP_Error( 'site_not_exist', __( 'Site does not exist.' ) );
+        }
+        $errors = new WP_Error();
+        /**
+         * Fires before a site should be deleted from the database.
+         *
+         * Plugins should amend the `$errors` object via its `WP_Error::add()` method. If any errors
+         * are present, the site will not be deleted.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Error $errors   Error object to add validation errors to.
+         * @param WP_Site  $old_site The site object to be deleted.
+         */
+        do_action( 'wp_validate_site_deletion', $errors, $old_site );
+        if ( ! empty( $errors->errors ) ) {
+                return $errors;
+        }
+        /**
+         * Fires before a site is deleted.
+         *
+         * @since MU (3.0.0)
+         * @deprecated 5.1.0
+         *
+         * @param int  $site_id The site ID.
+         * @param bool $drop    True if site's table should be dropped. Default is false.
+         */
+        do_action_deprecated( 'delete_blog', array( $old_site->id, true ), '5.1.0' );
+        /**
+         * Fires when a site's uninitialization routine should be executed.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Site $old_site Deleted site object.
+         */
+        do_action( 'wp_uninitialize_site', $old_site );
+        if ( is_site_meta_supported() ) {
+                $blog_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->blogmeta WHERE blog_id = %d ", $old_site->id ) );
+                foreach ( $blog_meta_ids as $mid ) {
+                        delete_metadata_by_mid( 'blog', $mid );
+                }
+        }
+        if ( false === $wpdb->delete( $wpdb->blogs, array( 'blog_id' => $old_site->id ) ) ) {
+                return new WP_Error( 'db_delete_error', __( 'Could not delete site from the database.' ), $wpdb->last_error );
+        }
+        clean_blog_cache( $old_site );
+        /**
+         * Fires once a site has been deleted from the database.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Site $old_site Deleted site object.
+         */
+        do_action( 'wp_delete_site', $old_site );
+        /**
+         * Fires after the site is deleted from the network.
+         *
+         * @since 4.8.0
+         * @deprecated 5.1.0
+         *
+         * @param int  $site_id The site ID.
+         * @param bool $drop    True if site's tables should be dropped. Default is false.
+         */
+        do_action_deprecated( 'deleted_blog', array( $old_site->id, true ), '5.1.0' );
+        return $old_site;
+}
+/**
+ * Retrieves site data given a site ID or site object.
+ *
+ * Site data will be cached and returned after being passed through a filter.
+ * If the provided site is empty, the current site global will be used.
+ *
+ * @since 4.6.0
+ *
+ * @param WP_Site|int|null $site Optional. Site to retrieve. Default is the current site.
+ * @return WP_Site|null The site object or null if not found.
+ */
+function get_site( $site = null ) {
+        if ( empty( $site ) ) {
+                $site = get_current_blog_id();
+        }
+        if ( $site instanceof WP_Site ) {
+                $_site = $site;
+        } elseif ( is_object( $site ) ) {
+                $_site = new WP_Site( $site );
+        } else {
+                $_site = WP_Site::get_instance( $site );
+        }
+        if ( ! $_site ) {
+                return null;
+        }
+        /**
+         * Fires after a site is retrieved.
+         *
+         * @since 4.6.0
+         *
+         * @param WP_Site $_site Site data.
+         */
+        $_site = apply_filters( 'get_site', $_site );
+        return $_site;
+}
+/**
+ * Adds any sites from the given ids to the cache that do not already exist in cache.
+ *
+ * @since 4.6.0
+ * @since 5.1.0 Introduced the `$update_meta_cache` parameter.
+ * @access private
+ *
+ * @see update_site_cache()
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param array $ids               ID list.
+ * @param bool  $update_meta_cache Optional. Whether to update the meta cache. Default true.
+ */
+function _prime_site_caches( $ids, $update_meta_cache = true ) {
+        global $wpdb;
+        $non_cached_ids = _get_non_cached_ids( $ids, 'sites' );
+        if ( ! empty( $non_cached_ids ) ) {
+                $fresh_sites = $wpdb->get_results( sprintf( "SELECT * FROM $wpdb->blogs WHERE blog_id IN (%s)", join( ',', array_map( 'intval', $non_cached_ids ) ) ) ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+                update_site_cache( $fresh_sites, $update_meta_cache );
+        }
+}
+/**
+ * Updates sites in cache.
+ *
+ * @since 4.6.0
+ * @since 5.1.0 Introduced the `$update_meta_cache` parameter.
+ *
+ * @param array $sites             Array of site objects.
+ * @param bool  $update_meta_cache Whether to update site meta cache. Default true.
+ */
+function update_site_cache( $sites, $update_meta_cache = true ) {
+        if ( ! $sites ) {
+                return;
+        }
+        $site_ids = array();
+        foreach ( $sites as $site ) {
+                $site_ids[] = $site->blog_id;
+                wp_cache_add( $site->blog_id, $site, 'sites' );
+                wp_cache_add( $site->blog_id . 'short', $site, 'blog-details' );
+        }
+        if ( $update_meta_cache ) {
+                update_sitemeta_cache( $site_ids );
+        }
+}
+/**
+ * Updates metadata cache for list of site IDs.
+ *
+ * Performs SQL query to retrieve all metadata for the sites matching `$site_ids` and stores them in the cache.
+ * Subsequent calls to `get_site_meta()` will not need to query the database.
+ *
+ * @since 5.1.0
+ *
+ * @param array $site_ids List of site IDs.
+ * @return array|false Returns false if there is nothing to update. Returns an array of metadata on success.
+ */
+function update_sitemeta_cache( $site_ids ) {
+        return update_meta_cache( 'blog', $site_ids );
+}
+/**
+ * Retrieves a list of sites matching requested arguments.
+ *
+ * @since 4.6.0
+ * @since 4.8.0 Introduced the 'lang_id', 'lang__in', and 'lang__not_in' parameters.
+ *
+ * @see WP_Site_Query::parse_query()
+ *
+ * @param string|array $args {
+ *     Optional. Array or query string of site query parameters. Default empty.
+ *
+ *     @type array        $site__in          Array of site IDs to include. Default empty.
+ *     @type array        $site__not_in      Array of site IDs to exclude. Default empty.
+ *     @type bool         $count             Whether to return a site count (true) or array of site objects.
+ *                                           Default false.
+ *     @type array        $date_query        Date query clauses to limit sites by. See WP_Date_Query.
+ *                                           Default null.
+ *     @type string       $fields            Site fields to return. Accepts 'ids' (returns an array of site IDs)
+ *                                           or empty (returns an array of complete site objects). Default empty.
+ *     @type int          $ID                A site ID to only return that site. Default empty.
+ *     @type int          $number            Maximum number of sites to retrieve. Default 100.
+ *     @type int          $offset            Number of sites to offset the query. Used to build LIMIT clause.
+ *                                           Default 0.
+ *     @type bool         $no_found_rows     Whether to disable the `SQL_CALC_FOUND_ROWS` query. Default true.
+ *     @type string|array $orderby           Site status or array of statuses. Accepts 'id', 'domain', 'path',
+ *                                           'network_id', 'last_updated', 'registered', 'domain_length',
+ *                                           'path_length', 'site__in' and 'network__in'. Also accepts false,
+ *                                           an empty array, or 'none' to disable `ORDER BY` clause.
+ *                                           Default 'id'.
+ *     @type string       $order             How to order retrieved sites. Accepts 'ASC', 'DESC'. Default 'ASC'.
+ *     @type int          $network_id        Limit results to those affiliated with a given network ID. If 0,
+ *                                           include all networks. Default 0.
+ *     @type array        $network__in       Array of network IDs to include affiliated sites for. Default empty.
+ *     @type array        $network__not_in   Array of network IDs to exclude affiliated sites for. Default empty.
+ *     @type string       $domain            Limit results to those affiliated with a given domain. Default empty.
+ *     @type array        $domain__in        Array of domains to include affiliated sites for. Default empty.
+ *     @type array        $domain__not_in    Array of domains to exclude affiliated sites for. Default empty.
+ *     @type string       $path              Limit results to those affiliated with a given path. Default empty.
+ *     @type array        $path__in          Array of paths to include affiliated sites for. Default empty.
+ *     @type array        $path__not_in      Array of paths to exclude affiliated sites for. Default empty.
+ *     @type int          $public            Limit results to public sites. Accepts '1' or '0'. Default empty.
+ *     @type int          $archived          Limit results to archived sites. Accepts '1' or '0'. Default empty.
+ *     @type int          $mature            Limit results to mature sites. Accepts '1' or '0'. Default empty.
+ *     @type int          $spam              Limit results to spam sites. Accepts '1' or '0'. Default empty.
+ *     @type int          $deleted           Limit results to deleted sites. Accepts '1' or '0'. Default empty.
+ *     @type int          $lang_id           Limit results to a language ID. Default empty.
+ *     @type array        $lang__in          Array of language IDs to include affiliated sites for. Default empty.
+ *     @type array        $lang__not_in      Array of language IDs to exclude affiliated sites for. Default empty.
+ *     @type string       $search            Search term(s) to retrieve matching sites for. Default empty.
+ *     @type array        $search_columns    Array of column names to be searched. Accepts 'domain' and 'path'.
+ *                                           Default empty array.
+ *     @type bool         $update_site_cache Whether to prime the cache for found sites. Default true.
+ * }
+ * @return array|int List of WP_Site objects, a list of site ids when 'fields' is set to 'ids',
+ *                   or the number of sites when 'count' is passed as a query var.
+ */
+function get_sites( $args = array() ) {
+        $query = new WP_Site_Query();
+        return $query->query( $args );
+}
+/**
+ * Prepares site data for insertion or update in the database.
+ *
+ * @since 5.1.0
+ *
+ * @param array        $data     Associative array of site data passed to the respective function.
+ *                               See {@see wp_insert_site()} for the possibly included data.
+ * @param array        $defaults Site data defaults to parse $data against.
+ * @param WP_Site|null $old_site Optional. Old site object if an update, or null if an insertion.
+ *                               Default null.
+ * @return array|WP_Error Site data ready for a database transaction, or WP_Error in case a validation
+ *                        error occurred.
+ */
+function wp_prepare_site_data( $data, $defaults, $old_site = null ) {
+        // Maintain backward-compatibility with `$site_id` as network ID.
+        if ( isset( $data['site_id'] ) ) {
+                if ( ! empty( $data['site_id'] ) && empty( $data['network_id'] ) ) {
+                        $data['network_id'] = $data['site_id'];
+                }
+                unset( $data['site_id'] );
+        }
+        /**
+         * Filters passed site data in order to normalize it.
+         *
+         * @since 5.1.0
+         *
+         * @param array $data Associative array of site data passed to the respective function.
+         *                    See {@see wp_insert_site()} for the possibly included data.
+         */
+        $data = apply_filters( 'wp_normalize_site_data', $data );
+        $whitelist = array( 'domain', 'path', 'network_id', 'registered', 'last_updated', 'public', 'archived', 'mature', 'spam', 'deleted', 'lang_id' );
+        $data      = array_intersect_key( wp_parse_args( $data, $defaults ), array_flip( $whitelist ) );
+        $errors = new WP_Error();
+        /**
+         * Fires when data should be validated for a site prior to inserting or updating in the database.
+         *
+         * Plugins should amend the `$errors` object via its `WP_Error::add()` method.
+         *
+         * @since 5.1.0
+         *
+         * @param WP_Error     $errors   Error object to add validation errors to.
+         * @param array        $data     Associative array of complete site data. See {@see wp_insert_site()}
+         *                               for the included data.
+         * @param WP_Site|null $old_site The old site object if the data belongs to a site being updated,
+         *                               or null if it is a new site being inserted.
+         */
+        do_action( 'wp_validate_site_data', $errors, $data, $old_site );
+        if ( ! empty( $errors->errors ) ) {
+                return $errors;
+        }
+        // Prepare for database.
+        $data['site_id'] = $data['network_id'];
+        unset( $data['network_id'] );
+        return $data;
+}
+/**
+ * Normalizes data for a site prior to inserting or updating in the database.
+ *
+ * @since 5.1.0
+ *
+ * @param array $data Associative array of site data passed to the respective function.
+ *                    See {@see wp_insert_site()} for the possibly included data.
+ * @return array Normalized site data.
+ */
+function wp_normalize_site_data( $data ) {
+        // Sanitize domain if passed.
+        if ( array_key_exists( 'domain', $data ) ) {
+                $data['domain'] = trim( $data['domain'] );
+                $data['domain'] = preg_replace( '/\s+/', '', sanitize_user( $data['domain'], true ) );
+                if ( is_subdomain_install() ) {
+                        $data['domain'] = str_replace( '@', '', $data['domain'] );
+                }
+        }
+        // Sanitize path if passed.
+        if ( array_key_exists( 'path', $data ) ) {
+                $data['path'] = trailingslashit( '/' . trim( $data['path'], '/' ) );
+        }
+        // Sanitize network ID if passed.
+        if ( array_key_exists( 'network_id', $data ) ) {
+                $data['network_id'] = (int) $data['network_id'];
+        }
+        // Sanitize status fields if passed.
+        $status_fields = array( 'public', 'archived', 'mature', 'spam', 'deleted' );
+        foreach ( $status_fields as $status_field ) {
+                if ( array_key_exists( $status_field, $data ) ) {
+                        $data[ $status_field ] = (int) $data[ $status_field ];
+                }
+        }
+        // Strip date fields if empty.
+        $date_fields = array( 'registered', 'last_updated' );
+        foreach ( $date_fields as $date_field ) {
+                if ( ! array_key_exists( $date_field, $data ) ) {
+                        continue;
+                }
+                if ( empty( $data[ $date_field ] ) || '0000-00-00 00:00:00' === $data[ $date_field ] ) {
+                        unset( $data[ $date_field ] );
+                }
+        }
+        return $data;
+}
+/**
+ * Validates data for a site prior to inserting or updating in the database.
+ *
+ * @since 5.1.0
+ *
+ * @param WP_Error     $errors   Error object, passed by reference. Will contain validation errors if
+ *                               any occurred.
+ * @param array        $data     Associative array of complete site data. See {@see wp_insert_site()}
+ *                               for the included data.
+ * @param WP_Site|null $old_site The old site object if the data belongs to a site being updated,
+ *                               or null if it is a new site being inserted.
+ */
+function wp_validate_site_data( $errors, $data, $old_site = null ) {
+        // A domain must always be present.
+        if ( empty( $data['domain'] ) ) {
+                $errors->add( 'site_empty_domain', __( 'Site domain must not be empty.' ) );
+        }
+        // A path must always be present.
+        if ( empty( $data['path'] ) ) {
+                $errors->add( 'site_empty_path', __( 'Site path must not be empty.' ) );
+        }
+        // A network ID must always be present.
+        if ( empty( $data['network_id'] ) ) {
+                $errors->add( 'site_empty_network_id', __( 'Site network ID must be provided.' ) );
+        }
+        // Both registration and last updated dates must always be present and valid.
+        $date_fields = array( 'registered', 'last_updated' );
+        foreach ( $date_fields as $date_field ) {
+                if ( empty( $data[ $date_field ] ) ) {
+                        $errors->add( 'site_empty_' . $date_field, __( 'Both registration and last updated dates must be provided.' ) );
+                        break;
+                }
+                // Allow '0000-00-00 00:00:00', although it be stripped out at this point.
+                if ( '0000-00-00 00:00:00' !== $data[ $date_field ] ) {
+                        $month      = substr( $data[ $date_field ], 5, 2 );
+                        $day        = substr( $data[ $date_field ], 8, 2 );
+                        $year       = substr( $data[ $date_field ], 0, 4 );
+                        $valid_date = wp_checkdate( $month, $day, $year, $data[ $date_field ] );
+                        if ( ! $valid_date ) {
+                                $errors->add( 'site_invalid_' . $date_field, __( 'Both registration and last updated dates must be valid dates.' ) );
+                                break;
+                        }
+                }
+        }
+        if ( ! empty( $errors->errors ) ) {
+                return;
+        }
+        // If a new site, or domain/path/network ID have changed, ensure uniqueness.
+        if ( ! $old_site
+                || $data['domain'] !== $old_site->domain
+                || $data['path'] !== $old_site->path
+                || $data['network_id'] !== $old_site->network_id
+        ) {
+                if ( domain_exists( $data['domain'], $data['path'], $data['network_id'] ) ) {
+                        $errors->add( 'site_taken', __( 'Sorry, that site already exists!' ) );
+                }
+        }
+}
+/**
+ * Runs the initialization routine for a given site.
+ *
+ * This process includes creating the site's database tables and
+ * populating them with defaults.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb     $wpdb     WordPress database abstraction object.
+ * @global WP_Roles $wp_roles WordPress role management object.
+ *
+ * @param int|WP_Site $site_id Site ID or object.
+ * @param array       $args    {
+ *     Optional. Arguments to modify the initialization behavior.
+ *
+ *     @type int    $user_id Required. User ID for the site administrator.
+ *     @type string $title   Site title. Default is 'Site %d' where %d is the
+ *                           site ID.
+ *     @type array  $options Custom option $key => $value pairs to use. Default
+ *                           empty array.
+ *     @type array  $meta    Custom site metadata $key => $value pairs to use.
+ *                           Default empty array.
+ * }
+ * @return bool|WP_Error True on success, or error object on failure.
+ */
+function wp_initialize_site( $site_id, array $args = array() ) {
+        global $wpdb, $wp_roles;
+        if ( empty( $site_id ) ) {
+                return new WP_Error( 'site_empty_id', __( 'Site ID must not be empty.' ) );
+        }
+        $site = get_site( $site_id );
+        if ( ! $site ) {
+                return new WP_Error( 'site_invalid_id', __( 'Site with the ID does not exist.' ) );
+        }
+        if ( wp_is_site_initialized( $site ) ) {
+                return new WP_Error( 'site_already_initialized', __( 'The site appears to be already initialized.' ) );
+        }
+        $network = get_network( $site->network_id );
+        if ( ! $network ) {
+                $network = get_network();
+        }
+        $args = wp_parse_args(
+                $args,
+                array(
+                        'user_id' => 0,
+                        /* translators: %d: site ID */
+                        'title'   => sprintf( __( 'Site %d' ), $site->id ),
+                        'options' => array(),
+                        'meta'    => array(),
+                )
+        );
+        /**
+         * Filters the arguments for initializing a site.
+         *
+         * @since 5.1.0
+         *
+         * @param array      $args    Arguments to modify the initialization behavior.
+         * @param WP_Site    $site    Site that is being initialized.
+         * @param WP_Network $network Network that the site belongs to.
+         */
+        $args = apply_filters( 'wp_initialize_site_args', $args, $site, $network );
+        $orig_installing = wp_installing();
+        if ( ! $orig_installing ) {
+                wp_installing( true );
+        }
+        $switch = false;
+        if ( get_current_blog_id() !== $site->id ) {
+                $switch = true;
+                switch_to_blog( $site->id );
+        }
+        require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );
+        // Set up the database tables.
+        make_db_current_silent( 'blog' );
+        $home_scheme    = 'http';
+        $siteurl_scheme = 'http';
+        if ( ! is_subdomain_install() ) {
+                if ( 'https' === parse_url( get_home_url( $network->site_id ), PHP_URL_SCHEME ) ) {
+                        $home_scheme = 'https';
+                }
+                if ( 'https' === parse_url( get_network_option( $network->id, 'siteurl' ), PHP_URL_SCHEME ) ) {
+                        $siteurl_scheme = 'https';
+                }
+        }
+        // Populate the site's options.
+        populate_options(
+                array_merge(
+                        array(
+                                'home'        => untrailingslashit( $home_scheme . '://' . $site->domain . $site->path ),
+                                'siteurl'     => untrailingslashit( $siteurl_scheme . '://' . $site->domain . $site->path ),
+                                'blogname'    => wp_unslash( $args['title'] ),
+                                'admin_email' => '',
+                                'upload_path' => get_network_option( $network->id, 'ms_files_rewriting' ) ? UPLOADBLOGSDIR . "/{$site->id}/files" : get_blog_option( $network->site_id, 'upload_path' ),
+                                'blog_public' => (int) $site->public,
+                                'WPLANG'      => get_network_option( $network->id, 'WPLANG' ),
+                        ),
+                        $args['options']
+                )
+        );
+        // Populate the site's roles.
+        populate_roles();
+        $wp_roles = new WP_Roles();
+        // Populate metadata for the site.
+        populate_site_meta( $site->id, $args['meta'] );
+        // Remove all permissions that may exist for the site.
+        $table_prefix = $wpdb->get_blog_prefix();
+        delete_metadata( 'user', 0, $table_prefix . 'user_level', null, true ); // delete all
+        delete_metadata( 'user', 0, $table_prefix . 'capabilities', null, true ); // delete all
+        // Install default site content.
+        wp_install_defaults( $args['user_id'] );
+        // Set the site administrator.
+        add_user_to_blog( $site->id, $args['user_id'], 'administrator' );
+        if ( ! user_can( $args['user_id'], 'manage_network' ) && ! get_user_meta( $args['user_id'], 'primary_blog', true ) ) {
+                update_user_meta( $args['user_id'], 'primary_blog', $site->id );
+        }
+        if ( $switch ) {
+                restore_current_blog();
+        }
+        wp_installing( $orig_installing );
+        return true;
+}
+/**
+ * Runs the uninitialization routine for a given site.
+ *
+ * This process includes dropping the site's database tables and deleting its uploads directory.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int|WP_Site $site_id Site ID or object.
+ * @return bool|WP_Error True on success, or error object on failure.
+ */
+function wp_uninitialize_site( $site_id ) {
+        global $wpdb;
+        if ( empty( $site_id ) ) {
+                return new WP_Error( 'site_empty_id', __( 'Site ID must not be empty.' ) );
+        }
+        $site = get_site( $site_id );
+        if ( ! $site ) {
+                return new WP_Error( 'site_invalid_id', __( 'Site with the ID does not exist.' ) );
+        }
+        if ( ! wp_is_site_initialized( $site ) ) {
+                return new WP_Error( 'site_already_uninitialized', __( 'The site appears to be already uninitialized.' ) );
+        }
+        $users = get_users(
+                array(
+                        'blog_id' => $site->id,
+                        'fields'  => 'ids',
+                )
+        );
+        // Remove users from the site.
+        if ( ! empty( $users ) ) {
+                foreach ( $users as $user_id ) {
+                        remove_user_from_blog( $user_id, $site->id );
+                }
+        }
+        $switch = false;
+        if ( get_current_blog_id() !== $site->id ) {
+                $switch = true;
+                switch_to_blog( $site->id );
+        }
+        $uploads = wp_get_upload_dir();
+        $tables = $wpdb->tables( 'blog' );
+        /**
+         * Filters the tables to drop when the site is deleted.
+         *
+         * @since MU (3.0.0)
+         *
+         * @param string[] $tables  Array of names of the site tables to be dropped.
+         * @param int      $site_id The ID of the site to drop tables for.
+         */
+        $drop_tables = apply_filters( 'wpmu_drop_tables', $tables, $site->id );
+        foreach ( (array) $drop_tables as $table ) {
+                $wpdb->query( "DROP TABLE IF EXISTS `$table`" ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
+        }
+        /**
+         * Filters the upload base directory to delete when the site is deleted.
+         *
+         * @since MU (3.0.0)
+         *
+         * @param string $uploads['basedir'] Uploads path without subdirectory. @see wp_upload_dir()
+         * @param int    $site_id            The site ID.
+         */
+        $dir     = apply_filters( 'wpmu_delete_blog_upload_dir', $uploads['basedir'], $site->id );
+        $dir     = rtrim( $dir, DIRECTORY_SEPARATOR );
+        $top_dir = $dir;
+        $stack   = array( $dir );
+        $index   = 0;
+        while ( $index < count( $stack ) ) {
+                // Get indexed directory from stack
+                $dir = $stack[ $index ];
+                // phpcs:disable WordPress.PHP.NoSilencedErrors.Discouraged
+                $dh = @opendir( $dir );
+                if ( $dh ) {
+                        $file = @readdir( $dh );
+                        while ( false !== $file ) {
+                                if ( '.' === $file || '..' === $file ) {
+                                        $file = @readdir( $dh );
+                                        continue;
+                                }
+                                if ( @is_dir( $dir . DIRECTORY_SEPARATOR . $file ) ) {
+                                        $stack[] = $dir . DIRECTORY_SEPARATOR . $file;
+                                } elseif ( @is_file( $dir . DIRECTORY_SEPARATOR . $file ) ) {
+                                        @unlink( $dir . DIRECTORY_SEPARATOR . $file );
+                                }
+                                $file = @readdir( $dh );
+                        }
+                        @closedir( $dh );
+                }
+                $index++;
+        }
+        $stack = array_reverse( $stack ); // Last added dirs are deepest
+        foreach ( (array) $stack as $dir ) {
+                if ( $dir != $top_dir ) {
+                        @rmdir( $dir );
+                }
+        }
+        // phpcs:enable WordPress.PHP.NoSilencedErrors.Discouraged
+        if ( $switch ) {
+                restore_current_blog();
+        }
+        return true;
+}
+/**
+ * Checks whether a site is initialized.
+ *
+ * A site is considered initialized when its database tables are present.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int|WP_Site $site_id Site ID or object.
+ * @return bool True if the site is initialized, false otherwise.
+ */
+function wp_is_site_initialized( $site_id ) {
+        global $wpdb;
+        if ( is_object( $site_id ) ) {
+                $site_id = $site_id->blog_id;
+        }
+        $site_id = (int) $site_id;
+        /**
+         * Filters the check for whether a site is initialized before the database is accessed.
+         *
+         * Returning a non-null value will effectively short-circuit the function, returning
+         * that value instead.
+         *
+         * @since 5.1.0
+         *
+         * @param bool|null $pre     The value to return, if not null.
+         * @param int       $site_id The site ID that is being checked.
+         */
+        $pre = apply_filters( 'pre_wp_is_site_initialized', null, $site_id );
+        if ( null !== $pre ) {
+                return (bool) $pre;
+        }
+        $switch = false;
+        if ( get_current_blog_id() !== $site_id ) {
+                $switch = true;
+                remove_action( 'switch_blog', 'wp_switch_roles_and_user', 1 );
+                switch_to_blog( $site_id );
+        }
+        $suppress = $wpdb->suppress_errors();
+        $result   = (bool) $wpdb->get_results( "DESCRIBE {$wpdb->posts}" );
+        $wpdb->suppress_errors( $suppress );
+        if ( $switch ) {
+                restore_current_blog();
+                add_action( 'switch_blog', 'wp_switch_roles_and_user', 1, 2 );
+        }
+        return $result;
+}
+/**
+ * Clean the blog cache
+ *
+ * @since 3.5.0
+ *
+ * @global bool $_wp_suspend_cache_invalidation
+ *
+ * @param WP_Site|int $blog The site object or ID to be cleared from cache.
+ */
+function clean_blog_cache( $blog ) {
+        global $_wp_suspend_cache_invalidation;
+        if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
+                return;
+        }
+        if ( empty( $blog ) ) {
+                return;
+        }
+        $blog_id = $blog;
+        $blog    = get_site( $blog_id );
+        if ( ! $blog ) {
+                if ( ! is_numeric( $blog_id ) ) {
+                        return;
+                }
+                // Make sure a WP_Site object exists even when the site has been deleted.
+                $blog = new WP_Site(
+                        (object) array(
+                                'blog_id' => $blog_id,
+                                'domain'  => null,
+                                'path'    => null,
+                        )
+                );
+        }
+        $blog_id         = $blog->blog_id;
+        $domain_path_key = md5( $blog->domain . $blog->path );
+        wp_cache_delete( $blog_id, 'sites' );
+        wp_cache_delete( $blog_id, 'site-details' );
+        wp_cache_delete( $blog_id, 'blog-details' );
+        wp_cache_delete( $blog_id . 'short', 'blog-details' );
+        wp_cache_delete( $domain_path_key, 'blog-lookup' );
+        wp_cache_delete( $domain_path_key, 'blog-id-cache' );
+        wp_cache_delete( 'current_blog_' . $blog->domain, 'site-options' );
+        wp_cache_delete( 'current_blog_' . $blog->domain . $blog->path, 'site-options' );
+        wp_cache_delete( $blog_id, 'blog_meta' );
+        /**
+         * Fires immediately after a site has been removed from the object cache.
+         *
+         * @since 4.6.0
+         *
+         * @param int     $id              Blog ID.
+         * @param WP_Site $blog            Site object.
+         * @param string  $domain_path_key md5 hash of domain and path.
+         */
+        do_action( 'clean_site_cache', $blog_id, $blog, $domain_path_key );
+        wp_cache_set( 'last_changed', microtime(), 'sites' );
+        /**
+         * Fires after the blog details cache is cleared.
+         *
+         * @since 3.4.0
+         * @deprecated 4.9.0 Use clean_site_cache
+         *
+         * @param int $blog_id Blog ID.
+         */
+        do_action_deprecated( 'refresh_blog_details', array( $blog_id ), '4.9.0', 'clean_site_cache' );
+}
+/**
+ * Adds metadata to a site.
+ *
+ * @since 5.1.0
+ *
+ * @param int    $site_id    Site ID.
+ * @param string $meta_key   Metadata name.
+ * @param mixed  $meta_value Metadata value. Must be serializable if non-scalar.
+ * @param bool   $unique     Optional. Whether the same key should not be added.
+ *                           Default false.
+ * @return int|false Meta ID on success, false on failure.
+ */
+function add_site_meta( $site_id, $meta_key, $meta_value, $unique = false ) {
+        return add_metadata( 'blog', $site_id, $meta_key, $meta_value, $unique );
+}
+/**
+ * Removes metadata matching criteria from a site.
+ *
+ * You can match based on the key, or key and value. Removing based on key and
+ * value, will keep from removing duplicate metadata with the same key. It also
+ * allows removing all metadata matching key, if needed.
+ *
+ * @since 5.1.0
+ *
+ * @param int    $site_id    Site ID.
+ * @param string $meta_key   Metadata name.
+ * @param mixed  $meta_value Optional. Metadata value. Must be serializable if
+ *                           non-scalar. Default empty.
+ * @return bool True on success, false on failure.
+ */
+function delete_site_meta( $site_id, $meta_key, $meta_value = '' ) {
+        return delete_metadata( 'blog', $site_id, $meta_key, $meta_value );
+}
+/**
+ * Retrieves metadata for a site.
+ *
+ * @since 5.1.0
+ *
+ * @param int    $site_id Site ID.
+ * @param string $key     Optional. The meta key to retrieve. By default, returns
+ *                        data for all keys. Default empty.
+ * @param bool   $single  Optional. Whether to return a single value. Default false.
+ * @return mixed Will be an array if $single is false. Will be value of meta data
+ *               field if $single is true.
+ */
+function get_site_meta( $site_id, $key = '', $single = false ) {
+        return get_metadata( 'blog', $site_id, $key, $single );
+}
+/**
+ * Updates metadata for a site.
+ *
+ * Use the $prev_value parameter to differentiate between meta fields with the
+ * same key and site ID.
+ *
+ * If the meta field for the site does not exist, it will be added.
+ *
+ * @since 5.1.0
+ *
+ * @param int    $site_id    Site ID.
+ * @param string $meta_key   Metadata key.
+ * @param mixed  $meta_value Metadata value. Must be serializable if non-scalar.
+ * @param mixed  $prev_value Optional. Previous value to check before removing.
+ *                           Default empty.
+ * @return int|bool Meta ID if the key didn't exist, true on successful update,
+ *                  false on failure.
+ */
+function update_site_meta( $site_id, $meta_key, $meta_value, $prev_value = '' ) {
+        return update_metadata( 'blog', $site_id, $meta_key, $meta_value, $prev_value );
+}
+/**
+ * Deletes everything from site meta matching meta key.
+ *
+ * @since 5.1.0
+ *
+ * @param string $meta_key Metadata key to search for when deleting.
+ * @return bool Whether the site meta key was deleted from the database.
+ */
+function delete_site_meta_by_key( $meta_key ) {
+        return delete_metadata( 'blog', null, $meta_key, '', true );
+}
+/**
+ * Updates the count of sites for a network based on a changed site.
+ *
+ * @since 5.1.0
+ *
+ * @param WP_Site      $new_site The site object that has been inserted, updated or deleted.
+ * @param WP_Site|null $old_site Optional. If $new_site has been updated, this must be the previous
+ *                               state of that site. Default null.
+ */
+function wp_maybe_update_network_site_counts_on_update( $new_site, $old_site = null ) {
+        if ( null === $old_site ) {
+                wp_maybe_update_network_site_counts( $new_site->network_id );
+                return;
+        }
+        if ( $new_site->network_id != $old_site->network_id ) {
+                wp_maybe_update_network_site_counts( $new_site->network_id );
+                wp_maybe_update_network_site_counts( $old_site->network_id );
+        }
+}
+/**
+ * Triggers actions on site status updates.
+ *
+ * @since 5.1.0
+ *
+ * @param WP_Site      $new_site The site object after the update.
+ * @param WP_Site|null $old_site Optional. If $new_site has been updated, this must be the previous
+ *                               state of that site. Default null.
+ */
+function wp_maybe_transition_site_statuses_on_update( $new_site, $old_site = null ) {
+        $site_id = $new_site->id;
+        // Use the default values for a site if no previous state is given.
+        if ( ! $old_site ) {
+                $old_site = new WP_Site( new stdClass() );
+        }
+        if ( $new_site->spam != $old_site->spam ) {
+                if ( 1 == $new_site->spam ) {
+                        /**
+                         * Fires when the 'spam' status is added to a site.
+                         *
+                         * @since MU (3.0.0)
+                         *
+                         * @param int $site_id Site ID.
+                         */
+                        do_action( 'make_spam_blog', $site_id );
+                } else {
+                        /**
+                         * Fires when the 'spam' status is removed from a site.
+                         *
+                         * @since MU (3.0.0)
+                         *
+                         * @param int $site_id Site ID.
+                         */
+                        do_action( 'make_ham_blog', $site_id );
+                }
+        }
+        if ( $new_site->mature != $old_site->mature ) {
+                if ( 1 == $new_site->mature ) {
+                        /**
+                         * Fires when the 'mature' status is added to a site.
+                         *
+                         * @since 3.1.0
+                         *
+                         * @param int $site_id Site ID.
+                         */
+                        do_action( 'mature_blog', $site_id );
+                } else {
+                        /**
+                         * Fires when the 'mature' status is removed from a site.
+                         *
+                         * @since 3.1.0
+                         *
+                         * @param int $site_id Site ID.
+                         */
+                        do_action( 'unmature_blog', $site_id );
+                }
+        }
+        if ( $new_site->archived != $old_site->archived ) {
+                if ( 1 == $new_site->archived ) {
+                        /**
+                         * Fires when the 'archived' status is added to a site.
+                         *
+                         * @since MU (3.0.0)
+                         *
+                         * @param int $site_id Site ID.
+                         */
+                        do_action( 'archive_blog', $site_id );
+                } else {
+                        /**
+                         * Fires when the 'archived' status is removed from a site.
+                         *
+                         * @since MU (3.0.0)
+                         *
+                         * @param int $site_id Site ID.
+                         */
+                        do_action( 'unarchive_blog', $site_id );
+                }
+        }
+        if ( $new_site->deleted != $old_site->deleted ) {
+                if ( 1 == $new_site->deleted ) {
+                        /**
+                         * Fires when the 'deleted' status is added to a site.
+                         *
+                         * @since 3.5.0
+                         *
+                         * @param int $site_id Site ID.
+                         */
+                        do_action( 'make_delete_blog', $site_id );
+                } else {
+                        /**
+                         * Fires when the 'deleted' status is removed from a site.
+                         *
+                         * @since 3.5.0
+                         *
+                         * @param int $site_id Site ID.
+                         */
+                        do_action( 'make_undelete_blog', $site_id );
+                }
+        }
+        if ( $new_site->public != $old_site->public ) {
+                /**
+                 * Fires after the current blog's 'public' setting is updated.
+                 *
+                 * @since MU (3.0.0)
+                 *
+                 * @param int    $site_id Site ID.
+                 * @param string $value   The value of the site status.
+                 */
+                do_action( 'update_blog_public', $site_id, $new_site->public );
+        }
+}
+/**
+ * Cleans the necessary caches after specific site data has been updated.
+ *
+ * @since 5.1.0
+ *
+ * @param WP_Site $new_site The site object after the update.
+ * @param WP_Site $old_site The site obejct prior to the update.
+ */
+function wp_maybe_clean_new_site_cache_on_update( $new_site, $old_site ) {
+        if ( $old_site->domain !== $new_site->domain || $old_site->path !== $new_site->path ) {
+                clean_blog_cache( $new_site );
+        }
+}
+/**
+ * Updates the `blog_public` option for a given site ID.
+ *
+ * @since 5.1.0
+ *
+ * @param int    $site_id Site ID.
+ * @param string $public  The value of the site status.
+ */
+function wp_update_blog_public_option_on_site_update( $site_id, $public ) {
+        // Bail if the site's database tables do not exist (yet).
+        if ( ! wp_is_site_initialized( $site_id ) ) {
+                return;
+        }
+        update_blog_option( $site_id, 'blog_public', $public );
+}
+/**
+ * Sets the last changed time for the 'sites' cache group.
+ *
+ * @since 5.1.0
+ */
+function wp_cache_set_sites_last_changed() {
+        wp_cache_set( 'last_changed', microtime(), 'sites' );
+}
+/**
+ * Aborts calls to site meta if it is not supported.
+ *
+ * @since 5.1.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param mixed $check Skip-value for whether to proceed site meta function execution.
+ * @return mixed Original value of $check, or false if site meta is not supported.
+ */
+function wp_check_site_meta_support_prefilter( $check ) {
+        if ( ! is_site_meta_supported() ) {
+                /* translators: %s: database table name */
+                _doing_it_wrong( __FUNCTION__, sprintf( __( 'The %s table is not installed. Please run the network database upgrade.' ), $GLOBALS['wpdb']->blogmeta ), '5.1.0' );
+                return false;
+        }
+        return $check;
+}

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Ticket #40647: 40647.3.diff

src/wp-includes/ms-blogs.php

src/wp-includes/ms-network.php

src/wp-includes/ms-site.php

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