<?php

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/**

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* Site/blog functions that work with the blogs table and related data.

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*

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* @package WordPress

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* @subpackage Multisite

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* @since MU (3.0.0)

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*/

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require_once ABSPATH . WPINC . '/ms-site.php';

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require_once ABSPATH . WPINC . '/ms-network.php';

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/**

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* Update the last_updated field for the current site.

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*

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* @since MU (3.0.0)

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*/

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function wpmu_update_blogs_date() {

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$site_id = get_current_blog_id();

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update_blog_details( $site_id, array( 'last_updated' => current_time( 'mysql', true ) ) );

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/**

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* Fires after the blog details are updated.

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*

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* @since MU (3.0.0)

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*

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* @param int $blog_id Site ID.

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*/

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do_action( 'wpmu_blog_updated', $site_id );

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}

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/**

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* Get a full blog URL, given a blog ID.

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*

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* @since MU (3.0.0)

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*

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* @param int $blog_id Blog ID.

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* @return string Full URL of the blog if found. Empty string if not.

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*/

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function get_blogaddress_by_id( $blog_id ) {

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$bloginfo = get_site( (int) $blog_id );

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if ( empty( $bloginfo ) ) {

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return '';

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}

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$scheme = parse_url( $bloginfo->home, PHP_URL_SCHEME );

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$scheme = empty( $scheme ) ? 'http' : $scheme;

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return esc_url( $scheme . '://' . $bloginfo->domain . $bloginfo->path );

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}

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/**

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* Get a full blog URL, given a blog name.

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*

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* @since MU (3.0.0)

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*

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* @param string $blogname The (subdomain or directory) name

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* @return string

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*/

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function get_blogaddress_by_name( $blogname ) {

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if ( is_subdomain_install() ) {

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if ( 'main' === $blogname ) {

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$blogname = 'www';

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}

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$url = rtrim( network_home_url(), '/' );

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if ( ! empty( $blogname ) ) {

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$url = preg_replace( '|^([^\.]+://)|', '${1}' . $blogname . '.', $url );

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}

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} else {

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$url = network_home_url( $blogname );

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}

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return esc_url( $url . '/' );

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}

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/**

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* Retrieves a sites ID given its (subdomain or directory) slug.

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*

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* @since MU (3.0.0)

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* @since 4.7.0 Converted to use `get_sites()`.

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*

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* @param string $slug A site's slug.

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* @return int|null The site ID, or null if no site is found for the given slug.

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*/

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function get_id_from_blogname( $slug ) {

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$current_network = get_network();

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$slug = trim( $slug, '/' );

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if ( is_subdomain_install() ) {

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$domain = $slug . '.' . preg_replace( '|^www\.|', '', $current_network->domain );

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$path = $current_network->path;

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} else {

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$domain = $current_network->domain;

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$path = $current_network->path . $slug . '/';

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}

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$site_ids = get_sites(

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array(

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'number' => 1,

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'fields' => 'ids',

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'domain' => $domain,

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'path' => $path,

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'update_site_meta_cache' => false,

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)

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);

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if ( empty( $site_ids ) ) {

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return null;

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}

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return array_shift( $site_ids );

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}

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/**

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* Retrieve the details for a blog from the blogs table and blog options.

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*

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* @since MU (3.0.0)

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*

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* @global wpdb $wpdb WordPress database abstraction object.

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*

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* @param int|string|array $fields Optional. A blog ID, a blog slug, or an array of fields to query against.

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* If not specified the current blog ID is used.

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* @param bool $get_all Whether to retrieve all details or only the details in the blogs table.

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* Default is true.

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* @return WP_Site|false Blog details on success. False on failure.

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*/

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function get_blog_details( $fields = null, $get_all = true ) {

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global $wpdb;

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if ( is_array( $fields ) ) {

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if ( isset( $fields['blog_id'] ) ) {

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$blog_id = $fields['blog_id'];

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} elseif ( isset( $fields['domain'] ) && isset( $fields['path'] ) ) {

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$key = md5( $fields['domain'] . $fields['path'] );

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$blog = wp_cache_get( $key, 'blog-lookup' );

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if ( false !== $blog ) {

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return $blog;

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}

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if ( 'www.' === substr( $fields['domain'], 0, 4 ) ) {

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$nowww = substr( $fields['domain'], 4 );

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$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain IN (%s,%s) AND path = %s ORDER BY CHAR_LENGTH(domain) DESC", $nowww, $fields['domain'], $fields['path'] ) );

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} else {

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$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain = %s AND path = %s", $fields['domain'], $fields['path'] ) );

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}

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if ( $blog ) {

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wp_cache_set( $blog->blog_id . 'short', $blog, 'blog-details' );

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$blog_id = $blog->blog_id;

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} else {

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return false;

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}

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} elseif ( isset( $fields['domain'] ) && is_subdomain_install() ) {

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$key = md5( $fields['domain'] );

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$blog = wp_cache_get( $key, 'blog-lookup' );

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if ( false !== $blog ) {

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return $blog;

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}

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if ( 'www.' === substr( $fields['domain'], 0, 4 ) ) {

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$nowww = substr( $fields['domain'], 4 );

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$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain IN (%s,%s) ORDER BY CHAR_LENGTH(domain) DESC", $nowww, $fields['domain'] ) );

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} else {

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$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain = %s", $fields['domain'] ) );

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}

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if ( $blog ) {

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wp_cache_set( $blog->blog_id . 'short', $blog, 'blog-details' );

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$blog_id = $blog->blog_id;

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} else {

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return false;

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}

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} else {

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return false;

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}

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} else {

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if ( ! $fields ) {

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$blog_id = get_current_blog_id();

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} elseif ( ! is_numeric( $fields ) ) {

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$blog_id = get_id_from_blogname( $fields );

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} else {

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$blog_id = $fields;

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}

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}

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$blog_id = (int) $blog_id;

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$all = $get_all ? '' : 'short';

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$details = wp_cache_get( $blog_id . $all, 'blog-details' );

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if ( $details ) {

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if ( ! is_object( $details ) ) {

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if ( -1 == $details ) {

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return false;

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} else {

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// Clear old pre-serialized objects. Cache clients do better with that.

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wp_cache_delete( $blog_id . $all, 'blog-details' );

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unset( $details );

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}

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} else {

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return $details;

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}

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}

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// Try the other cache.

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if ( $get_all ) {

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$details = wp_cache_get( $blog_id . 'short', 'blog-details' );

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} else {

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$details = wp_cache_get( $blog_id, 'blog-details' );

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// If short was requested and full cache is set, we can return.

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if ( $details ) {

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if ( ! is_object( $details ) ) {

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if ( -1 == $details ) {

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return false;

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} else {

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// Clear old pre-serialized objects. Cache clients do better with that.

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wp_cache_delete( $blog_id, 'blog-details' );

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unset( $details );

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}

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} else {

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return $details;

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}

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}

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}

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if ( empty( $details ) ) {

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$details = WP_Site::get_instance( $blog_id );

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if ( ! $details ) {

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// Set the full cache.

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wp_cache_set( $blog_id, -1, 'blog-details' );

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return false;

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}

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}

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if ( ! $details instanceof WP_Site ) {

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$details = new WP_Site( $details );

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}

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if ( ! $get_all ) {

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wp_cache_set( $blog_id . $all, $details, 'blog-details' );

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return $details;

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}

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$switched_blog = false;

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if ( get_current_blog_id() !== $blog_id ) {

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switch_to_blog( $blog_id );

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$switched_blog = true;

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}

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$details->blogname = get_option( 'blogname' );

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$details->siteurl = get_option( 'siteurl' );

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$details->post_count = get_option( 'post_count' );

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$details->home = get_option( 'home' );

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if ( $switched_blog ) {

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restore_current_blog();

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}

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/**

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* Filters a blog's details.

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*

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* @since MU (3.0.0)

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* @deprecated 4.7.0 Use {@see 'site_details'} instead.

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*

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* @param WP_Site $details The blog details.

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*/

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$details = apply_filters_deprecated( 'blog_details', array( $details ), '4.7.0', 'site_details' );

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wp_cache_set( $blog_id . $all, $details, 'blog-details' );

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$key = md5( $details->domain . $details->path );

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wp_cache_set( $key, $details, 'blog-lookup' );

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return $details;

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}

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/**

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* Clear the blog details cache.

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*

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* @since MU (3.0.0)

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*

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* @param int $blog_id Optional. Blog ID. Defaults to current blog.

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*/

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function refresh_blog_details( $blog_id = 0 ) {

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$blog_id = (int) $blog_id;

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if ( ! $blog_id ) {

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$blog_id = get_current_blog_id();

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}

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clean_blog_cache( $blog_id );

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}

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/**

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* Update the details for a blog. Updates the blogs table for a given blog ID.

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*

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* @since MU (3.0.0)

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*

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* @global wpdb $wpdb WordPress database abstraction object.

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*

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* @param int $blog_id Blog ID.

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* @param array $details Array of details keyed by blogs table field names.

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* @return bool True if update succeeds, false otherwise.

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*/

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function update_blog_details( $blog_id, $details = array() ) {

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global $wpdb;

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if ( empty( $details ) ) {

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return false;

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}

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if ( is_object( $details ) ) {

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$details = get_object_vars( $details );

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}

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$site = wp_update_site( $blog_id, $details );

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if ( is_wp_error( $site ) ) {

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return false;

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}

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return true;

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}

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/**

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* Cleans the site details cache for a site.

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*

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* @since 4.7.4

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*

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* @param int $site_id Optional. Site ID. Default is the current site ID.

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*/

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function clean_site_details_cache( $site_id = 0 ) {

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$site_id = (int) $site_id;

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if ( ! $site_id ) {

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$site_id = get_current_blog_id();

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}

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wp_cache_delete( $site_id, 'site-details' );

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wp_cache_delete( $site_id, 'blog-details' );

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}

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/**

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* Retrieve option value for a given blog id based on name of option.

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*

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* If the option does not exist or does not have a value, then the return value

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* will be false. This is useful to check whether you need to install an option

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* and is commonly used during installation of plugin options and to test

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* whether upgrading is required.

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*

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* If the option was serialized then it will be unserialized when it is returned.

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*

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* @since MU (3.0.0)

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*

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* @param int $id A blog ID. Can be null to refer to the current blog.

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* @param string $option Name of option to retrieve. Expected to not be SQL-escaped.

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* @param mixed $default Optional. Default value to return if the option does not exist.

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* @return mixed Value set for the option.

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*/

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function get_blog_option( $id, $option, $default = false ) {

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$id = (int) $id;

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if ( empty( $id ) ) {

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$id = get_current_blog_id();

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}

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if ( get_current_blog_id() == $id ) {

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return get_option( $option, $default );

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}

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switch_to_blog( $id );

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$value = get_option( $option, $default );

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restore_current_blog();

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/**

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* Filters a blog option value.

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*

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* The dynamic portion of the hook name, `$option`, refers to the blog option name.

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*

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* @since 3.5.0

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*

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* @param string $value The option value.

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* @param int $id Blog ID.

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*/

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return apply_filters( "blog_option_{$option}", $value, $id );

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}

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/**

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* Add a new option for a given blog ID.

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*

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* You do not need to serialize values. If the value needs to be serialized, then

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* it will be serialized before it is inserted into the database. Remember,

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* resources can not be serialized or added as an option.

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*

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* You can create options without values and then update the values later.

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* Existing options will not be updated and checks are performed to ensure that you

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* aren't adding a protected WordPress option. Care should be taken to not name

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* options the same as the ones which are protected.

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*

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* @since MU (3.0.0)

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*

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* @param int $id A blog ID. Can be null to refer to the current blog.

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* @param string $option Name of option to add. Expected to not be SQL-escaped.

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* @param mixed $value Optional. Option value, can be anything. Expected to not be SQL-escaped.

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* @return bool True if the option was added, false otherwise.

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*/

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function add_blog_option( $id, $option, $value ) {

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$id = (int) $id;

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if ( empty( $id ) ) {

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$id = get_current_blog_id();

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}

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if ( get_current_blog_id() == $id ) {

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return add_option( $option, $value );

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}

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switch_to_blog( $id );

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$return = add_option( $option, $value );

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restore_current_blog();

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return $return;

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}

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/**

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* Removes option by name for a given blog ID. Prevents removal of protected WordPress options.

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*

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* @since MU (3.0.0)

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*

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* @param int $id A blog ID. Can be null to refer to the current blog.

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* @param string $option Name of option to remove. Expected to not be SQL-escaped.

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* @return bool True if the option was deleted, false otherwise.

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*/

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function delete_blog_option( $id, $option ) {

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$id = (int) $id;

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if ( empty( $id ) ) {

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$id = get_current_blog_id();

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}

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if ( get_current_blog_id() == $id ) {

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return delete_option( $option );

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}

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switch_to_blog( $id );

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$return = delete_option( $option );

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restore_current_blog();

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return $return;

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}

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/**

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* Update an option for a particular blog.

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*

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* @since MU (3.0.0)

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*

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* @param int $id The blog ID.

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* @param string $option The option key.

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* @param mixed $value The option value.

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* @param mixed $deprecated Not used.

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* @return bool True if the value was updated, false otherwise.

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*/

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function update_blog_option( $id, $option, $value, $deprecated = null ) {

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$id = (int) $id;

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if ( null !== $deprecated ) {

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_deprecated_argument( __FUNCTION__, '3.1.0' );

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}

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if ( get_current_blog_id() == $id ) {

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return update_option( $option, $value );

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}

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switch_to_blog( $id );

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$return = update_option( $option, $value );

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restore_current_blog();

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return $return;

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}

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[475] Fix | Delete

/**

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* Switch the current blog.

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*

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* This function is useful if you need to pull posts, or other information,

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* from other blogs. You can switch back afterwards using restore_current_blog().

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*

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* Things that aren't switched:

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* - plugins. See #14941

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*

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* @see restore_current_blog()

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* @since MU (3.0.0)

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*

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* @global wpdb $wpdb WordPress database abstraction object.

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* @global int $blog_id

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* @global array $_wp_switched_stack

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* @global bool $switched

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* @global string $table_prefix

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* @global WP_Object_Cache $wp_object_cache

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*

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* @param int $new_blog_id The ID of the blog to switch to. Default: current blog.

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* @param bool $deprecated Not used.

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* @return true Always returns true.

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*/

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function switch_to_blog( $new_blog_id, $deprecated = null ) {

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