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Edit File : ms-functions.php \| Size : 89.44 KB
<?php /** * Multisite WordPress API * * @package WordPress * @subpackage Multisite * @since 3.0.0 / /* * Gets the network's site and user counts. * * @since MU (3.0.0) * * @return int[] { * Site and user count for the network. * * @type int $blogs Number of sites on the network. * @type int $users Number of users on the network. * } / function get_sitestats() { $stats = array( 'blogs' => get_blog_count(), 'users' => get_user_count(), ); return $stats; } /* * Gets one of a user's active blogs. * * Returns the user's primary blog, if they have one and * it is active. If it's inactive, function returns another * active blog of the user. If none are found, the user * is added as a Subscriber to the Dashboard Blog and that blog * is returned. * * @since MU (3.0.0) * * @param int $user_id The unique ID of the user * @return WP_Site\|void The blog object / function get_active_blog_for_user( $user_id ) { $blogs = get_blogs_of_user( $user_id ); if ( empty( $blogs ) ) { return; } if ( ! is_multisite() ) { return $blogs[ get_current_blog_id() ]; } $primary_blog = get_user_meta( $user_id, 'primary_blog', true ); $first_blog = current( $blogs ); if ( false !== $primary_blog ) { if ( ! isset( $blogs[ $primary_blog ] ) ) { update_user_meta( $user_id, 'primary_blog', $first_blog->userblog_id ); $primary = get_site( $first_blog->userblog_id ); } else { $primary = get_site( $primary_blog ); } } else { // TODO: Review this call to add_user_to_blog too - to get here the user must have a role on this blog? $result = add_user_to_blog( $first_blog->userblog_id, $user_id, 'subscriber' ); if ( ! is_wp_error( $result ) ) { update_user_meta( $user_id, 'primary_blog', $first_blog->userblog_id ); $primary = $first_blog; } } if ( ( ! is_object( $primary ) ) \|\| ( '1' === $primary->archived \|\| '1' === $primary->spam \|\| '1' === $primary->deleted ) ) { $blogs = get_blogs_of_user( $user_id, true ); // If a user's primary blog is shut down, check their other blogs. $ret = false; if ( is_array( $blogs ) && count( $blogs ) > 0 ) { $current_network_id = get_current_network_id(); foreach ( (array) $blogs as $blog_id => $blog ) { if ( $blog->site_id !== $current_network_id ) { continue; } $details = get_site( $blog_id ); if ( is_object( $details ) && '0' === $details->archived && '0' === $details->spam && '0' === $details->deleted ) { $ret = $details; if ( (int) get_user_meta( $user_id, 'primary_blog', true ) !== $blog_id ) { update_user_meta( $user_id, 'primary_blog', $blog_id ); } if ( ! get_user_meta( $user_id, 'source_domain', true ) ) { update_user_meta( $user_id, 'source_domain', $details->domain ); } break; } } } else { return; } return $ret; } else { return $primary; } } /* * Gets the number of active sites on the installation. * * The count is cached and updated twice daily. This is not a live count. * * @since MU (3.0.0) * @since 3.7.0 The `$network_id` parameter has been deprecated. * @since 4.8.0 The `$network_id` parameter is now being used. * * @param int\|null $network_id ID of the network. Default is the current network. * @return int Number of active sites on the network. / function get_blog_count( $network_id = null ) { return get_network_option( $network_id, 'blog_count' ); } /* * Gets a blog post from any site on the network. * * This function is similar to get_post(), except that it can retrieve a post * from any site on the network, not just the current site. * * @since MU (3.0.0) * * @param int $blog_id ID of the blog. * @param int $post_id ID of the post being looked for. * @return WP_Post\|null WP_Post object on success, null on failure / function get_blog_post( $blog_id, $post_id ) { switch_to_blog( $blog_id ); $post = get_post( $post_id ); restore_current_blog(); return $post; } /* * Adds a user to a blog, along with specifying the user's role. * * Use the {@see 'add_user_to_blog'} action to fire an event when users are added to a blog. * * @since MU (3.0.0) * * @param int $blog_id ID of the blog the user is being added to. * @param int $user_id ID of the user being added. * @param string $role User role. * @return true\|WP_Error True on success or a WP_Error object if the user doesn't exist * or could not be added. / function add_user_to_blog( $blog_id, $user_id, $role ) { switch_to_blog( $blog_id ); $user = get_userdata( $user_id ); if ( ! $user ) { restore_current_blog(); return new WP_Error( 'user_does_not_exist', __( 'The requested user does not exist.' ) ); } /* * Filters whether a user should be added to a site. * * @since 4.9.0 * * @param true\|WP_Error $retval True if the user should be added to the site, error * object otherwise. * @param int $user_id User ID. * @param string $role User role. * @param int $blog_id Site ID. / $can_add_user = apply_filters( 'can_add_user_to_blog', true, $user_id, $role, $blog_id ); if ( true !== $can_add_user ) { restore_current_blog(); if ( is_wp_error( $can_add_user ) ) { return $can_add_user; } return new WP_Error( 'user_cannot_be_added', __( 'User cannot be added to this site.' ) ); } if ( ! get_user_meta( $user_id, 'primary_blog', true ) ) { update_user_meta( $user_id, 'primary_blog', $blog_id ); $site = get_site( $blog_id ); update_user_meta( $user_id, 'source_domain', $site->domain ); } $user->set_role( $role ); /* * Fires immediately after a user is added to a site. * * @since MU (3.0.0) * * @param int $user_id User ID. * @param string $role User role. * @param int $blog_id Blog ID. / do_action( 'add_user_to_blog', $user_id, $role, $blog_id ); clean_user_cache( $user_id ); wp_cache_delete( $blog_id . '_user_count', 'blog-details' ); restore_current_blog(); return true; } /* * Removes a user from a blog. * * Use the {@see 'remove_user_from_blog'} action to fire an event when * users are removed from a blog. * * Accepts an optional `$reassign` parameter, if you want to * reassign the user's blog posts to another user upon removal. * * @since MU (3.0.0) * * @global wpdb $wpdb WordPress database abstraction object. * * @param int $user_id ID of the user being removed. * @param int $blog_id Optional. ID of the blog the user is being removed from. Default 0. * @param int $reassign Optional. ID of the user to whom to reassign posts. Default 0. * @return true\|WP_Error True on success or a WP_Error object if the user doesn't exist. / function remove_user_from_blog( $user_id, $blog_id = 0, $reassign = 0 ) { global $wpdb; $user_id = (int) $user_id; $blog_id = (int) $blog_id; switch_to_blog( $blog_id ); /* * Fires before a user is removed from a site. * * @since MU (3.0.0) * @since 5.4.0 Added the `$reassign` parameter. * * @param int $user_id ID of the user being removed. * @param int $blog_id ID of the blog the user is being removed from. * @param int $reassign ID of the user to whom to reassign posts. / do_action( 'remove_user_from_blog', $user_id, $blog_id, $reassign ); / * If being removed from the primary blog, set a new primary * if the user is assigned to multiple blogs. / $primary_blog = (int) get_user_meta( $user_id, 'primary_blog', true ); if ( $primary_blog === $blog_id ) { $new_id = ''; $new_domain = ''; $blogs = get_blogs_of_user( $user_id ); foreach ( (array) $blogs as $blog ) { if ( $blog->userblog_id === $blog_id ) { continue; } $new_id = $blog->userblog_id; $new_domain = $blog->domain; break; } update_user_meta( $user_id, 'primary_blog', $new_id ); update_user_meta( $user_id, 'source_domain', $new_domain ); } $user = get_userdata( $user_id ); if ( ! $user ) { restore_current_blog(); return new WP_Error( 'user_does_not_exist', __( 'That user does not exist.' ) ); } $user->remove_all_caps(); $blogs = get_blogs_of_user( $user_id ); if ( count( $blogs ) === 0 ) { update_user_meta( $user_id, 'primary_blog', '' ); update_user_meta( $user_id, 'source_domain', '' ); } if ( $reassign ) { $reassign = (int) $reassign; $post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d", $user_id ) ); $link_ids = $wpdb->get_col( $wpdb->prepare( "SELECT link_id FROM $wpdb->links WHERE link_owner = %d", $user_id ) ); if ( ! empty( $post_ids ) ) { $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET post_author = %d WHERE post_author = %d", $reassign, $user_id ) ); array_walk( $post_ids, 'clean_post_cache' ); } if ( ! empty( $link_ids ) ) { $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->links SET link_owner = %d WHERE link_owner = %d", $reassign, $user_id ) ); array_walk( $link_ids, 'clean_bookmark_cache' ); } } clean_user_cache( $user_id ); restore_current_blog(); return true; } /* * Gets the permalink for a post on another blog. * * @since MU (3.0.0) 1.0 * * @param int $blog_id ID of the source blog. * @param int $post_id ID of the desired post. * @return string The post's permalink. / function get_blog_permalink( $blog_id, $post_id ) { switch_to_blog( $blog_id ); $link = get_permalink( $post_id ); restore_current_blog(); return $link; } /* * Gets a blog's numeric ID from its URL. * * On a subdirectory installation like example.com/blog1/, * $domain will be the root 'example.com' and $path the * subdirectory '/blog1/'. With subdomains like blog1.example.com, * $domain is 'blog1.example.com' and $path is '/'. * * @since MU (3.0.0) * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $domain Website domain. * @param string $path Optional. Not required for subdomain installations. Default '/'. * @return int 0 if no blog found, otherwise the ID of the matching blog. / function get_blog_id_from_url( $domain, $path = '/' ) { $domain = strtolower( $domain ); $path = strtolower( $path ); $id = wp_cache_get( md5( $domain . $path ), 'blog-id-cache' ); if ( -1 === $id ) { // Blog does not exist. return 0; } elseif ( $id ) { return (int) $id; } $args = array( 'domain' => $domain, 'path' => $path, 'fields' => 'ids', 'number' => 1, 'update_site_meta_cache' => false, ); $result = get_sites( $args ); $id = array_shift( $result ); if ( ! $id ) { wp_cache_set( md5( $domain . $path ), -1, 'blog-id-cache' ); return 0; } wp_cache_set( md5( $domain . $path ), $id, 'blog-id-cache' ); return $id; } // // Admin functions. // /* * Checks an email address against a list of banned domains. * * This function checks against the Banned Email Domains list * at wp-admin/network/settings.php. The check is only run on * self-registrations; user creation at wp-admin/network/users.php * bypasses this check. * * @since MU (3.0.0) * * @param string $user_email The email provided by the user at registration. * @return bool True when the email address is banned, false otherwise. / function is_email_address_unsafe( $user_email ) { $banned_names = get_site_option( 'banned_email_domains' ); if ( $banned_names && ! is_array( $banned_names ) ) { $banned_names = explode( "\n", $banned_names ); } $is_email_address_unsafe = false; if ( $banned_names && is_array( $banned_names ) && false !== strpos( $user_email, '@', 1 ) ) { $banned_names = array_map( 'strtolower', $banned_names ); $normalized_email = strtolower( $user_email ); list( $email_local_part, $email_domain ) = explode( '@', $normalized_email ); foreach ( $banned_names as $banned_domain ) { if ( ! $banned_domain ) { continue; } if ( $email_domain === $banned_domain ) { $is_email_address_unsafe = true; break; } if ( str_ends_with( $normalized_email, ".$banned_domain" ) ) { $is_email_address_unsafe = true; break; } } } /* * Filters whether an email address is unsafe. * * @since 3.5.0 * * @param bool $is_email_address_unsafe Whether the email address is "unsafe". Default false. * @param string $user_email User email address. / return apply_filters( 'is_email_address_unsafe', $is_email_address_unsafe, $user_email ); } /* * Sanitizes and validates data required for a user sign-up. * * Verifies the validity and uniqueness of user names and user email addresses, * and checks email addresses against allowed and disallowed domains provided by * administrators. * * The {@see 'wpmu_validate_user_signup'} hook provides an easy way to modify the sign-up * process. The value $result, which is passed to the hook, contains both the user-provided * info and the error messages created by the function. {@see 'wpmu_validate_user_signup'} * allows you to process the data in any way you'd like, and unset the relevant errors if * necessary. * * @since MU (3.0.0) * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $user_name The login name provided by the user. * @param string $user_email The email provided by the user. * @return array { * The array of user name, email, and the error messages. * * @type string $user_name Sanitized and unique username. * @type string $orig_username Original username. * @type string $user_email User email address. * @type WP_Error $errors WP_Error object containing any errors found. * } / function wpmu_validate_user_signup( $user_name, $user_email ) { global $wpdb; $errors = new WP_Error(); $orig_username = $user_name; $user_name = preg_replace( '/\s+/', '', sanitize_user( $user_name, true ) ); if ( $user_name !== $orig_username \|\| preg_match( '/[^a-z0-9]/', $user_name ) ) { $errors->add( 'user_name', __( 'Usernames can only contain lowercase letters (a-z) and numbers.' ) ); $user_name = $orig_username; } $user_email = sanitize_email( $user_email ); if ( empty( $user_name ) ) { $errors->add( 'user_name', __( 'Please enter a username.' ) ); } $illegal_names = get_site_option( 'illegal_names' ); if ( ! is_array( $illegal_names ) ) { $illegal_names = array( 'www', 'web', 'root', 'admin', 'main', 'invite', 'administrator' ); add_site_option( 'illegal_names', $illegal_names ); } if ( in_array( $user_name, $illegal_names, true ) ) { $errors->add( 'user_name', __( 'Sorry, that username is not allowed.' ) ); } /* This filter is documented in wp-includes/user.php / $illegal_logins = (array) apply_filters( 'illegal_user_logins', array() ); if ( in_array( strtolower( $user_name ), array_map( 'strtolower', $illegal_logins ), true ) ) { $errors->add( 'user_name', __( 'Sorry, that username is not allowed.' ) ); } if ( ! is_email( $user_email ) ) { $errors->add( 'user_email', __( 'Please enter a valid email address.' ) ); } elseif ( is_email_address_unsafe( $user_email ) ) { $errors->add( 'user_email', __( 'You cannot use that email address to signup. There are problems with them blocking some emails from WordPress. Please use another email provider.' ) ); } if ( strlen( $user_name ) < 4 ) { $errors->add( 'user_name', __( 'Username must be at least 4 characters.' ) ); } if ( strlen( $user_name ) > 60 ) { $errors->add( 'user_name', __( 'Username may not be longer than 60 characters.' ) ); } // All numeric? if ( preg_match( '/^[0-9]$/', $user_name ) ) { $errors->add( 'user_name', __( 'Sorry, usernames must have letters too!' ) ); } $limited_email_domains = get_site_option( 'limited_email_domains' ); if ( is_array( $limited_email_domains ) && ! empty( $limited_email_domains ) ) { $limited_email_domains = array_map( 'strtolower', $limited_email_domains ); $email_domain = strtolower( substr( $user_email, 1 + strpos( $user_email, '@' ) ) ); if ( ! in_array( $email_domain, $limited_email_domains, true ) ) { $errors->add( 'user_email', __( 'Sorry, that email address is not allowed!' ) ); } } // Check if the username has been used already. if ( username_exists( $user_name ) ) { $errors->add( 'user_name', __( 'Sorry, that username already exists!' ) ); } // Check if the email address has been used already. if ( email_exists( $user_email ) ) { $errors->add( 'user_email', sprintf( /* translators: %s: Link to the login page. / __( '<strong>Error:</strong> This email address is already registered. <a href="%s">Log in</a> with this address or choose another one.' ), wp_login_url() ) ); } // Has someone already signed up for this username? $signup = $wpdb->get_row( $wpdb->prepare( "SELECT FROM $wpdb->signups WHERE user_login = %s", $user_name ) ); if ( $signup instanceof stdClass ) { $registered_at = mysql2date( 'U', $signup->registered ); $now = time(); $diff = $now - $registered_at; // If registered more than two days ago, cancel registration and let this signup go through. if ( $diff > 2 * DAY_IN_SECONDS ) { $wpdb->delete( $wpdb->signups, array( 'user_login' => $user_name ) ); } else { $errors->add( 'user_name', __( 'That username is currently reserved but may be available in a couple of days.' ) ); } } $signup = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->signups WHERE user_email = %s", $user_email ) ); if ( $signup instanceof stdClass ) { $diff = time() - mysql2date( 'U', $signup->registered ); // If registered more than two days ago, cancel registration and let this signup go through. if ( $diff > 2 * DAY_IN_SECONDS ) { $wpdb->delete( $wpdb->signups, array( 'user_email' => $user_email ) ); } else { $errors->add( 'user_email', __( 'That email address has already been used. Please check your inbox for an activation email. It will become available in a couple of days if you do nothing.' ) ); } } $result = array( 'user_name' => $user_name, 'orig_username' => $orig_username, 'user_email' => $user_email, 'errors' => $errors, ); /** * Filters the validated user registration details. * * This does not allow you to override the username or email of the user during * registration. The values are solely used for validation and error handling. * * @since MU (3.0.0) * * @param array $result { * The array of user name, email, and the error messages. * * @type string $user_name Sanitized and unique username. * @type string $orig_username Original username. * @type string $user_email User email address. * @type WP_Error $errors WP_Error object containing any errors found. * } / return apply_filters( 'wpmu_validate_user_signup', $result ); } /* * Processes new site registrations. * * Checks the data provided by the user during blog signup. Verifies * the validity and uniqueness of blog paths and domains. * * This function prevents the current user from registering a new site * with a blogname equivalent to another user's login name. Passing the * $user parameter to the function, where $user is the other user, is * effectively an override of this limitation. * * Filter {@see 'wpmu_validate_blog_signup'} if you want to modify * the way that WordPress validates new site signups. * * @since MU (3.0.0) * * @global wpdb $wpdb WordPress database abstraction object. * @global string $domain * * @param string $blogname The site name provided by the user. Must be unique. * @param string $blog_title The site title provided by the user. * @param WP_User\|string $user Optional. The user object to check against the new site name. * Default empty string. * @return array { * Array of domain, path, site name, site title, user and error messages. * * @type string $domain Domain for the site. * @type string $path Path for the site. Used in subdirectory installations. * @type string $blogname The unique site name (slug). * @type string $blog_title Blog title. * @type string\|WP_User $user By default, an empty string. A user object if provided. * @type WP_Error $errors WP_Error containing any errors found. * } / function wpmu_validate_blog_signup( $blogname, $blog_title, $user = '' ) { global $wpdb, $domain; $current_network = get_network(); $base = $current_network->path; $blog_title = strip_tags( $blog_title ); $errors = new WP_Error(); $illegal_names = get_site_option( 'illegal_names' ); if ( ! is_array( $illegal_names ) ) { $illegal_names = array( 'www', 'web', 'root', 'admin', 'main', 'invite', 'administrator' ); add_site_option( 'illegal_names', $illegal_names ); } / * On sub dir installations, some names are so illegal, only a filter can * spring them from jail. / if ( ! is_subdomain_install() ) { $illegal_names = array_merge( $illegal_names, get_subdirectory_reserved_names() ); } if ( empty( $blogname ) ) { $errors->add( 'blogname', __( 'Please enter a site name.' ) ); } if ( preg_match( '/[^a-z0-9]+/', $blogname ) ) { $errors->add( 'blogname', __( 'Site names can only contain lowercase letters (a-z) and numbers.' ) ); } if ( in_array( $blogname, $illegal_names, true ) ) { $errors->add( 'blogname', __( 'That name is not allowed.' ) ); } /* * Filters the minimum site name length required when validating a site signup. * * @since 4.8.0 * * @param int $length The minimum site name length. Default 4. / $minimum_site_name_length = apply_filters( 'minimum_site_name_length', 4 ); if ( strlen( $blogname ) < $minimum_site_name_length ) { / translators: %s: Minimum site name length. / $errors->add( 'blogname', sprintf( _n( 'Site name must be at least %s character.', 'Site name must be at least %s characters.', $minimum_site_name_length ), number_format_i18n( $minimum_site_name_length ) ) ); } // Do not allow users to create a site that conflicts with a page on the main blog. if ( ! is_subdomain_install() && $wpdb->get_var( $wpdb->prepare( 'SELECT post_name FROM ' . $wpdb->get_blog_prefix( $current_network->site_id ) . "posts WHERE post_type = 'page' AND post_name = %s", $blogname ) ) ) { $errors->add( 'blogname', __( 'Sorry, you may not use that site name.' ) ); } // All numeric? if ( preg_match( '/^[0-9]$/', $blogname ) ) { $errors->add( 'blogname', __( 'Sorry, site names must have letters too!' ) ); } /** * Filters the new site name during registration. * * The name is the site's subdomain or the site's subdirectory * path depending on the network settings. * * @since MU (3.0.0) * * @param string $blogname Site name. / $blogname = apply_filters( 'newblogname', $blogname ); $blog_title = wp_unslash( $blog_title ); if ( empty( $blog_title ) ) { $errors->add( 'blog_title', __( 'Please enter a site title.' ) ); } // Check if the domain/path has been used already. if ( is_subdomain_install() ) { $mydomain = $blogname . '.' . preg_replace( '\|^www\.\|', '', $domain ); $path = $base; } else { $mydomain = $domain; $path = $base . $blogname . '/'; } if ( domain_exists( $mydomain, $path, $current_network->id ) ) { $errors->add( 'blogname', __( 'Sorry, that site already exists!' ) ); } / * Do not allow users to create a site that matches an existing user's login name, * unless it's the user's own username. / if ( username_exists( $blogname ) ) { if ( ! is_object( $user ) \|\| ( is_object( $user ) && $user->user_login !== $blogname ) ) { $errors->add( 'blogname', __( 'Sorry, that site is reserved!' ) ); } } / * Has someone already signed up for this domain? * TODO: Check email too? / $signup = $wpdb->get_row( $wpdb->prepare( "SELECT FROM $wpdb->signups WHERE domain = %s AND path = %s", $mydomain, $path ) ); if ( $signup instanceof stdClass ) { $diff = time() - mysql2date( 'U', $signup->registered ); // If registered more than two days ago, cancel registration and let this signup go through. if ( $diff > 2 * DAY_IN_SECONDS ) { $wpdb->delete( $wpdb->signups, array( 'domain' => $mydomain, 'path' => $path, ) ); } else { $errors->add( 'blogname', __( 'That site is currently reserved but may be available in a couple days.' ) ); } } $result = array( 'domain' => $mydomain, 'path' => $path, 'blogname' => $blogname, 'blog_title' => $blog_title, 'user' => $user, 'errors' => $errors, ); /** * Filters site details and error messages following registration. * * @since MU (3.0.0) * * @param array $result { * Array of domain, path, site name, site title, user and error messages. * * @type string $domain Domain for the site. * @type string $path Path for the site. Used in subdirectory installations. * @type string $blogname The unique site name (slug). * @type string $blog_title Site title. * @type string\|WP_User $user By default, an empty string. A user object if provided. * @type WP_Error $errors WP_Error containing any errors found. * } / return apply_filters( 'wpmu_validate_blog_signup', $result ); } /* * Records site signup information for future activation. * * @since MU (3.0.0) * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $domain The requested domain. * @param string $path The requested path. * @param string $title The requested site title. * @param string $user The user's requested login name. * @param string $user_email The user's email address. * @param array $meta Optional. Signup meta data. By default, contains the requested privacy setting and lang_id. / function wpmu_signup_blog( $domain, $path, $title, $user, $user_email, $meta = array() ) { global $wpdb; $key = substr( md5( time() . wp_rand() . $domain ), 0, 16 ); /* * Filters the metadata for a site signup. * * The metadata will be serialized prior to storing it in the database. * * @since 4.8.0 * * @param array $meta Signup meta data. Default empty array. * @param string $domain The requested domain. * @param string $path The requested path. * @param string $title The requested site title. * @param string $user The user's requested login name. * @param string $user_email The user's email address. * @param string $key The user's activation key. / $meta = apply_filters( 'signup_site_meta', $meta, $domain, $path, $title, $user, $user_email, $key ); $wpdb->insert( $wpdb->signups, array( 'domain' => $domain, 'path' => $path, 'title' => $title, 'user_login' => $user, 'user_email' => $user_email, 'registered' => current_time( 'mysql', true ), 'activation_key' => $key, 'meta' => serialize( $meta ), ) ); /* * Fires after site signup information has been written to the database. * * @since 4.4.0 * * @param string $domain The requested domain. * @param string $path The requested path. * @param string $title The requested site title. * @param string $user The user's requested login name. * @param string $user_email The user's email address. * @param string $key The user's activation key. * @param array $meta Signup meta data. By default, contains the requested privacy setting and lang_id. / do_action( 'after_signup_site', $domain, $path, $title, $user, $user_email, $key, $meta ); } /* * Records user signup information for future activation. * * This function is used when user registration is open but * new site registration is not. * * @since MU (3.0.0) * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $user The user's requested login name. * @param string $user_email The user's email address. * @param array $meta Optional. Signup meta data. Default empty array. / function wpmu_signup_user( $user, $user_email, $meta = array() ) { global $wpdb; // Format data. $user = preg_replace( '/\s+/', '', sanitize_user( $user, true ) ); $user_email = sanitize_email( $user_email ); $key = substr( md5( time() . wp_rand() . $user_email ), 0, 16 ); /* * Filters the metadata for a user signup. * * The metadata will be serialized prior to storing it in the database. * * @since 4.8.0 * * @param array $meta Signup meta data. Default empty array. * @param string $user The user's requested login name. * @param string $user_email The user's email address. * @param string $key The user's activation key. / $meta = apply_filters( 'signup_user_meta', $meta, $user, $user_email, $key ); $wpdb->insert( $wpdb->signups, array( 'domain' => '', 'path' => '', 'title' => '', 'user_login' => $user, 'user_email' => $user_email, 'registered' => current_time( 'mysql', true ), 'activation_key' => $key, 'meta' => serialize( $meta ), ) ); /* * Fires after a user's signup information has been written to the database. * * @since 4.4.0 * * @param string $user The user's requested login name. * @param string $user_email The user's email address. * @param string $key The user's activation key. * @param array $meta Signup meta data. Default empty array. / do_action( 'after_signup_user', $user, $user_email, $key, $meta ); } /* * Sends a confirmation request email to a user when they sign up for a new site. The new site will not become active * until the confirmation link is clicked. * * This is the notification function used when site registration * is enabled. * * Filter {@see 'wpmu_signup_blog_notification'} to bypass this function or * replace it with your own notification behavior. * * Filter {@see 'wpmu_signup_blog_notification_email'} and * {@see 'wpmu_signup_blog_notification_subject'} to change the content * and subject line of the email sent to newly registered users. * * @since MU (3.0.0) * * @param string $domain The new blog domain. * @param string $path The new blog path. * @param string $title The site title. * @param string $user_login The user's login name. * @param string $user_email The user's email address. * @param string $key The activation key created in wpmu_signup_blog(). * @param array $meta Optional. Signup meta data. By default, contains the requested privacy setting and lang_id. * @return bool / function wpmu_signup_blog_notification( $domain, $path, $title, $user_login, $user_email, #[\SensitiveParameter] $key, $meta = array() ) { /* * Filters whether to bypass the new site email notification. * * @since MU (3.0.0) * * @param string\|false $domain Site domain, or false to prevent the email from sending. * @param string $path Site path. * @param string $title Site title. * @param string $user_login User login name. * @param string $user_email User email address. * @param string $key Activation key created in wpmu_signup_blog(). * @param array $meta Signup meta data. By default, contains the requested privacy setting and lang_id. / if ( ! apply_filters( 'wpmu_signup_blog_notification', $domain, $path, $title, $user_login, $user_email, $key, $meta ) ) { return false; } // Send email with activation link. if ( ! is_subdomain_install() \|\| get_current_network_id() !== 1 ) { $activate_url = network_site_url( "wp-activate.php?key=$key" ); } else { $activate_url = "http://{$domain}{$path}wp-activate.php?key=$key"; // @todo Use _url() API. } $activate_url = esc_url( $activate_url ); $admin_email = get_site_option( 'admin_email' ); if ( '' === $admin_email ) { $admin_email = 'support@' . wp_parse_url( network_home_url(), PHP_URL_HOST ); } $from_name = ( '' !== get_site_option( 'site_name' ) ) ? esc_html( get_site_option( 'site_name' ) ) : 'WordPress'; $message_headers = "From: \"{$from_name}\" <{$admin_email}>\n" . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n"; $user = get_user_by( 'login', $user_login ); $switched_locale = $user && switch_to_user_locale( $user->ID ); $message = sprintf( /** * Filters the message content of the new blog notification email. * * Content should be formatted for transmission via wp_mail(). * * @since MU (3.0.0) * * @param string $content Content of the notification email. * @param string $domain Site domain. * @param string $path Site path. * @param string $title Site title. * @param string $user_login User login name. * @param string $user_email User email address. * @param string $key Activation key created in wpmu_signup_blog(). * @param array $meta Signup meta data. By default, contains the requested privacy setting and lang_id. / apply_filters( 'wpmu_signup_blog_notification_email', / translators: New site notification email. 1: Activation URL, 2: New site URL. / __( "To activate your site, please click the following link:\n\n%1\$s\n\nAfter you activate, you will receive another email* with your login.\n\nAfter you activate, you can visit your site here:\n\n%2\$s" ), $domain, $path, $title, $user_login, $user_email, $key, $meta ), $activate_url, esc_url( "http://{$domain}{$path}" ), $key ); $subject = sprintf( /** * Filters the subject of the new blog notification email. * * @since MU (3.0.0) * * @param string $subject Subject of the notification email. * @param string $domain Site domain. * @param string $path Site path. * @param string $title Site title. * @param string $user_login User login name. * @param string $user_email User email address. * @param string $key Activation key created in wpmu_signup_blog(). * @param array $meta Signup meta data. By default, contains the requested privacy setting and lang_id. / apply_filters( 'wpmu_signup_blog_notification_subject', / translators: New site notification email subject. 1: Network title, 2: New site URL. / _x( '[%1$s] Activate %2$s', 'New site notification email subject' ), $domain, $path, $title, $user_login, $user_email, $key, $meta ), $from_name, esc_url( 'http://' . $domain . $path ) ); wp_mail( $user_email, wp_specialchars_decode( $subject ), $message, $message_headers ); if ( $switched_locale ) { restore_previous_locale(); } return true; } /* * Sends a confirmation request email to a user when they sign up for a new user account (without signing up for a site * at the same time). The user account will not become active until the confirmation link is clicked. * * This is the notification function used when no new site has * been requested. * * Filter {@see 'wpmu_signup_user_notification'} to bypass this function or * replace it with your own notification behavior. * * Filter {@see 'wpmu_signup_user_notification_email'} and * {@see 'wpmu_signup_user_notification_subject'} to change the content * and subject line of the email sent to newly registered users. * * @since MU (3.0.0) * * @param string $user_login The user's login name. * @param string $user_email The user's email address. * @param string $key The activation key created in wpmu_signup_user() * @param array $meta Optional. Signup meta data. Default empty array. * @return bool / function wpmu_signup_user_notification( $user_login, $user_email, #[\SensitiveParameter] $key, $meta = array() ) { /* * Filters whether to bypass the email notification for new user sign-up. * * @since MU (3.0.0) * * @param string $user_login User login name. * @param string $user_email User email address. * @param string $key Activation key created in wpmu_signup_user(). * @param array $meta Signup meta data. Default empty array. / if ( ! apply_filters( 'wpmu_signup_user_notification', $user_login, $user_email, $key, $meta ) ) { return false; } $user = get_user_by( 'login', $user_login ); $switched_locale = $user && switch_to_user_locale( $user->ID ); // Send email with activation link. $admin_email = get_site_option( 'admin_email' ); if ( '' === $admin_email ) { $admin_email = 'support@' . wp_parse_url( network_home_url(), PHP_URL_HOST ); } $from_name = ( '' !== get_site_option( 'site_name' ) ) ? esc_html( get_site_option( 'site_name' ) ) : 'WordPress'; $message_headers = "From: \"{$from_name}\" <{$admin_email}>\n" . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n"; $message = sprintf( /* * Filters the content of the notification email for new user sign-up. * * Content should be formatted for transmission via wp_mail(). * * @since MU (3.0.0) * * @param string $content Content of the notification email. * @param string $user_login User login name. * @param string $user_email User email address. * @param string $key Activation key created in wpmu_signup_user(). * @param array $meta Signup meta data. Default empty array. / apply_filters( 'wpmu_signup_user_notification_email', / translators: New user notification email. %s: Activation URL. / __( "To activate your user, please click the following link:\n\n%s\n\nAfter you activate, you will receive another email* with your login." ), $user_login, $user_email, $key, $meta ), site_url( "wp-activate.php?key=$key" ) ); $subject = sprintf( /** * Filters the subject of the notification email of new user signup. * * @since MU (3.0.0) * * @param string $subject Subject of the notification email. * @param string $user_login User login name. * @param string $user_email User email address. * @param string $key Activation key created in wpmu_signup_user(). * @param array $meta Signup meta data. Default empty array. / apply_filters( 'wpmu_signup_user_notification_subject', / translators: New user notification email subject. 1: Network title, 2: New user login. / _x( '[%1$s] Activate %2$s', 'New user notification email subject' ), $user_login, $user_email, $key, $meta ), $from_name, $user_login ); wp_mail( $user_email, wp_specialchars_decode( $subject ), $message, $message_headers ); if ( $switched_locale ) { restore_previous_locale(); } return true; } /* * Activates a signup. * * Hook to {@see 'wpmu_activate_user'} or {@see 'wpmu_activate_blog'} for events * that should happen only when users or sites are self-created (since * those actions are not called when users and sites are created * by a Super Admin). * * @since MU (3.0.0) * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $key The activation key provided to the user. * @return array\|WP_Error An array containing information about the activated user and/or blog. / function wpmu_activate_signup( #[\SensitiveParameter] $key ) { global $wpdb; $signup = $wpdb->get_row( $wpdb->prepare( "SELECT FROM $wpdb->signups WHERE activation_key = %s", $key ) ); if ( empty( $signup ) ) { return new WP_Error( 'invalid_key', __( 'Invalid activation key.' ) ); } if ( $signup->active ) { if ( empty( $signup->domain ) ) { return new WP_Error( 'already_active', __( 'The user is already active.' ), $signup ); } else { return new WP_Error( 'already_active', __( 'The site is already active.' ), $signup ); } } $meta = maybe_unserialize( $signup->meta ); $password = wp_generate_password( 12, false ); $user_id = username_exists( $signup->user_login ); if ( ! $user_id ) { $user_id = wpmu_create_user( $signup->user_login, $password, $signup->user_email ); } else { $user_already_exists = true; } if ( ! $user_id ) { return new WP_Error( 'create_user', __( 'Could not create user' ), $signup ); } $now = current_time( 'mysql', true ); if ( empty( $signup->domain ) ) { $wpdb->update( $wpdb->signups, array( 'active' => 1, 'activated' => $now, ), array( 'activation_key' => $key ) ); if ( isset( $user_already_exists ) ) { return new WP_Error( 'user_already_exists', __( 'That username is already activated.' ), $signup ); } /** * Fires immediately after a new user is activated. * * @since MU (3.0.0) * * @param int $user_id User ID. * @param string $password User password. * @param array $meta Signup meta data. / do_action( 'wpmu_activate_user', $user_id, $password, $meta ); return array( 'user_id' => $user_id, 'password' => $password, 'meta' => $meta, ); } $blog_id = wpmu_create_blog( $signup->domain, $signup->path, $signup->title, $user_id, $meta, get_current_network_id() ); // TODO: What to do if we create a user but cannot create a blog? if ( is_wp_error( $blog_id ) ) { / * If blog is taken, that means a previous attempt to activate this blog * failed in between creating the blog and setting the activation flag. * Let's just set the active flag and instruct the user to reset their password. / if ( 'blog_taken' === $blog_id->get_error_code() ) { $blog_id->add_data( $signup ); $wpdb->update( $wpdb->signups, array( 'active' => 1, 'activated' => $now, ), array( 'activation_key' => $key ) ); } return $blog_id; } $wpdb->update( $wpdb->signups, array( 'active' => 1, 'activated' => $now, ), array( 'activation_key' => $key ) ); /* * Fires immediately after a site is activated. * * @since MU (3.0.0) * * @param int $blog_id Blog ID. * @param int $user_id User ID. * @param string $password User password. * @param string $signup_title Site title. * @param array $meta Signup meta data. By default, contains the requested privacy setting and lang_id. / do_action( 'wpmu_activate_blog', $blog_id, $user_id, $password, $signup->title, $meta ); return array( 'blog_id' => $blog_id, 'user_id' => $user_id, 'password' => $password, 'title' => $signup->title, 'meta' => $meta, ); } /* * Deletes an associated signup entry when a user is deleted from the database. * * @since 5.5.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param int $id ID of the user to delete. * @param int\|null $reassign ID of the user to reassign posts and links to. * @param WP_User $user User object. / function wp_delete_signup_on_user_delete( $id, $reassign, $user ) { global $wpdb; $wpdb->delete( $wpdb->signups, array( 'user_login' => $user->user_login ) ); } /* * Creates a user. * * This function runs when a user self-registers as well as when * a Super Admin creates a new user. Hook to {@see 'wpmu_new_user'} for events * that should affect all new users, but only on Multisite (otherwise * use {@see 'user_register'}). * * @since MU (3.0.0) * * @param string $user_name The new user's login name. * @param string $password The new user's password. * @param string $email The new user's email address. * @return int\|false Returns false on failure, or int $user_id on success. / function wpmu_create_user( $user_name, #[\SensitiveParameter] $password, $email ) { $user_name = preg_replace( '/\s+/', '', sanitize_user( $user_name, true ) ); $user_id = wp_create_user( $user_name, $password, $email ); if ( is_wp_error( $user_id ) ) { return false; } // Newly created users have no roles or caps until they are added to a blog. delete_user_option( $user_id, 'capabilities' ); delete_user_option( $user_id, 'user_level' ); /* * Fires immediately after a new user is created. * * @since MU (3.0.0) * * @param int $user_id User ID. / do_action( 'wpmu_new_user', $user_id ); return $user_id; } /* * Creates a site. * * This function runs when a user self-registers a new site as well * as when a Super Admin creates a new site. Hook to {@see 'wpmu_new_blog'} * for events that should affect all new sites. * * On subdirectory installations, $domain is the same as the main site's * domain, and the path is the subdirectory name (eg 'example.com' * and '/blog1/'). On subdomain installations, $domain is the new subdomain + * root domain (eg 'blog1.example.com'), and $path is '/'. * * @since MU (3.0.0) * * @param string $domain The new site's domain. * @param string $path The new site's path. * @param string $title The new site's title. * @param int $user_id The user ID of the new site's admin. * @param array $options Optional. Array of key=>value pairs used to set initial site options. * If valid status keys are included ('public', 'archived', 'mature', * 'spam', 'deleted', or 'lang_id') the given site status(es) will be * updated. Otherwise, keys and values will be used to set options for * the new site. Default empty array. * @param int $network_id Optional. Network ID. Only relevant on multi-network installations. * Default 1. * @return int\|WP_Error Returns WP_Error object on failure, the new site ID on success. / function wpmu_create_blog( $domain, $path, $title, $user_id, $options = array(), $network_id = 1 ) { $defaults = array( 'public' => 0, ); $options = wp_parse_args( $options, $defaults ); $title = strip_tags( $title ); $user_id = (int) $user_id; // Check if the domain has been used already. We should return an error message. if ( domain_exists( $domain, $path, $network_id ) ) { return new WP_Error( 'blog_taken', __( 'Sorry, that site already exists!' ) ); } if ( ! wp_installing() ) { wp_installing( true ); } $allowed_data_fields = array( 'public', 'archived', 'mature', 'spam', 'deleted', 'lang_id' ); $site_data = array_merge( array( 'domain' => $domain, 'path' => $path, 'network_id' => $network_id, ), array_intersect_key( $options, array_flip( $allowed_data_fields ) ) ); // Data to pass to wp_initialize_site(). $site_initialization_data = array( 'title' => $title, 'user_id' => $user_id, 'options' => array_diff_key( $options, array_flip( $allowed_data_fields ) ), ); $blog_id = wp_insert_site( array_merge( $site_data, $site_initialization_data ) ); if ( is_wp_error( $blog_id ) ) { return $blog_id; } wp_cache_set_sites_last_changed(); return $blog_id; } /* * Notifies the network admin that a new site has been activated. * * Filter {@see 'newblog_notify_siteadmin'} to change the content of * the notification email. * * @since MU (3.0.0) * @since 5.1.0 $blog_id now supports input from the {@see 'wp_initialize_site'} action. * * @param WP_Site\|int $blog_id The new site's object or ID. * @param string $deprecated Not used. * @return bool / function newblog_notify_siteadmin( $blog_id, $deprecated = '' ) { if ( is_object( $blog_id ) ) { $blog_id = $blog_id->blog_id; } if ( 'yes' !== get_site_option( 'registrationnotification' ) ) { return false; } $email = get_site_option( 'admin_email' ); if ( ! is_email( $email ) ) { return false; } $options_site_url = esc_url( network_admin_url( 'settings.php' ) ); switch_to_blog( $blog_id ); $blogname = get_option( 'blogname' ); $siteurl = site_url(); restore_current_blog(); $msg = sprintf( / translators: New site notification email. 1: Site URL, 2: User IP address, 3: URL to Network Settings screen. / __( 'New Site: %1$s URL: %2$s Remote IP address: %3$s Disable these notifications: %4$s' ), $blogname, $siteurl, wp_unslash( $_SERVER['REMOTE_ADDR'] ), $options_site_url ); /* * Filters the message body of the new site activation email sent * to the network administrator. * * @since MU (3.0.0) * @since 5.4.0 The `$blog_id` parameter was added. * * @param string $msg Email body. * @param int\|string $blog_id The new site's ID as an integer or numeric string. / $msg = apply_filters( 'newblog_notify_siteadmin', $msg, $blog_id ); / translators: New site notification email subject. %s: New site URL. / wp_mail( $email, sprintf( __( 'New Site Registration: %s' ), $siteurl ), $msg ); return true; } /* * Notifies the network admin that a new user has been activated. * * Filter {@see 'newuser_notify_siteadmin'} to change the content of * the notification email. * * @since MU (3.0.0) * * @param int $user_id The new user's ID. * @return bool / function newuser_notify_siteadmin( $user_id ) { if ( 'yes' !== get_site_option( 'registrationnotification' ) ) { return false; } $email = get_site_option( 'admin_email' ); if ( ! is_email( $email ) ) { return false; } $user = get_userdata( $user_id ); $options_site_url = esc_url( network_admin_url( 'settings.php' ) ); $msg = sprintf( / translators: New user notification email. 1: User login, 2: User IP address, 3: URL to Network Settings screen. / __( 'New User: %1$s Remote IP address: %2$s Disable these notifications: %3$s' ), $user->user_login, wp_unslash( $_SERVER['REMOTE_ADDR'] ), $options_site_url ); /* * Filters the message body of the new user activation email sent * to the network administrator. * * @since MU (3.0.0) * * @param string $msg Email body. * @param WP_User $user WP_User instance of the new user. / $msg = apply_filters( 'newuser_notify_siteadmin', $msg, $user ); / translators: New user notification email subject. %s: User login. / wp_mail( $email, sprintf( __( 'New User Registration: %s' ), $user->user_login ), $msg ); return true; } /* * Checks whether a site name is already taken. * * The name is the site's subdomain or the site's subdirectory * path depending on the network settings. * * Used during the new site registration process to ensure * that each site name is unique. * * @since MU (3.0.0) * * @param string $domain The domain to be checked. * @param string $path The path to be checked. * @param int $network_id Optional. Network ID. Only relevant on multi-network installations. * Default 1. * @return int\|null The site ID if the site name exists, null otherwise. / function domain_exists( $domain, $path, $network_id = 1 ) { $path = trailingslashit( $path ); $args = array( 'network_id' => $network_id, 'domain' => $domain, 'path' => $path, 'fields' => 'ids', 'number' => 1, 'update_site_meta_cache' => false, ); $result = get_sites( $args ); $result = array_shift( $result ); /* * Filters whether a site name is taken. * * The name is the site's subdomain or the site's subdirectory * path depending on the network settings. * * @since 3.5.0 * * @param int\|null $result The site ID if the site name exists, null otherwise. * @param string $domain Domain to be checked. * @param string $path Path to be checked. * @param int $network_id Network ID. Only relevant on multi-network installations. / return apply_filters( 'domain_exists', $result, $domain, $path, $network_id ); } /* * Notifies the site administrator that their site activation was successful. * * Filter {@see 'wpmu_welcome_notification'} to disable or bypass. * * Filter {@see 'update_welcome_email'} and {@see 'update_welcome_subject'} to * modify the content and subject line of the notification email. * * @since MU (3.0.0) * * @param int $blog_id Site ID. * @param int $user_id User ID. * @param string $password User password, or "N/A" if the user account is not new. * @param string $title Site title. * @param array $meta Optional. Signup meta data. By default, contains the requested privacy setting and lang_id. * @return bool Whether the email notification was sent. / function wpmu_welcome_notification( $blog_id, $user_id, #[\SensitiveParameter] $password, $title, $meta = array() ) { $current_network = get_network(); /* * Filters whether to bypass the welcome email sent to the site administrator after site activation. * * Returning false disables the welcome email. * * @since MU (3.0.0) * * @param int\|false $blog_id Site ID, or false to prevent the email from sending. * @param int $user_id User ID of the site administrator. * @param string $password User password, or "N/A" if the user account is not new. * @param string $title Site title. * @param array $meta Signup meta data. By default, contains the requested privacy setting and lang_id. / if ( ! apply_filters( 'wpmu_welcome_notification', $blog_id, $user_id, $password, $title, $meta ) ) { return false; } $user = get_userdata( $user_id ); $switched_locale = switch_to_user_locale( $user_id ); $welcome_email = get_site_option( 'welcome_email' ); if ( ! $welcome_email ) { / translators: Do not translate USERNAME, SITE_NAME, BLOG_URL, PASSWORD: those are placeholders. / $welcome_email = __( 'Howdy USERNAME, Your new SITE_NAME site has been successfully set up at: BLOG_URL You can log in to the administrator account with the following information: Username: USERNAME Password: PASSWORD Log in here: BLOG_URLwp-login.php We hope you enjoy your new site. Thanks! --The Team @ SITE_NAME' ); } $url = get_blogaddress_by_id( $blog_id ); $welcome_email = str_replace( 'SITE_NAME', $current_network->site_name, $welcome_email ); $welcome_email = str_replace( 'BLOG_TITLE', $title, $welcome_email ); $welcome_email = str_replace( 'BLOG_URL', $url, $welcome_email ); $welcome_email = str_replace( 'USERNAME', $user->user_login, $welcome_email ); $welcome_email = str_replace( 'PASSWORD', $password, $welcome_email ); /* * Filters the content of the welcome email sent to the site administrator after site activation. * * Content should be formatted for transmission via wp_mail(). * * @since MU (3.0.0) * * @param string $welcome_email Message body of the email. * @param int $blog_id Site ID. * @param int $user_id User ID of the site administrator. * @param string $password User password, or "N/A" if the user account is not new. * @param string $title Site title. * @param array $meta Signup meta data. By default, contains the requested privacy setting and lang_id. / $welcome_email = apply_filters( 'update_welcome_email', $welcome_email, $blog_id, $user_id, $password, $title, $meta ); $admin_email = get_site_option( 'admin_email' ); if ( '' === $admin_email ) { $admin_email = 'support@' . wp_parse_url( network_home_url(), PHP_URL_HOST ); } $from_name = ( '' !== get_site_option( 'site_name' ) ) ? esc_html( get_site_option( 'site_name' ) ) : 'WordPress'; $message_headers = "From: \"{$from_name}\" <{$admin_email}>\n" . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n"; $message = $welcome_email; if ( empty( $current_network->site_name ) ) { $current_network->site_name = 'WordPress'; } / translators: New site notification email subject. 1: Network title, 2: New site title. / $subject = __( 'New %1$s Site: %2$s' ); /* * Filters the subject of the welcome email sent to the site administrator after site activation. * * @since MU (3.0.0) * * @param string $subject Subject of the email. / $subject = apply_filters( 'update_welcome_subject', sprintf( $subject, $current_network->site_name, wp_unslash( $title ) ) ); wp_mail( $user->user_email, wp_specialchars_decode( $subject ), $message, $message_headers ); if ( $switched_locale ) { restore_previous_locale(); } return true; } /* * Notifies the Multisite network administrator that a new site was created. * * Filter {@see 'send_new_site_email'} to disable or bypass. * * Filter {@see 'new_site_email'} to filter the contents. * * @since 5.6.0 * * @param int $site_id Site ID of the new site. * @param int $user_id User ID of the administrator of the new site. * @return bool Whether the email notification was sent. / function wpmu_new_site_admin_notification( $site_id, $user_id ) { $site = get_site( $site_id ); $user = get_userdata( $user_id ); $email = get_site_option( 'admin_email' ); if ( ! $site \|\| ! $user \|\| ! $email ) { return false; } /* * Filters whether to send an email to the Multisite network administrator when a new site is created. * * Return false to disable sending the email. * * @since 5.6.0 * * @param bool $send Whether to send the email. * @param WP_Site $site Site object of the new site. * @param WP_User $user User object of the administrator of the new site. / if ( ! apply_filters( 'send_new_site_email', true, $site, $user ) ) { return false; } $switched_locale = false; $network_admin = get_user_by( 'email', $email ); if ( $network_admin ) { // If the network admin email address corresponds to a user, switch to their locale. $switched_locale = switch_to_user_locale( $network_admin->ID ); } else { // Otherwise switch to the locale of the current site. $switched_locale = switch_to_locale( get_locale() ); } $subject = sprintf( / translators: New site notification email subject. %s: Network title. / __( '[%s] New Site Created' ), get_network()->site_name ); $message = sprintf( / translators: New site notification email. 1: User login, 2: Site URL, 3: Site title. / __( 'New site created by %1$s Address: %2$s Name: %3$s' ), $user->user_login, get_site_url( $site->id ), get_blog_option( $site->id, 'blogname' ) ); $header = sprintf( 'From: "%1$s" <%2$s>', _x( 'Site Admin', 'email "From" field' ), $email ); $new_site_email = array( 'to' => $email, 'subject' => $subject, 'message' => $message, 'headers' => $header, ); /* * Filters the content of the email sent to the Multisite network administrator when a new site is created. * * Content should be formatted for transmission via wp_mail(). * * @since 5.6.0 * * @param array $new_site_email { * Used to build wp_mail(). * * @type string $to The email address of the recipient. * @type string $subject The subject of the email. * @type string $message The content of the email. * @type string $headers Headers. * } * @param WP_Site $site Site object of the new site. * @param WP_User $user User object of the administrator of the new site. / $new_site_email = apply_filters( 'new_site_email', $new_site_email, $site, $user ); wp_mail( $new_site_email['to'], wp_specialchars_decode( $new_site_email['subject'] ), $new_site_email['message'], $new_site_email['headers'] ); if ( $switched_locale ) { restore_previous_locale(); } return true; } /* * Notifies a user that their account activation has been successful. * * Filter {@see 'wpmu_welcome_user_notification'} to disable or bypass. * * Filter {@see 'update_welcome_user_email'} and {@see 'update_welcome_user_subject'} to * modify the content and subject line of the notification email. * * @since MU (3.0.0) * * @param int $user_id User ID. * @param string $password User password. * @param array $meta Optional. Signup meta data. Default empty array. * @return bool / function wpmu_welcome_user_notification( $user_id, #[\SensitiveParameter] $password, $meta = array() ) { $current_network = get_network(); /* * Filters whether to bypass the welcome email after user activation. * * Returning false disables the welcome email. * * @since MU (3.0.0) * * @param int $user_id User ID. * @param string $password User password. * @param array $meta Signup meta data. Default empty array. / if ( ! apply_filters( 'wpmu_welcome_user_notification', $user_id, $password, $meta ) ) { return false; } $welcome_email = get_site_option( 'welcome_user_email' ); $user = get_userdata( $user_id ); $switched_locale = switch_to_user_locale( $user_id ); /* * Filters the content of the welcome email after user activation. * * Content should be formatted for transmission via wp_mail(). * * @since MU (3.0.0) * * @param string $welcome_email The message body of the account activation success email. * @param int $user_id User ID. * @param string $password User password. * @param array $meta Signup meta data. Default empty array. / $welcome_email = apply_filters( 'update_welcome_user_email', $welcome_email, $user_id, $password, $meta ); $welcome_email = str_replace( 'SITE_NAME', $current_network->site_name, $welcome_email ); $welcome_email = str_replace( 'USERNAME', $user->user_login, $welcome_email ); $welcome_email = str_replace( 'PASSWORD', $password, $welcome_email ); $welcome_email = str_replace( 'LOGINLINK', wp_login_url(), $welcome_email ); $admin_email = get_site_option( 'admin_email' ); if ( '' === $admin_email ) { $admin_email = 'support@' . wp_parse_url( network_home_url(), PHP_URL_HOST ); } $from_name = ( '' !== get_site_option( 'site_name' ) ) ? esc_html( get_site_option( 'site_name' ) ) : 'WordPress'; $message_headers = "From: \"{$from_name}\" <{$admin_email}>\n" . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n"; $message = $welcome_email; if ( empty( $current_network->site_name ) ) { $current_network->site_name = 'WordPress'; } / translators: New user notification email subject. 1: Network title, 2: New user login. / $subject = __( 'New %1$s User: %2$s' ); /* * Filters the subject of the welcome email after user activation. * * @since MU (3.0.0) * * @param string $subject Subject of the email. / $subject = apply_filters( 'update_welcome_user_subject', sprintf( $subject, $current_network->site_name, $user->user_login ) ); wp_mail( $user->user_email, wp_specialchars_decode( $subject ), $message, $message_headers ); if ( $switched_locale ) { restore_previous_locale(); } return true; } /* * Gets the current network. * * Returns an object containing the 'id', 'domain', 'path', and 'site_name' * properties of the network being viewed. * * @see wpmu_current_site() * * @since MU (3.0.0) * * @global WP_Network $current_site The current network. * * @return WP_Network The current network. / function get_current_site() { global $current_site; return $current_site; } /* * Gets a user's most recent post. * * Walks through each of a user's blogs to find the post with * the most recent post_date_gmt. * * @since MU (3.0.0) * * @global wpdb $wpdb WordPress database abstraction object. * * @param int $user_id User ID. * @return array Contains the blog_id, post_id, post_date_gmt, and post_gmt_ts. / function get_most_recent_post_of_user( $user_id ) { global $wpdb; $user_blogs = get_blogs_of_user( (int) $user_id ); $most_recent_post = array(); / * Walk through each blog and get the most recent post * published by $user_id. / foreach ( (array) $user_blogs as $blog ) { $prefix = $wpdb->get_blog_prefix( $blog->userblog_id ); $recent_post = $wpdb->get_row( $wpdb->prepare( "SELECT ID, post_date_gmt FROM {$prefix}posts WHERE post_author = %d AND post_type = 'post' AND post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1", $user_id ), ARRAY_A ); // Make sure we found a post. if ( isset( $recent_post['ID'] ) ) { $post_gmt_ts = strtotime( $recent_post['post_date_gmt'] ); / * If this is the first post checked * or if this post is newer than the current recent post, * make it the new most recent post. / if ( ! isset( $most_recent_post['post_gmt_ts'] ) \|\| ( $post_gmt_ts > $most_recent_post['post_gmt_ts'] ) ) { $most_recent_post = array( 'blog_id' => $blog->userblog_id, 'post_id' => $recent_post['ID'], 'post_date_gmt' => $recent_post['post_date_gmt'], 'post_gmt_ts' => $post_gmt_ts, ); } } } return $most_recent_post; } // // Misc functions. // /* * Checks an array of MIME types against a list of allowed types. * * WordPress ships with a set of allowed upload filetypes, * which is defined in wp-includes/functions.php in * get_allowed_mime_types(). This function is used to filter * that list against the filetypes allowed provided by Multisite * Super Admins at wp-admin/network/settings.php. * * @since MU (3.0.0) * * @param array $mimes * @return array / function check_upload_mimes( $mimes ) { $site_exts = explode( ' ', get_site_option( 'upload_filetypes', 'jpg jpeg png gif' ) ); $site_mimes = array(); foreach ( $site_exts as $ext ) { foreach ( $mimes as $ext_pattern => $mime ) { if ( '' !== $ext && str_contains( $ext_pattern, $ext ) ) { $site_mimes[ $ext_pattern ] = $mime; } } } return $site_mimes; } /* * Updates a blog's post count. * * WordPress MS stores a blog's post count as an option so as * to avoid extraneous COUNTs when a blog's details are fetched * with get_site(). This function is called when posts are published * or unpublished to make sure the count stays current. * * @since MU (3.0.0) * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $deprecated Not used. / function update_posts_count( $deprecated = '' ) { global $wpdb; update_option( 'post_count', (int) $wpdb->get_var( "SELECT COUNT(ID) FROM {$wpdb->posts} WHERE post_status = 'publish' and post_type = 'post'" ), true ); } /* * Logs the user email, IP, and registration date of a new site. * * @since MU (3.0.0) * @since 5.1.0 Parameters now support input from the {@see 'wp_initialize_site'} action. * * @global wpdb $wpdb WordPress database abstraction object. * * @param WP_Site\|int $blog_id The new site's object or ID. * @param int\|array $user_id User ID, or array of arguments including 'user_id'. / function wpmu_log_new_registrations( $blog_id, $user_id ) { global $wpdb; if ( is_object( $blog_id ) ) { $blog_id = $blog_id->blog_id; } if ( is_array( $user_id ) ) { $user_id = ! empty( $user_id['user_id'] ) ? $user_id['user_id'] : 0; } $user = get_userdata( (int) $user_id ); if ( $user ) { $wpdb->insert( $wpdb->registration_log, array( 'email' => $user->user_email, 'IP' => preg_replace( '/[^0-9., ]/', '', wp_unslash( $_SERVER['REMOTE_ADDR'] ) ), 'blog_id' => $blog_id, 'date_registered' => current_time( 'mysql' ), ) ); } } /* * Ensures that the current site's domain is listed in the allowed redirect host list. * * @see wp_validate_redirect() * @since MU (3.0.0) * * @param array\|string $deprecated Not used. * @return string[] { * An array containing the current site's domain. * * @type string $0 The current site's domain. * } / function redirect_this_site( $deprecated = '' ) { return array( get_network()->domain ); } /* * Checks whether an upload is too big. * * @since MU (3.0.0) * * @param array $upload An array of information about the newly-uploaded file. * @return string\|array If the upload is under the size limit, $upload is returned. Otherwise returns an error message. / function upload_is_file_too_big( $upload ) { if ( ! is_array( $upload ) \|\| defined( 'WP_IMPORTING' ) \|\| get_site_option( 'upload_space_check_disabled' ) ) { return $upload; } if ( strlen( $upload['bits'] ) > ( KB_IN_BYTES get_site_option( 'fileupload_maxk', 1500 ) ) ) { /* translators: %s: Maximum allowed file size in kilobytes. / return sprintf( __( 'This file is too big. Files must be less than %s KB in size.' ) . '<br />', get_site_option( 'fileupload_maxk', 1500 ) ); } return $upload; } /* * Adds a nonce field to the signup page. * * @since MU (3.0.0) / function signup_nonce_fields() { $id = mt_rand(); echo "<input type='hidden' name='signup_form_id' value='{$id}' />"; wp_nonce_field( 'signup_form_' . $id, '_signup_form', false ); } /* * Processes the signup nonce created in signup_nonce_fields(). * * @since MU (3.0.0) * * @param array $result * @return array / function signup_nonce_check( $result ) { if ( ! strpos( $_SERVER['PHP_SELF'], 'wp-signup.php' ) ) { return $result; } if ( ! wp_verify_nonce( $_POST['_signup_form'], 'signup_form_' . $_POST['signup_form_id'] ) ) { $result['errors']->add( 'invalid_nonce', __( 'Unable to submit this form, please try again.' ) ); } return $result; } /* * Corrects 404 redirects when NOBLOGREDIRECT is defined. * * @since MU (3.0.0) / function maybe_redirect_404() { if ( is_main_site() && is_404() && defined( 'NOBLOGREDIRECT' ) ) { /* * Filters the redirect URL for 404s on the main site. * * The filter is only evaluated if the NOBLOGREDIRECT constant is defined. * * @since 3.0.0 * * @param string $no_blog_redirect The redirect URL defined in NOBLOGREDIRECT. / $destination = apply_filters( 'blog_redirect_404', NOBLOGREDIRECT ); if ( $destination ) { if ( '%siteurl%' === $destination ) { $destination = network_home_url(); } wp_redirect( $destination ); exit; } } } /* * Adds a new user to a blog by visiting /newbloguser/{key}/. * * This will only work when the user's details are saved as an option * keyed as 'new_user_{key}', where '{key}' is a hash generated for the user to be * added, as when a user is invited through the regular WP Add User interface. * * @since MU (3.0.0) / function maybe_add_existing_user_to_blog() { if ( ! str_contains( $_SERVER['REQUEST_URI'], '/newbloguser/' ) ) { return; } $parts = explode( '/', $_SERVER['REQUEST_URI'] ); $key = array_pop( $parts ); if ( '' === $key ) { $key = array_pop( $parts ); } $details = get_option( 'new_user_' . $key ); if ( ! empty( $details ) ) { delete_option( 'new_user_' . $key ); } if ( empty( $details ) \|\| is_wp_error( add_existing_user_to_blog( $details ) ) ) { wp_die( sprintf( / translators: %s: Home URL. / __( 'An error occurred adding you to this site. Go to the <a href="%s">homepage</a>.' ), home_url() ) ); } wp_die( sprintf( / translators: 1: Home URL, 2: Admin URL. / __( 'You have been added to this site. Please visit the <a href="%1$s">homepage</a> or <a href="%2$s">log in</a> using your username and password.' ), home_url(), admin_url() ), __( 'WordPress &rsaquo; Success' ), array( 'response' => 200 ) ); } /* * Adds a user to a blog based on details from maybe_add_existing_user_to_blog(). * * @since MU (3.0.0) * * @param array\|false $details { * User details. Must at least contain values for the keys listed below. * * @type int $user_id The ID of the user being added to the current blog. * @type string $role The role to be assigned to the user. * } * @return true\|WP_Error\|void True on success or a WP_Error object if the user doesn't exist * or could not be added. Void if $details array was not provided. / function add_existing_user_to_blog( $details = false ) { if ( is_array( $details ) ) { $blog_id = get_current_blog_id(); $result = add_user_to_blog( $blog_id, $details['user_id'], $details['role'] ); /* * Fires immediately after an existing user is added to a site. * * @since MU (3.0.0) * * @param int $user_id User ID. * @param true\|WP_Error $result True on success or a WP_Error object if the user doesn't exist * or could not be added. / do_action( 'added_existing_user', $details['user_id'], $result ); return $result; } } /* * Adds a newly created user to the appropriate blog * * To add a user in general, use add_user_to_blog(). This function * is specifically hooked into the {@see 'wpmu_activate_user'} action. * * @since MU (3.0.0) * * @see add_user_to_blog() * * @param int $user_id User ID. * @param string $password User password. Ignored. * @param array $meta Signup meta data. / function add_new_user_to_blog( $user_id, #[\SensitiveParameter] $password, $meta ) { if ( ! empty( $meta['add_to_blog'] ) ) { $blog_id = $meta['add_to_blog']; $role = $meta['new_role']; remove_user_from_blog( $user_id, get_network()->site_id ); // Remove user from main blog. $result = add_user_to_blog( $blog_id, $user_id, $role ); if ( ! is_wp_error( $result ) ) { update_user_meta( $user_id, 'primary_blog', $blog_id ); } } } /* * Corrects From host on outgoing mail to match the site domain. * * @since MU (3.0.0) * * @param PHPMailer\PHPMailer\PHPMailer $phpmailer The PHPMailer instance (passed by reference). / function fix_phpmailer_messageid( $phpmailer ) { $phpmailer->Hostname = get_network()->domain; } /* * Determines whether a user is marked as a spammer, based on user login. * * @since MU (3.0.0) * * @param string\|WP_User $user Optional. Defaults to current user. WP_User object, * or user login name as a string. * @return bool / function is_user_spammy( $user = null ) { if ( ! ( $user instanceof WP_User ) ) { if ( $user ) { $user = get_user_by( 'login', $user ); } else { $user = wp_get_current_user(); } } return $user && isset( $user->spam ) && '1' === $user->spam; } /* * Updates this blog's 'public' setting in the global blogs table. * * Public blogs have a setting of 1, private blogs are 0. * * @since MU (3.0.0) * * @param int $old_value The old public value. * @param int $value The new public value. / function update_blog_public( $old_value, $value ) { update_blog_status( get_current_blog_id(), 'public', (int) $value ); } /* * Determines whether users can self-register, based on Network settings. * * @since MU (3.0.0) * * @return bool / function users_can_register_signup_filter() { $registration = get_site_option( 'registration' ); return ( 'all' === $registration \|\| 'user' === $registration ); } /* * Ensures that the welcome message is not empty. Currently unused. * * @since MU (3.0.0) * * @param string $text * @return string / function welcome_user_msg_filter( $text ) { if ( ! $text ) { remove_filter( 'site_option_welcome_user_email', 'welcome_user_msg_filter' ); / translators: Do not translate USERNAME, PASSWORD, LOGINLINK, SITE_NAME: those are placeholders. / $text = __( 'Howdy USERNAME, Your new account is set up. You can log in with the following information: Username: USERNAME Password: PASSWORD LOGINLINK Thanks! --The Team @ SITE_NAME' ); update_site_option( 'welcome_user_email', $text ); } return $text; } /* * Determines whether to force SSL on content. * * @since 2.8.5 * * @param bool $force * @return bool True if forced, false if not forced. / function force_ssl_content( $force = '' ) { static $forced_content = false; if ( ! $force ) { $old_forced = $forced_content; $forced_content = $force; return $old_forced; } return $forced_content; } /* * Formats a URL to use https. * * Useful as a filter. * * @since 2.8.5 * * @param string $url URL. * @return string URL with https as the scheme. / function filter_SSL( $url ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid if ( ! is_string( $url ) ) { return get_bloginfo( 'url' ); // Return home site URL with proper scheme. } if ( force_ssl_content() && is_ssl() ) { $url = set_url_scheme( $url, 'https' ); } return $url; } /* * Schedules update of the network-wide counts for the current network. * * @since 3.1.0 / function wp_schedule_update_network_counts() { if ( ! is_main_site() ) { return; } if ( ! wp_next_scheduled( 'update_network_counts' ) && ! wp_installing() ) { wp_schedule_event( time(), 'twicedaily', 'update_network_counts' ); } } /* * Updates the network-wide counts for the current network. * * @since 3.1.0 * @since 4.8.0 The `$network_id` parameter has been added. * * @param int\|null $network_id ID of the network. Default is the current network. / function wp_update_network_counts( $network_id = null ) { wp_update_network_user_counts( $network_id ); wp_update_network_site_counts( $network_id ); } /* * Updates the count of sites for the current network. * * If enabled through the {@see 'enable_live_network_counts'} filter, update the sites count * on a network when a site is created or its status is updated. * * @since 3.7.0 * @since 4.8.0 The `$network_id` parameter has been added. * * @param int\|null $network_id ID of the network. Default is the current network. / function wp_maybe_update_network_site_counts( $network_id = null ) { $is_small_network = ! wp_is_large_network( 'sites', $network_id ); /* * Filters whether to update network site or user counts when a new site is created. * * @since 3.7.0 * * @see wp_is_large_network() * * @param bool $small_network Whether the network is considered small. * @param string $context Context. Either 'users' or 'sites'. / if ( ! apply_filters( 'enable_live_network_counts', $is_small_network, 'sites' ) ) { return; } wp_update_network_site_counts( $network_id ); } /* * Updates the network-wide users count. * * If enabled through the {@see 'enable_live_network_counts'} filter, update the users count * on a network when a user is created or its status is updated. * * @since 3.7.0 * @since 4.8.0 The `$network_id` parameter has been added. * * @param int\|null $network_id ID of the network. Default is the current network. / function wp_maybe_update_network_user_counts( $network_id = null ) { $is_small_network = ! wp_is_large_network( 'users', $network_id ); /* This filter is documented in wp-includes/ms-functions.php / if ( ! apply_filters( 'enable_live_network_counts', $is_small_network, 'users' ) ) { return; } wp_update_network_user_counts( $network_id ); } /* * Updates the network-wide site count. * * @since 3.7.0 * @since 4.8.0 The `$network_id` parameter has been added. * * @param int\|null $network_id ID of the network. Default is the current network. / function wp_update_network_site_counts( $network_id = null ) { $network_id = (int) $network_id; if ( ! $network_id ) { $network_id = get_current_network_id(); } $count = get_sites( array( 'network_id' => $network_id, 'spam' => 0, 'deleted' => 0, 'archived' => 0, 'count' => true, 'update_site_meta_cache' => false, ) ); update_network_option( $network_id, 'blog_count', $count ); } /* * Updates the network-wide user count. * * @since 3.7.0 * @since 4.8.0 The `$network_id` parameter has been added. * @since 6.0.0 This function is now a wrapper for wp_update_user_counts(). * * @param int\|null $network_id ID of the network. Default is the current network. / function wp_update_network_user_counts( $network_id = null ) { wp_update_user_counts( $network_id ); } /* * Returns the space used by the current site. * * @since 3.5.0 * * @return int Used space in megabytes. / function get_space_used() { /* * Filters the amount of storage space used by the current site, in megabytes. * * @since 3.5.0 * * @param int\|false $space_used The amount of used space, in megabytes. Default false. / $space_used = apply_filters( 'pre_get_space_used', false ); if ( false === $space_used ) { $upload_dir = wp_upload_dir(); $space_used = get_dirsize( $upload_dir['basedir'] ) / MB_IN_BYTES; } return $space_used; } /* * Returns the upload quota for the current blog. * * @since MU (3.0.0) * * @return int Quota in megabytes. / function get_space_allowed() { $space_allowed = get_option( 'blog_upload_space' ); if ( ! is_numeric( $space_allowed ) ) { $space_allowed = get_site_option( 'blog_upload_space' ); } if ( ! is_numeric( $space_allowed ) ) { $space_allowed = 100; } /* * Filters the upload quota for the current site. * * @since 3.7.0 * * @param int $space_allowed Upload quota in megabytes for the current blog. / return apply_filters( 'get_space_allowed', $space_allowed ); } /* * Determines if there is any upload space left in the current blog's quota. * * @since 3.0.0 * * @return int of upload space available in bytes. / function get_upload_space_available() { $allowed = get_space_allowed(); if ( $allowed < 0 ) { $allowed = 0; } $space_allowed = $allowed MB_IN_BYTES; if ( get_site_option( 'upload_space_check_disabled' ) ) { return $space_allowed; } $space_used = get_space_used() * MB_IN_BYTES; if ( ( $space_allowed - $space_used ) <= 0 ) { return 0; } return $space_allowed - $space_used; } /** * Determines if there is any upload space left in the current blog's quota. * * @since 3.0.0 * @return bool True if space is available, false otherwise. / function is_upload_space_available() { if ( get_site_option( 'upload_space_check_disabled' ) ) { return true; } return (bool) get_upload_space_available(); } /* * Filters the maximum upload file size allowed, in bytes. * * @since 3.0.0 * * @param int $size Upload size limit in bytes. * @return int Upload size limit in bytes. / function upload_size_limit_filter( $size ) { $fileupload_maxk = (int) get_site_option( 'fileupload_maxk', 1500 ); $max_fileupload_in_bytes = KB_IN_BYTES $fileupload_maxk; if ( get_site_option( 'upload_space_check_disabled' ) ) { return min( $size, $max_fileupload_in_bytes ); } return min( $size, $max_fileupload_in_bytes, get_upload_space_available() ); } /** * Determines whether or not we have a large network. * * The default criteria for a large network is either more than 10,000 users or more than 10,000 sites. * Plugins can alter this criteria using the {@see 'wp_is_large_network'} filter. * * @since 3.3.0 * @since 4.8.0 The `$network_id` parameter has been added. * * @param string $using 'sites' or 'users'. Default is 'sites'. * @param int\|null $network_id ID of the network. Default is the current network. * @return bool True if the network meets the criteria for large. False otherwise. / function wp_is_large_network( $using = 'sites', $network_id = null ) { $network_id = (int) $network_id; if ( ! $network_id ) { $network_id = get_current_network_id(); } if ( 'users' === $using ) { $count = get_user_count( $network_id ); $is_large_network = wp_is_large_user_count( $network_id ); /* * Filters whether the network is considered large. * * @since 3.3.0 * @since 4.8.0 The `$network_id` parameter has been added. * * @param bool $is_large_network Whether the network has more than 10000 users or sites. * @param string $component The component to count. Accepts 'users', or 'sites'. * @param int $count The count of items for the component. * @param int $network_id The ID of the network being checked. / return apply_filters( 'wp_is_large_network', $is_large_network, 'users', $count, $network_id ); } $count = get_blog_count( $network_id ); /* This filter is documented in wp-includes/ms-functions.php / return apply_filters( 'wp_is_large_network', $count > 10000, 'sites', $count, $network_id ); } /* * Retrieves a list of reserved site on a sub-directory Multisite installation. * * @since 4.4.0 * * @return string[] Array of reserved names. / function get_subdirectory_reserved_names() { $names = array( 'page', 'comments', 'blog', 'files', 'feed', 'wp-admin', 'wp-content', 'wp-includes', 'wp-json', 'embed', ); /* * Filters reserved site names on a sub-directory Multisite installation. * * @since 3.0.0 * @since 4.4.0 'wp-admin', 'wp-content', 'wp-includes', 'wp-json', and 'embed' were added * to the reserved names list. * * @param string[] $subdirectory_reserved_names Array of reserved names. / return apply_filters( 'subdirectory_reserved_names', $names ); } /* * Sends a confirmation request email when a change of network admin email address is attempted. * * The new network admin address will not become active until confirmed. * * @since 4.9.0 * * @param string $old_value The old network admin email address. * @param string $value The proposed new network admin email address. / function update_network_option_new_admin_email( $old_value, $value ) { if ( get_site_option( 'admin_email' ) === $value \|\| ! is_email( $value ) ) { return; } $hash = md5( $value . time() . mt_rand() ); $new_admin_email = array( 'hash' => $hash, 'newemail' => $value, ); update_site_option( 'network_admin_hash', $new_admin_email ); $switched_locale = switch_to_user_locale( get_current_user_id() ); / translators: Do not translate USERNAME, ADMIN_URL, EMAIL, SITENAME, SITEURL: those are placeholders. / $email_text = __( 'Howdy ###USERNAME###, You recently requested to have the network admin email address on your network changed. If this is correct, please click on the following link to change it: ###ADMIN_URL### You can safely ignore and delete this email if you do not want to take this action. This email has been sent to ###EMAIL### Regards, All at ###SITENAME### ###SITEURL###' ); /* * Filters the text of the email sent when a change of network admin email address is attempted. * * The following strings have a special meaning and will get replaced dynamically: * ###USERNAME### The current user's username. * ###ADMIN_URL### The link to click on to confirm the email change. * ###EMAIL### The proposed new network admin email address. * ###SITENAME### The name of the network. * ###SITEURL### The URL to the network. * * @since 4.9.0 * * @param string $email_text Text in the email. * @param array $new_admin_email { * Data relating to the new network admin email address. * * @type string $hash The secure hash used in the confirmation link URL. * @type string $newemail The proposed new network admin email address. * } / $content = apply_filters( 'new_network_admin_email_content', $email_text, $new_admin_email ); $current_user = wp_get_current_user(); $content = str_replace( '###USERNAME###', $current_user->user_login, $content ); $content = str_replace( '###ADMIN_URL###', esc_url( network_admin_url( 'settings.php?network_admin_hash=' . $hash ) ), $content ); $content = str_replace( '###EMAIL###', $value, $content ); $content = str_replace( '###SITENAME###', wp_specialchars_decode( get_site_option( 'site_name' ), ENT_QUOTES ), $content ); $content = str_replace( '###SITEURL###', network_home_url(), $content ); wp_mail( $value, sprintf( / translators: Email change notification email subject. %s: Network title. / __( '[%s] Network Admin Email Change Request' ), wp_specialchars_decode( get_site_option( 'site_name' ), ENT_QUOTES ) ), $content ); if ( $switched_locale ) { restore_previous_locale(); } } /* * Sends an email to the old network admin email address when the network admin email address changes. * * @since 4.9.0 * * @param string $option_name The relevant database option name. * @param string $new_email The new network admin email address. * @param string $old_email The old network admin email address. * @param int $network_id ID of the network. / function wp_network_admin_email_change_notification( $option_name, $new_email, $old_email, $network_id ) { $send = true; // Don't send the notification to the default 'admin_email' value. if ( 'you@example.com' === $old_email ) { $send = false; } /* * Filters whether to send the network admin email change notification email. * * @since 4.9.0 * * @param bool $send Whether to send the email notification. * @param string $old_email The old network admin email address. * @param string $new_email The new network admin email address. * @param int $network_id ID of the network. / $send = apply_filters( 'send_network_admin_email_change_email', $send, $old_email, $new_email, $network_id ); if ( ! $send ) { return; } / translators: Do not translate OLD_EMAIL, NEW_EMAIL, SITENAME, SITEURL: those are placeholders. / $email_change_text = __( 'Hi, This notice confirms that the network admin email address was changed on ###SITENAME###. The new network admin email address is ###NEW_EMAIL###. This email has been sent to ###OLD_EMAIL### Regards, All at ###SITENAME### ###SITEURL###' ); $email_change_email = array( 'to' => $old_email, / translators: Network admin email change notification email subject. %s: Network title. / 'subject' => __( '[%s] Network Admin Email Changed' ), 'message' => $email_change_text, 'headers' => '', ); // Get network name. $network_name = wp_specialchars_decode( get_site_option( 'site_name' ), ENT_QUOTES ); /* * Filters the contents of the email notification sent when the network admin email address is changed. * * @since 4.9.0 * * @param array $email_change_email { * Used to build wp_mail(). * * @type string $to The intended recipient. * @type string $subject The subject of the email. * @type string $message The content of the email. * The following strings have a special meaning and will get replaced dynamically: * - ###OLD_EMAIL### The old network admin email address. * - ###NEW_EMAIL### The new network admin email address. * - ###SITENAME### The name of the network. * - ###SITEURL### The URL to the site. * @type string $headers Headers. * } * @param string $old_email The old network admin email address. * @param string $new_email The new network admin email address. * @param int $network_id ID of the network. */ $email_change_email = apply_filters( 'network_admin_email_change_email', $email_change_email, $old_email, $new_email, $network_id ); $email_change_email['message'] = str_replace( '###OLD_EMAIL###', $old_email, $email_change_email['message'] ); $email_change_email['message'] = str_replace( '###NEW_EMAIL###', $new_email, $email_change_email['message'] ); $email_change_email['message'] = str_replace( '###SITENAME###', $network_name, $email_change_email['message'] ); $email_change_email['message'] = str_replace( '###SITEURL###', home_url(), $email_change_email['message'] ); wp_mail( $email_change_email['to'], sprintf( $email_change_email['subject'], $network_name ), $email_change_email['message'], $email_change_email['headers'] ); } Back

Edit File : ms-functions.php | Size : 89.44 KB

<?php
/**
 * Multisite WordPress API
 *
 * @package WordPress
 * @subpackage Multisite
 * @since 3.0.0
 */

/**
 * Gets the network's site and user counts.
 *
 * @since MU (3.0.0)
 *
 * @return int[] {
 *     Site and user count for the network.
 *
 *     @type int $blogs Number of sites on the network.
 *     @type int $users Number of users on the network.
 * }
 */
function get_sitestats() {
	$stats = array(
		'blogs' => get_blog_count(),
		'users' => get_user_count(),
	);

return $stats;
}

/**
 * Gets one of a user's active blogs.
 *
 * Returns the user's primary blog, if they have one and
 * it is active. If it's inactive, function returns another
 * active blog of the user. If none are found, the user
 * is added as a Subscriber to the Dashboard Blog and that blog
 * is returned.
 *
 * @since MU (3.0.0)
 *
 * @param int $user_id The unique ID of the user
 * @return WP_Site|void The blog object
 */
function get_active_blog_for_user( $user_id ) {
	$blogs = get_blogs_of_user( $user_id );
	if ( empty( $blogs ) ) {
		return;
	}

if ( ! is_multisite() ) {
		return $blogs[ get_current_blog_id() ];
	}

$primary_blog = get_user_meta( $user_id, 'primary_blog', true );
	$first_blog   = current( $blogs );
	if ( false !== $primary_blog ) {
		if ( ! isset( $blogs[ $primary_blog ] ) ) {
			update_user_meta( $user_id, 'primary_blog', $first_blog->userblog_id );
			$primary = get_site( $first_blog->userblog_id );
		} else {
			$primary = get_site( $primary_blog );
		}
	} else {
		// TODO: Review this call to add_user_to_blog too - to get here the user must have a role on this blog?
		$result = add_user_to_blog( $first_blog->userblog_id, $user_id, 'subscriber' );

if ( ! is_wp_error( $result ) ) {
			update_user_meta( $user_id, 'primary_blog', $first_blog->userblog_id );
			$primary = $first_blog;
		}
	}

if ( ( ! is_object( $primary ) )
		|| ( '1' === $primary->archived || '1' === $primary->spam || '1' === $primary->deleted )
	) {
		$blogs = get_blogs_of_user( $user_id, true ); // If a user's primary blog is shut down, check their other blogs.
		$ret   = false;

if ( is_array( $blogs ) && count( $blogs ) > 0 ) {
			$current_network_id = get_current_network_id();

foreach ( (array) $blogs as $blog_id => $blog ) {
				if ( $blog->site_id !== $current_network_id ) {
					continue;
				}

$details = get_site( $blog_id );
				if ( is_object( $details )
					&& '0' === $details->archived && '0' === $details->spam && '0' === $details->deleted
				) {
					$ret = $details;
					if ( (int) get_user_meta( $user_id, 'primary_blog', true ) !== $blog_id ) {
						update_user_meta( $user_id, 'primary_blog', $blog_id );
					}
					if ( ! get_user_meta( $user_id, 'source_domain', true ) ) {
						update_user_meta( $user_id, 'source_domain', $details->domain );
					}
					break;
				}
			}
		} else {
			return;
		}

return $ret;
	} else {
		return $primary;
	}
}

/**
 * Gets the number of active sites on the installation.
 *
 * The count is cached and updated twice daily. This is not a live count.
 *
 * @since MU (3.0.0)
 * @since 3.7.0 The `$network_id` parameter has been deprecated.
 * @since 4.8.0 The `$network_id` parameter is now being used.
 *
 * @param int|null $network_id ID of the network. Default is the current network.
 * @return int Number of active sites on the network.
 */
function get_blog_count( $network_id = null ) {
	return get_network_option( $network_id, 'blog_count' );
}

/**
 * Gets a blog post from any site on the network.
 *
 * This function is similar to get_post(), except that it can retrieve a post
 * from any site on the network, not just the current site.
 *
 * @since MU (3.0.0)
 *
 * @param int $blog_id ID of the blog.
 * @param int $post_id ID of the post being looked for.
 * @return WP_Post|null WP_Post object on success, null on failure
 */
function get_blog_post( $blog_id, $post_id ) {
	switch_to_blog( $blog_id );
	$post = get_post( $post_id );
	restore_current_blog();

return $post;
}

/**
 * Adds a user to a blog, along with specifying the user's role.
 *
 * Use the {@see 'add_user_to_blog'} action to fire an event when users are added to a blog.
 *
 * @since MU (3.0.0)
 *
 * @param int    $blog_id ID of the blog the user is being added to.
 * @param int    $user_id ID of the user being added.
 * @param string $role    User role.
 * @return true|WP_Error True on success or a WP_Error object if the user doesn't exist
 *                       or could not be added.
 */
function add_user_to_blog( $blog_id, $user_id, $role ) {
	switch_to_blog( $blog_id );

$user = get_userdata( $user_id );

if ( ! $user ) {
		restore_current_blog();
		return new WP_Error( 'user_does_not_exist', __( 'The requested user does not exist.' ) );
	}

/**
	 * Filters whether a user should be added to a site.
	 *
	 * @since 4.9.0
	 *
	 * @param true|WP_Error $retval  True if the user should be added to the site, error
	 *                               object otherwise.
	 * @param int           $user_id User ID.
	 * @param string        $role    User role.
	 * @param int           $blog_id Site ID.
	 */
	$can_add_user = apply_filters( 'can_add_user_to_blog', true, $user_id, $role, $blog_id );

if ( true !== $can_add_user ) {
		restore_current_blog();

if ( is_wp_error( $can_add_user ) ) {
			return $can_add_user;
		}

return new WP_Error( 'user_cannot_be_added', __( 'User cannot be added to this site.' ) );
	}

if ( ! get_user_meta( $user_id, 'primary_blog', true ) ) {
		update_user_meta( $user_id, 'primary_blog', $blog_id );
		$site = get_site( $blog_id );
		update_user_meta( $user_id, 'source_domain', $site->domain );
	}

$user->set_role( $role );

/**
	 * Fires immediately after a user is added to a site.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param int    $user_id User ID.
	 * @param string $role    User role.
	 * @param int    $blog_id Blog ID.
	 */
	do_action( 'add_user_to_blog', $user_id, $role, $blog_id );

clean_user_cache( $user_id );
	wp_cache_delete( $blog_id . '_user_count', 'blog-details' );

restore_current_blog();

return true;
}

/**
 * Removes a user from a blog.
 *
 * Use the {@see 'remove_user_from_blog'} action to fire an event when
 * users are removed from a blog.
 *
 * Accepts an optional `$reassign` parameter, if you want to
 * reassign the user's blog posts to another user upon removal.
 *
 * @since MU (3.0.0)
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int $user_id  ID of the user being removed.
 * @param int $blog_id  Optional. ID of the blog the user is being removed from. Default 0.
 * @param int $reassign Optional. ID of the user to whom to reassign posts. Default 0.
 * @return true|WP_Error True on success or a WP_Error object if the user doesn't exist.
 */
function remove_user_from_blog( $user_id, $blog_id = 0, $reassign = 0 ) {
	global $wpdb;

$user_id = (int) $user_id;
	$blog_id = (int) $blog_id;

switch_to_blog( $blog_id );

/**
	 * Fires before a user is removed from a site.
	 *
	 * @since MU (3.0.0)
	 * @since 5.4.0 Added the `$reassign` parameter.
	 *
	 * @param int $user_id  ID of the user being removed.
	 * @param int $blog_id  ID of the blog the user is being removed from.
	 * @param int $reassign ID of the user to whom to reassign posts.
	 */
	do_action( 'remove_user_from_blog', $user_id, $blog_id, $reassign );

/*
	 * If being removed from the primary blog, set a new primary
	 * if the user is assigned to multiple blogs.
	 */
	$primary_blog = (int) get_user_meta( $user_id, 'primary_blog', true );
	if ( $primary_blog === $blog_id ) {
		$new_id     = '';
		$new_domain = '';
		$blogs      = get_blogs_of_user( $user_id );
		foreach ( (array) $blogs as $blog ) {
			if ( $blog->userblog_id === $blog_id ) {
				continue;
			}
			$new_id     = $blog->userblog_id;
			$new_domain = $blog->domain;
			break;
		}

update_user_meta( $user_id, 'primary_blog', $new_id );
		update_user_meta( $user_id, 'source_domain', $new_domain );
	}

$user = get_userdata( $user_id );
	if ( ! $user ) {
		restore_current_blog();
		return new WP_Error( 'user_does_not_exist', __( 'That user does not exist.' ) );
	}

$user->remove_all_caps();

$blogs = get_blogs_of_user( $user_id );
	if ( count( $blogs ) === 0 ) {
		update_user_meta( $user_id, 'primary_blog', '' );
		update_user_meta( $user_id, 'source_domain', '' );
	}

if ( $reassign ) {
		$reassign = (int) $reassign;
		$post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d", $user_id ) );
		$link_ids = $wpdb->get_col( $wpdb->prepare( "SELECT link_id FROM $wpdb->links WHERE link_owner = %d", $user_id ) );

if ( ! empty( $post_ids ) ) {
			$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET post_author = %d WHERE post_author = %d", $reassign, $user_id ) );
			array_walk( $post_ids, 'clean_post_cache' );
		}

if ( ! empty( $link_ids ) ) {
			$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->links SET link_owner = %d WHERE link_owner = %d", $reassign, $user_id ) );
			array_walk( $link_ids, 'clean_bookmark_cache' );
		}
	}

clean_user_cache( $user_id );
	restore_current_blog();

return true;
}

/**
 * Gets the permalink for a post on another blog.
 *
 * @since MU (3.0.0) 1.0
 *
 * @param int $blog_id ID of the source blog.
 * @param int $post_id ID of the desired post.
 * @return string The post's permalink.
 */
function get_blog_permalink( $blog_id, $post_id ) {
	switch_to_blog( $blog_id );
	$link = get_permalink( $post_id );
	restore_current_blog();

return $link;
}

/**
 * Gets a blog's numeric ID from its URL.
 *
 * On a subdirectory installation like example.com/blog1/,
 * $domain will be the root 'example.com' and $path the
 * subdirectory '/blog1/'. With subdomains like blog1.example.com,
 * $domain is 'blog1.example.com' and $path is '/'.
 *
 * @since MU (3.0.0)
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param string $domain Website domain.
 * @param string $path   Optional. Not required for subdomain installations. Default '/'.
 * @return int 0 if no blog found, otherwise the ID of the matching blog.
 */
function get_blog_id_from_url( $domain, $path = '/' ) {
	$domain = strtolower( $domain );
	$path   = strtolower( $path );
	$id     = wp_cache_get( md5( $domain . $path ), 'blog-id-cache' );

if ( -1 === $id ) { // Blog does not exist.
		return 0;
	} elseif ( $id ) {
		return (int) $id;
	}

$args   = array(
		'domain'                 => $domain,
		'path'                   => $path,
		'fields'                 => 'ids',
		'number'                 => 1,
		'update_site_meta_cache' => false,
	);
	$result = get_sites( $args );
	$id     = array_shift( $result );

if ( ! $id ) {
		wp_cache_set( md5( $domain . $path ), -1, 'blog-id-cache' );
		return 0;
	}

wp_cache_set( md5( $domain . $path ), $id, 'blog-id-cache' );

return $id;
}

//
// Admin functions.
//

/**
 * Checks an email address against a list of banned domains.
 *
 * This function checks against the Banned Email Domains list
 * at wp-admin/network/settings.php. The check is only run on
 * self-registrations; user creation at wp-admin/network/users.php
 * bypasses this check.
 *
 * @since MU (3.0.0)
 *
 * @param string $user_email The email provided by the user at registration.
 * @return bool True when the email address is banned, false otherwise.
 */
function is_email_address_unsafe( $user_email ) {
	$banned_names = get_site_option( 'banned_email_domains' );
	if ( $banned_names && ! is_array( $banned_names ) ) {
		$banned_names = explode( "\n", $banned_names );
	}

$is_email_address_unsafe = false;

if ( $banned_names && is_array( $banned_names ) && false !== strpos( $user_email, '@', 1 ) ) {
		$banned_names     = array_map( 'strtolower', $banned_names );
		$normalized_email = strtolower( $user_email );

list( $email_local_part, $email_domain ) = explode( '@', $normalized_email );

foreach ( $banned_names as $banned_domain ) {
			if ( ! $banned_domain ) {
				continue;
			}

if ( $email_domain === $banned_domain ) {
				$is_email_address_unsafe = true;
				break;
			}

if ( str_ends_with( $normalized_email, ".$banned_domain" ) ) {
				$is_email_address_unsafe = true;
				break;
			}
		}
	}

/**
	 * Filters whether an email address is unsafe.
	 *
	 * @since 3.5.0
	 *
	 * @param bool   $is_email_address_unsafe Whether the email address is "unsafe". Default false.
	 * @param string $user_email              User email address.
	 */
	return apply_filters( 'is_email_address_unsafe', $is_email_address_unsafe, $user_email );
}

/**
 * Sanitizes and validates data required for a user sign-up.
 *
 * Verifies the validity and uniqueness of user names and user email addresses,
 * and checks email addresses against allowed and disallowed domains provided by
 * administrators.
 *
 * The {@see 'wpmu_validate_user_signup'} hook provides an easy way to modify the sign-up
 * process. The value $result, which is passed to the hook, contains both the user-provided
 * info and the error messages created by the function. {@see 'wpmu_validate_user_signup'}
 * allows you to process the data in any way you'd like, and unset the relevant errors if
 * necessary.
 *
 * @since MU (3.0.0)
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param string $user_name  The login name provided by the user.
 * @param string $user_email The email provided by the user.
 * @return array {
 *     The array of user name, email, and the error messages.
 *
 *     @type string   $user_name     Sanitized and unique username.
 *     @type string   $orig_username Original username.
 *     @type string   $user_email    User email address.
 *     @type WP_Error $errors        WP_Error object containing any errors found.
 * }
 */
function wpmu_validate_user_signup( $user_name, $user_email ) {
	global $wpdb;

$errors = new WP_Error();

$orig_username = $user_name;
	$user_name     = preg_replace( '/\s+/', '', sanitize_user( $user_name, true ) );

if ( $user_name !== $orig_username || preg_match( '/[^a-z0-9]/', $user_name ) ) {
		$errors->add( 'user_name', __( 'Usernames can only contain lowercase letters (a-z) and numbers.' ) );
		$user_name = $orig_username;
	}

$user_email = sanitize_email( $user_email );

if ( empty( $user_name ) ) {
		$errors->add( 'user_name', __( 'Please enter a username.' ) );
	}

$illegal_names = get_site_option( 'illegal_names' );

if ( ! is_array( $illegal_names ) ) {
		$illegal_names = array( 'www', 'web', 'root', 'admin', 'main', 'invite', 'administrator' );
		add_site_option( 'illegal_names', $illegal_names );
	}

if ( in_array( $user_name, $illegal_names, true ) ) {
		$errors->add( 'user_name', __( 'Sorry, that username is not allowed.' ) );
	}

/** This filter is documented in wp-includes/user.php */
	$illegal_logins = (array) apply_filters( 'illegal_user_logins', array() );

if ( in_array( strtolower( $user_name ), array_map( 'strtolower', $illegal_logins ), true ) ) {
		$errors->add( 'user_name', __( 'Sorry, that username is not allowed.' ) );
	}

if ( ! is_email( $user_email ) ) {
		$errors->add( 'user_email', __( 'Please enter a valid email address.' ) );
	} elseif ( is_email_address_unsafe( $user_email ) ) {
		$errors->add( 'user_email', __( 'You cannot use that email address to signup. There are problems with them blocking some emails from WordPress. Please use another email provider.' ) );
	}

if ( strlen( $user_name ) < 4 ) {
		$errors->add( 'user_name', __( 'Username must be at least 4 characters.' ) );
	}

if ( strlen( $user_name ) > 60 ) {
		$errors->add( 'user_name', __( 'Username may not be longer than 60 characters.' ) );
	}

// All numeric?
	if ( preg_match( '/^[0-9]*$/', $user_name ) ) {
		$errors->add( 'user_name', __( 'Sorry, usernames must have letters too!' ) );
	}

$limited_email_domains = get_site_option( 'limited_email_domains' );

if ( is_array( $limited_email_domains ) && ! empty( $limited_email_domains ) ) {
		$limited_email_domains = array_map( 'strtolower', $limited_email_domains );
		$email_domain          = strtolower( substr( $user_email, 1 + strpos( $user_email, '@' ) ) );

if ( ! in_array( $email_domain, $limited_email_domains, true ) ) {
			$errors->add( 'user_email', __( 'Sorry, that email address is not allowed!' ) );
		}
	}

// Check if the username has been used already.
	if ( username_exists( $user_name ) ) {
		$errors->add( 'user_name', __( 'Sorry, that username already exists!' ) );
	}

// Check if the email address has been used already.
	if ( email_exists( $user_email ) ) {
		$errors->add(
			'user_email',
			sprintf(
				/* translators: %s: Link to the login page. */
				__( '<strong>Error:</strong> This email address is already registered. <a href="%s">Log in</a> with this address or choose another one.' ),
				wp_login_url()
			)
		);
	}

// Has someone already signed up for this username?
	$signup = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->signups WHERE user_login = %s", $user_name ) );
	if ( $signup instanceof stdClass ) {
		$registered_at = mysql2date( 'U', $signup->registered );
		$now           = time();
		$diff          = $now - $registered_at;
		// If registered more than two days ago, cancel registration and let this signup go through.
		if ( $diff > 2 * DAY_IN_SECONDS ) {
			$wpdb->delete( $wpdb->signups, array( 'user_login' => $user_name ) );
		} else {
			$errors->add( 'user_name', __( 'That username is currently reserved but may be available in a couple of days.' ) );
		}
	}

$signup = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->signups WHERE user_email = %s", $user_email ) );
	if ( $signup instanceof stdClass ) {
		$diff = time() - mysql2date( 'U', $signup->registered );
		// If registered more than two days ago, cancel registration and let this signup go through.
		if ( $diff > 2 * DAY_IN_SECONDS ) {
			$wpdb->delete( $wpdb->signups, array( 'user_email' => $user_email ) );
		} else {
			$errors->add( 'user_email', __( 'That email address has already been used. Please check your inbox for an activation email. It will become available in a couple of days if you do nothing.' ) );
		}
	}

$result = array(
		'user_name'     => $user_name,
		'orig_username' => $orig_username,
		'user_email'    => $user_email,
		'errors'        => $errors,
	);

/**
	 * Filters the validated user registration details.
	 *
	 * This does not allow you to override the username or email of the user during
	 * registration. The values are solely used for validation and error handling.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param array $result {
	 *     The array of user name, email, and the error messages.
	 *
	 *     @type string   $user_name     Sanitized and unique username.
	 *     @type string   $orig_username Original username.
	 *     @type string   $user_email    User email address.
	 *     @type WP_Error $errors        WP_Error object containing any errors found.
	 * }
	 */
	return apply_filters( 'wpmu_validate_user_signup', $result );
}

/**
 * Processes new site registrations.
 *
 * Checks the data provided by the user during blog signup. Verifies
 * the validity and uniqueness of blog paths and domains.
 *
 * This function prevents the current user from registering a new site
 * with a blogname equivalent to another user's login name. Passing the
 * $user parameter to the function, where $user is the other user, is
 * effectively an override of this limitation.
 *
 * Filter {@see 'wpmu_validate_blog_signup'} if you want to modify
 * the way that WordPress validates new site signups.
 *
 * @since MU (3.0.0)
 *
 * @global wpdb   $wpdb   WordPress database abstraction object.
 * @global string $domain
 *
 * @param string         $blogname   The site name provided by the user. Must be unique.
 * @param string         $blog_title The site title provided by the user.
 * @param WP_User|string $user       Optional. The user object to check against the new site name.
 *                                   Default empty string.
 * @return array {
 *     Array of domain, path, site name, site title, user and error messages.
 *
 *     @type string         $domain     Domain for the site.
 *     @type string         $path       Path for the site. Used in subdirectory installations.
 *     @type string         $blogname   The unique site name (slug).
 *     @type string         $blog_title Blog title.
 *     @type string|WP_User $user       By default, an empty string. A user object if provided.
 *     @type WP_Error       $errors     WP_Error containing any errors found.
 * }
 */
function wpmu_validate_blog_signup( $blogname, $blog_title, $user = '' ) {
	global $wpdb, $domain;

$current_network = get_network();
	$base            = $current_network->path;

$blog_title = strip_tags( $blog_title );

$errors        = new WP_Error();
	$illegal_names = get_site_option( 'illegal_names' );

if ( ! is_array( $illegal_names ) ) {
		$illegal_names = array( 'www', 'web', 'root', 'admin', 'main', 'invite', 'administrator' );
		add_site_option( 'illegal_names', $illegal_names );
	}

/*
	 * On sub dir installations, some names are so illegal, only a filter can
	 * spring them from jail.
	 */
	if ( ! is_subdomain_install() ) {
		$illegal_names = array_merge( $illegal_names, get_subdirectory_reserved_names() );
	}

if ( empty( $blogname ) ) {
		$errors->add( 'blogname', __( 'Please enter a site name.' ) );
	}

if ( preg_match( '/[^a-z0-9]+/', $blogname ) ) {
		$errors->add( 'blogname', __( 'Site names can only contain lowercase letters (a-z) and numbers.' ) );
	}

if ( in_array( $blogname, $illegal_names, true ) ) {
		$errors->add( 'blogname', __( 'That name is not allowed.' ) );
	}

/**
	 * Filters the minimum site name length required when validating a site signup.
	 *
	 * @since 4.8.0
	 *
	 * @param int $length The minimum site name length. Default 4.
	 */
	$minimum_site_name_length = apply_filters( 'minimum_site_name_length', 4 );

if ( strlen( $blogname ) < $minimum_site_name_length ) {
		/* translators: %s: Minimum site name length. */
		$errors->add( 'blogname', sprintf( _n( 'Site name must be at least %s character.', 'Site name must be at least %s characters.', $minimum_site_name_length ), number_format_i18n( $minimum_site_name_length ) ) );
	}

// Do not allow users to create a site that conflicts with a page on the main blog.
	if ( ! is_subdomain_install() && $wpdb->get_var( $wpdb->prepare( 'SELECT post_name FROM ' . $wpdb->get_blog_prefix( $current_network->site_id ) . "posts WHERE post_type = 'page' AND post_name = %s", $blogname ) ) ) {
		$errors->add( 'blogname', __( 'Sorry, you may not use that site name.' ) );
	}

// All numeric?
	if ( preg_match( '/^[0-9]*$/', $blogname ) ) {
		$errors->add( 'blogname', __( 'Sorry, site names must have letters too!' ) );
	}

/**
	 * Filters the new site name during registration.
	 *
	 * The name is the site's subdomain or the site's subdirectory
	 * path depending on the network settings.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param string $blogname Site name.
	 */
	$blogname = apply_filters( 'newblogname', $blogname );

$blog_title = wp_unslash( $blog_title );

if ( empty( $blog_title ) ) {
		$errors->add( 'blog_title', __( 'Please enter a site title.' ) );
	}

// Check if the domain/path has been used already.
	if ( is_subdomain_install() ) {
		$mydomain = $blogname . '.' . preg_replace( '|^www\.|', '', $domain );
		$path     = $base;
	} else {
		$mydomain = $domain;
		$path     = $base . $blogname . '/';
	}
	if ( domain_exists( $mydomain, $path, $current_network->id ) ) {
		$errors->add( 'blogname', __( 'Sorry, that site already exists!' ) );
	}

/*
	 * Do not allow users to create a site that matches an existing user's login name,
	 * unless it's the user's own username.
	 */
	if ( username_exists( $blogname ) ) {
		if ( ! is_object( $user ) || ( is_object( $user ) && $user->user_login !== $blogname ) ) {
			$errors->add( 'blogname', __( 'Sorry, that site is reserved!' ) );
		}
	}

/*
	 * Has someone already signed up for this domain?
	 * TODO: Check email too?
	 */
	$signup = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->signups WHERE domain = %s AND path = %s", $mydomain, $path ) );
	if ( $signup instanceof stdClass ) {
		$diff = time() - mysql2date( 'U', $signup->registered );
		// If registered more than two days ago, cancel registration and let this signup go through.
		if ( $diff > 2 * DAY_IN_SECONDS ) {
			$wpdb->delete(
				$wpdb->signups,
				array(
					'domain' => $mydomain,
					'path'   => $path,
				)
			);
		} else {
			$errors->add( 'blogname', __( 'That site is currently reserved but may be available in a couple days.' ) );
		}
	}

$result = array(
		'domain'     => $mydomain,
		'path'       => $path,
		'blogname'   => $blogname,
		'blog_title' => $blog_title,
		'user'       => $user,
		'errors'     => $errors,
	);

/**
	 * Filters site details and error messages following registration.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param array $result {
	 *     Array of domain, path, site name, site title, user and error messages.
	 *
	 *     @type string         $domain     Domain for the site.
	 *     @type string         $path       Path for the site. Used in subdirectory installations.
	 *     @type string         $blogname   The unique site name (slug).
	 *     @type string         $blog_title Site title.
	 *     @type string|WP_User $user       By default, an empty string. A user object if provided.
	 *     @type WP_Error       $errors     WP_Error containing any errors found.
	 * }
	 */
	return apply_filters( 'wpmu_validate_blog_signup', $result );
}

/**
 * Records site signup information for future activation.
 *
 * @since MU (3.0.0)
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param string $domain     The requested domain.
 * @param string $path       The requested path.
 * @param string $title      The requested site title.
 * @param string $user       The user's requested login name.
 * @param string $user_email The user's email address.
 * @param array  $meta       Optional. Signup meta data. By default, contains the requested privacy setting and lang_id.
 */
function wpmu_signup_blog( $domain, $path, $title, $user, $user_email, $meta = array() ) {
	global $wpdb;

$key = substr( md5( time() . wp_rand() . $domain ), 0, 16 );

/**
	 * Filters the metadata for a site signup.
	 *
	 * The metadata will be serialized prior to storing it in the database.
	 *
	 * @since 4.8.0
	 *
	 * @param array  $meta       Signup meta data. Default empty array.
	 * @param string $domain     The requested domain.
	 * @param string $path       The requested path.
	 * @param string $title      The requested site title.
	 * @param string $user       The user's requested login name.
	 * @param string $user_email The user's email address.
	 * @param string $key        The user's activation key.
	 */
	$meta = apply_filters( 'signup_site_meta', $meta, $domain, $path, $title, $user, $user_email, $key );

$wpdb->insert(
		$wpdb->signups,
		array(
			'domain'         => $domain,
			'path'           => $path,
			'title'          => $title,
			'user_login'     => $user,
			'user_email'     => $user_email,
			'registered'     => current_time( 'mysql', true ),
			'activation_key' => $key,
			'meta'           => serialize( $meta ),
		)
	);

/**
	 * Fires after site signup information has been written to the database.
	 *
	 * @since 4.4.0
	 *
	 * @param string $domain     The requested domain.
	 * @param string $path       The requested path.
	 * @param string $title      The requested site title.
	 * @param string $user       The user's requested login name.
	 * @param string $user_email The user's email address.
	 * @param string $key        The user's activation key.
	 * @param array  $meta       Signup meta data. By default, contains the requested privacy setting and lang_id.
	 */
	do_action( 'after_signup_site', $domain, $path, $title, $user, $user_email, $key, $meta );
}

/**
 * Records user signup information for future activation.
 *
 * This function is used when user registration is open but
 * new site registration is not.
 *
 * @since MU (3.0.0)
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param string $user       The user's requested login name.
 * @param string $user_email The user's email address.
 * @param array  $meta       Optional. Signup meta data. Default empty array.
 */
function wpmu_signup_user( $user, $user_email, $meta = array() ) {
	global $wpdb;

// Format data.
	$user       = preg_replace( '/\s+/', '', sanitize_user( $user, true ) );
	$user_email = sanitize_email( $user_email );
	$key        = substr( md5( time() . wp_rand() . $user_email ), 0, 16 );

/**
	 * Filters the metadata for a user signup.
	 *
	 * The metadata will be serialized prior to storing it in the database.
	 *
	 * @since 4.8.0
	 *
	 * @param array  $meta       Signup meta data. Default empty array.
	 * @param string $user       The user's requested login name.
	 * @param string $user_email The user's email address.
	 * @param string $key        The user's activation key.
	 */
	$meta = apply_filters( 'signup_user_meta', $meta, $user, $user_email, $key );

$wpdb->insert(
		$wpdb->signups,
		array(
			'domain'         => '',
			'path'           => '',
			'title'          => '',
			'user_login'     => $user,
			'user_email'     => $user_email,
			'registered'     => current_time( 'mysql', true ),
			'activation_key' => $key,
			'meta'           => serialize( $meta ),
		)
	);

/**
	 * Fires after a user's signup information has been written to the database.
	 *
	 * @since 4.4.0
	 *
	 * @param string $user       The user's requested login name.
	 * @param string $user_email The user's email address.
	 * @param string $key        The user's activation key.
	 * @param array  $meta       Signup meta data. Default empty array.
	 */
	do_action( 'after_signup_user', $user, $user_email, $key, $meta );
}

/**
 * Sends a confirmation request email to a user when they sign up for a new site. The new site will not become active
 * until the confirmation link is clicked.
 *
 * This is the notification function used when site registration
 * is enabled.
 *
 * Filter {@see 'wpmu_signup_blog_notification'} to bypass this function or
 * replace it with your own notification behavior.
 *
 * Filter {@see 'wpmu_signup_blog_notification_email'} and
 * {@see 'wpmu_signup_blog_notification_subject'} to change the content
 * and subject line of the email sent to newly registered users.
 *
 * @since MU (3.0.0)
 *
 * @param string $domain     The new blog domain.
 * @param string $path       The new blog path.
 * @param string $title      The site title.
 * @param string $user_login The user's login name.
 * @param string $user_email The user's email address.
 * @param string $key        The activation key created in wpmu_signup_blog().
 * @param array  $meta       Optional. Signup meta data. By default, contains the requested privacy setting and lang_id.
 * @return bool
 */
function wpmu_signup_blog_notification(
	$domain,
	$path,
	$title,
	$user_login,
	$user_email,
	#[\SensitiveParameter]
	$key,
	$meta = array()
) {
	/**
	 * Filters whether to bypass the new site email notification.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param string|false $domain     Site domain, or false to prevent the email from sending.
	 * @param string       $path       Site path.
	 * @param string       $title      Site title.
	 * @param string       $user_login User login name.
	 * @param string       $user_email User email address.
	 * @param string       $key        Activation key created in wpmu_signup_blog().
	 * @param array        $meta       Signup meta data. By default, contains the requested privacy setting and lang_id.
	 */
	if ( ! apply_filters( 'wpmu_signup_blog_notification', $domain, $path, $title, $user_login, $user_email, $key, $meta ) ) {
		return false;
	}

// Send email with activation link.
	if ( ! is_subdomain_install() || get_current_network_id() !== 1 ) {
		$activate_url = network_site_url( "wp-activate.php?key=$key" );
	} else {
		$activate_url = "http://{$domain}{$path}wp-activate.php?key=$key"; // @todo Use *_url() API.
	}

$activate_url = esc_url( $activate_url );

$admin_email = get_site_option( 'admin_email' );

if ( '' === $admin_email ) {
		$admin_email = 'support@' . wp_parse_url( network_home_url(), PHP_URL_HOST );
	}

$user            = get_user_by( 'login', $user_login );
	$switched_locale = $user && switch_to_user_locale( $user->ID );

$message = sprintf(
		/**
		 * Filters the message content of the new blog notification email.
		 *
		 * Content should be formatted for transmission via wp_mail().
		 *
		 * @since MU (3.0.0)
		 *
		 * @param string $content    Content of the notification email.
		 * @param string $domain     Site domain.
		 * @param string $path       Site path.
		 * @param string $title      Site title.
		 * @param string $user_login User login name.
		 * @param string $user_email User email address.
		 * @param string $key        Activation key created in wpmu_signup_blog().
		 * @param array  $meta       Signup meta data. By default, contains the requested privacy setting and lang_id.
		 */
		apply_filters(
			'wpmu_signup_blog_notification_email',
			/* translators: New site notification email. 1: Activation URL, 2: New site URL. */
			__( "To activate your site, please click the following link:\n\n%1\$s\n\nAfter you activate, you will receive *another email* with your login.\n\nAfter you activate, you can visit your site here:\n\n%2\$s" ),
			$domain,
			$path,
			$title,
			$user_login,
			$user_email,
			$key,
			$meta
		),
		$activate_url,
		esc_url( "http://{$domain}{$path}" ),
		$key
	);

$subject = sprintf(
		/**
		 * Filters the subject of the new blog notification email.
		 *
		 * @since MU (3.0.0)
		 *
		 * @param string $subject    Subject of the notification email.
		 * @param string $domain     Site domain.
		 * @param string $path       Site path.
		 * @param string $title      Site title.
		 * @param string $user_login User login name.
		 * @param string $user_email User email address.
		 * @param string $key        Activation key created in wpmu_signup_blog().
		 * @param array  $meta       Signup meta data. By default, contains the requested privacy setting and lang_id.
		 */
		apply_filters(
			'wpmu_signup_blog_notification_subject',
			/* translators: New site notification email subject. 1: Network title, 2: New site URL. */
			_x( '[%1$s] Activate %2$s', 'New site notification email subject' ),
			$domain,
			$path,
			$title,
			$user_login,
			$user_email,
			$key,
			$meta
		),
		$from_name,
		esc_url( 'http://' . $domain . $path )
	);

wp_mail( $user_email, wp_specialchars_decode( $subject ), $message, $message_headers );

if ( $switched_locale ) {
		restore_previous_locale();
	}

return true;
}

/**
 * Sends a confirmation request email to a user when they sign up for a new user account (without signing up for a site
 * at the same time). The user account will not become active until the confirmation link is clicked.
 *
 * This is the notification function used when no new site has
 * been requested.
 *
 * Filter {@see 'wpmu_signup_user_notification'} to bypass this function or
 * replace it with your own notification behavior.
 *
 * Filter {@see 'wpmu_signup_user_notification_email'} and
 * {@see 'wpmu_signup_user_notification_subject'} to change the content
 * and subject line of the email sent to newly registered users.
 *
 * @since MU (3.0.0)
 *
 * @param string $user_login The user's login name.
 * @param string $user_email The user's email address.
 * @param string $key        The activation key created in wpmu_signup_user()
 * @param array  $meta       Optional. Signup meta data. Default empty array.
 * @return bool
 */
function wpmu_signup_user_notification(
	$user_login,
	$user_email,
	#[\SensitiveParameter]
	$key,
	$meta = array()
) {
	/**
	 * Filters whether to bypass the email notification for new user sign-up.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param string $user_login User login name.
	 * @param string $user_email User email address.
	 * @param string $key        Activation key created in wpmu_signup_user().
	 * @param array  $meta       Signup meta data. Default empty array.
	 */
	if ( ! apply_filters( 'wpmu_signup_user_notification', $user_login, $user_email, $key, $meta ) ) {
		return false;
	}

$user            = get_user_by( 'login', $user_login );
	$switched_locale = $user && switch_to_user_locale( $user->ID );

// Send email with activation link.
	$admin_email = get_site_option( 'admin_email' );

if ( '' === $admin_email ) {
		$admin_email = 'support@' . wp_parse_url( network_home_url(), PHP_URL_HOST );
	}

$from_name       = ( '' !== get_site_option( 'site_name' ) ) ? esc_html( get_site_option( 'site_name' ) ) : 'WordPress';
	$message_headers = "From: \"{$from_name}\" <{$admin_email}>\n" . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n";
	$message         = sprintf(
		/**
		 * Filters the content of the notification email for new user sign-up.
		 *
		 * Content should be formatted for transmission via wp_mail().
		 *
		 * @since MU (3.0.0)
		 *
		 * @param string $content    Content of the notification email.
		 * @param string $user_login User login name.
		 * @param string $user_email User email address.
		 * @param string $key        Activation key created in wpmu_signup_user().
		 * @param array  $meta       Signup meta data. Default empty array.
		 */
		apply_filters(
			'wpmu_signup_user_notification_email',
			/* translators: New user notification email. %s: Activation URL. */
			__( "To activate your user, please click the following link:\n\n%s\n\nAfter you activate, you will receive *another email* with your login." ),
			$user_login,
			$user_email,
			$key,
			$meta
		),
		site_url( "wp-activate.php?key=$key" )
	);

$subject = sprintf(
		/**
		 * Filters the subject of the notification email of new user signup.
		 *
		 * @since MU (3.0.0)
		 *
		 * @param string $subject    Subject of the notification email.
		 * @param string $user_login User login name.
		 * @param string $user_email User email address.
		 * @param string $key        Activation key created in wpmu_signup_user().
		 * @param array  $meta       Signup meta data. Default empty array.
		 */
		apply_filters(
			'wpmu_signup_user_notification_subject',
			/* translators: New user notification email subject. 1: Network title, 2: New user login. */
			_x( '[%1$s] Activate %2$s', 'New user notification email subject' ),
			$user_login,
			$user_email,
			$key,
			$meta
		),
		$from_name,
		$user_login
	);

wp_mail( $user_email, wp_specialchars_decode( $subject ), $message, $message_headers );

if ( $switched_locale ) {
		restore_previous_locale();
	}

return true;
}

/**
 * Activates a signup.
 *
 * Hook to {@see 'wpmu_activate_user'} or {@see 'wpmu_activate_blog'} for events
 * that should happen only when users or sites are self-created (since
 * those actions are not called when users and sites are created
 * by a Super Admin).
 *
 * @since MU (3.0.0)
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param string $key The activation key provided to the user.
 * @return array|WP_Error An array containing information about the activated user and/or blog.
 */
function wpmu_activate_signup(
	#[\SensitiveParameter]
	$key
) {
	global $wpdb;

$signup = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->signups WHERE activation_key = %s", $key ) );

if ( empty( $signup ) ) {
		return new WP_Error( 'invalid_key', __( 'Invalid activation key.' ) );
	}

if ( $signup->active ) {
		if ( empty( $signup->domain ) ) {
			return new WP_Error( 'already_active', __( 'The user is already active.' ), $signup );
		} else {
			return new WP_Error( 'already_active', __( 'The site is already active.' ), $signup );
		}
	}

$meta     = maybe_unserialize( $signup->meta );
	$password = wp_generate_password( 12, false );

$user_id = username_exists( $signup->user_login );

if ( ! $user_id ) {
		$user_id = wpmu_create_user( $signup->user_login, $password, $signup->user_email );
	} else {
		$user_already_exists = true;
	}

if ( ! $user_id ) {
		return new WP_Error( 'create_user', __( 'Could not create user' ), $signup );
	}

$now = current_time( 'mysql', true );

if ( empty( $signup->domain ) ) {
		$wpdb->update(
			$wpdb->signups,
			array(
				'active'    => 1,
				'activated' => $now,
			),
			array( 'activation_key' => $key )
		);

if ( isset( $user_already_exists ) ) {
			return new WP_Error( 'user_already_exists', __( 'That username is already activated.' ), $signup );
		}

/**
		 * Fires immediately after a new user is activated.
		 *
		 * @since MU (3.0.0)
		 *
		 * @param int    $user_id  User ID.
		 * @param string $password User password.
		 * @param array  $meta     Signup meta data.
		 */
		do_action( 'wpmu_activate_user', $user_id, $password, $meta );

return array(
			'user_id'  => $user_id,
			'password' => $password,
			'meta'     => $meta,
		);
	}

$blog_id = wpmu_create_blog( $signup->domain, $signup->path, $signup->title, $user_id, $meta, get_current_network_id() );

// TODO: What to do if we create a user but cannot create a blog?
	if ( is_wp_error( $blog_id ) ) {
		/*
		 * If blog is taken, that means a previous attempt to activate this blog
		 * failed in between creating the blog and setting the activation flag.
		 * Let's just set the active flag and instruct the user to reset their password.
		 */
		if ( 'blog_taken' === $blog_id->get_error_code() ) {
			$blog_id->add_data( $signup );
			$wpdb->update(
				$wpdb->signups,
				array(
					'active'    => 1,
					'activated' => $now,
				),
				array( 'activation_key' => $key )
			);
		}
		return $blog_id;
	}

$wpdb->update(
		$wpdb->signups,
		array(
			'active'    => 1,
			'activated' => $now,
		),
		array( 'activation_key' => $key )
	);

/**
	 * Fires immediately after a site is activated.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param int    $blog_id       Blog ID.
	 * @param int    $user_id       User ID.
	 * @param string $password      User password.
	 * @param string $signup_title  Site title.
	 * @param array  $meta          Signup meta data. By default, contains the requested privacy setting and lang_id.
	 */
	do_action( 'wpmu_activate_blog', $blog_id, $user_id, $password, $signup->title, $meta );

return array(
		'blog_id'  => $blog_id,
		'user_id'  => $user_id,
		'password' => $password,
		'title'    => $signup->title,
		'meta'     => $meta,
	);
}

/**
 * Deletes an associated signup entry when a user is deleted from the database.
 *
 * @since 5.5.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int      $id       ID of the user to delete.
 * @param int|null $reassign ID of the user to reassign posts and links to.
 * @param WP_User  $user     User object.
 */
function wp_delete_signup_on_user_delete( $id, $reassign, $user ) {
	global $wpdb;

$wpdb->delete( $wpdb->signups, array( 'user_login' => $user->user_login ) );
}

/**
 * Creates a user.
 *
 * This function runs when a user self-registers as well as when
 * a Super Admin creates a new user. Hook to {@see 'wpmu_new_user'} for events
 * that should affect all new users, but only on Multisite (otherwise
 * use {@see 'user_register'}).
 *
 * @since MU (3.0.0)
 *
 * @param string $user_name The new user's login name.
 * @param string $password  The new user's password.
 * @param string $email     The new user's email address.
 * @return int|false Returns false on failure, or int $user_id on success.
 */
function wpmu_create_user(
	$user_name,
	#[\SensitiveParameter]
	$password,
	$email
) {
	$user_name = preg_replace( '/\s+/', '', sanitize_user( $user_name, true ) );

$user_id = wp_create_user( $user_name, $password, $email );
	if ( is_wp_error( $user_id ) ) {
		return false;
	}

// Newly created users have no roles or caps until they are added to a blog.
	delete_user_option( $user_id, 'capabilities' );
	delete_user_option( $user_id, 'user_level' );

/**
	 * Fires immediately after a new user is created.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param int $user_id User ID.
	 */
	do_action( 'wpmu_new_user', $user_id );

return $user_id;
}

/**
 * Creates a site.
 *
 * This function runs when a user self-registers a new site as well
 * as when a Super Admin creates a new site. Hook to {@see 'wpmu_new_blog'}
 * for events that should affect all new sites.
 *
 * On subdirectory installations, $domain is the same as the main site's
 * domain, and the path is the subdirectory name (eg 'example.com'
 * and '/blog1/'). On subdomain installations, $domain is the new subdomain +
 * root domain (eg 'blog1.example.com'), and $path is '/'.
 *
 * @since MU (3.0.0)
 *
 * @param string $domain     The new site's domain.
 * @param string $path       The new site's path.
 * @param string $title      The new site's title.
 * @param int    $user_id    The user ID of the new site's admin.
 * @param array  $options    Optional. Array of key=>value pairs used to set initial site options.
 *                           If valid status keys are included ('public', 'archived', 'mature',
 *                           'spam', 'deleted', or 'lang_id') the given site status(es) will be
 *                           updated. Otherwise, keys and values will be used to set options for
 *                           the new site. Default empty array.
 * @param int    $network_id Optional. Network ID. Only relevant on multi-network installations.
 *                           Default 1.
 * @return int|WP_Error Returns WP_Error object on failure, the new site ID on success.
 */
function wpmu_create_blog( $domain, $path, $title, $user_id, $options = array(), $network_id = 1 ) {
	$defaults = array(
		'public' => 0,
	);
	$options  = wp_parse_args( $options, $defaults );

$title   = strip_tags( $title );
	$user_id = (int) $user_id;

// Check if the domain has been used already. We should return an error message.
	if ( domain_exists( $domain, $path, $network_id ) ) {
		return new WP_Error( 'blog_taken', __( 'Sorry, that site already exists!' ) );
	}

if ( ! wp_installing() ) {
		wp_installing( true );
	}

$allowed_data_fields = array( 'public', 'archived', 'mature', 'spam', 'deleted', 'lang_id' );

$site_data = array_merge(
		array(
			'domain'     => $domain,
			'path'       => $path,
			'network_id' => $network_id,
		),
		array_intersect_key( $options, array_flip( $allowed_data_fields ) )
	);

// Data to pass to wp_initialize_site().
	$site_initialization_data = array(
		'title'   => $title,
		'user_id' => $user_id,
		'options' => array_diff_key( $options, array_flip( $allowed_data_fields ) ),
	);

$blog_id = wp_insert_site( array_merge( $site_data, $site_initialization_data ) );

if ( is_wp_error( $blog_id ) ) {
		return $blog_id;
	}

wp_cache_set_sites_last_changed();

return $blog_id;
}

/**
 * Notifies the network admin that a new site has been activated.
 *
 * Filter {@see 'newblog_notify_siteadmin'} to change the content of
 * the notification email.
 *
 * @since MU (3.0.0)
 * @since 5.1.0 $blog_id now supports input from the {@see 'wp_initialize_site'} action.
 *
 * @param WP_Site|int $blog_id    The new site's object or ID.
 * @param string      $deprecated Not used.
 * @return bool
 */
function newblog_notify_siteadmin( $blog_id, $deprecated = '' ) {
	if ( is_object( $blog_id ) ) {
		$blog_id = $blog_id->blog_id;
	}

if ( 'yes' !== get_site_option( 'registrationnotification' ) ) {
		return false;
	}

$email = get_site_option( 'admin_email' );

if ( ! is_email( $email ) ) {
		return false;
	}

$options_site_url = esc_url( network_admin_url( 'settings.php' ) );

switch_to_blog( $blog_id );
	$blogname = get_option( 'blogname' );
	$siteurl  = site_url();
	restore_current_blog();

$msg = sprintf(
		/* translators: New site notification email. 1: Site URL, 2: User IP address, 3: URL to Network Settings screen. */
		__(
			'New Site: %1$s
URL: %2$s
Remote IP address: %3$s

Disable these notifications: %4$s'
		),
		$blogname,
		$siteurl,
		wp_unslash( $_SERVER['REMOTE_ADDR'] ),
		$options_site_url
	);
	/**
	 * Filters the message body of the new site activation email sent
	 * to the network administrator.
	 *
	 * @since MU (3.0.0)
	 * @since 5.4.0 The `$blog_id` parameter was added.
	 *
	 * @param string     $msg     Email body.
	 * @param int|string $blog_id The new site's ID as an integer or numeric string.
	 */
	$msg = apply_filters( 'newblog_notify_siteadmin', $msg, $blog_id );

/* translators: New site notification email subject. %s: New site URL. */
	wp_mail( $email, sprintf( __( 'New Site Registration: %s' ), $siteurl ), $msg );

return true;
}

/**
 * Notifies the network admin that a new user has been activated.
 *
 * Filter {@see 'newuser_notify_siteadmin'} to change the content of
 * the notification email.
 *
 * @since MU (3.0.0)
 *
 * @param int $user_id The new user's ID.
 * @return bool
 */
function newuser_notify_siteadmin( $user_id ) {
	if ( 'yes' !== get_site_option( 'registrationnotification' ) ) {
		return false;
	}

$email = get_site_option( 'admin_email' );

if ( ! is_email( $email ) ) {
		return false;
	}

$user = get_userdata( $user_id );

$options_site_url = esc_url( network_admin_url( 'settings.php' ) );

$msg = sprintf(
		/* translators: New user notification email. 1: User login, 2: User IP address, 3: URL to Network Settings screen. */
		__(
			'New User: %1$s
Remote IP address: %2$s

Disable these notifications: %3$s'
		),
		$user->user_login,
		wp_unslash( $_SERVER['REMOTE_ADDR'] ),
		$options_site_url
	);

/**
	 * Filters the message body of the new user activation email sent
	 * to the network administrator.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param string  $msg  Email body.
	 * @param WP_User $user WP_User instance of the new user.
	 */
	$msg = apply_filters( 'newuser_notify_siteadmin', $msg, $user );

/* translators: New user notification email subject. %s: User login. */
	wp_mail( $email, sprintf( __( 'New User Registration: %s' ), $user->user_login ), $msg );

return true;
}

/**
 * Checks whether a site name is already taken.
 *
 * The name is the site's subdomain or the site's subdirectory
 * path depending on the network settings.
 *
 * Used during the new site registration process to ensure
 * that each site name is unique.
 *
 * @since MU (3.0.0)
 *
 * @param string $domain     The domain to be checked.
 * @param string $path       The path to be checked.
 * @param int    $network_id Optional. Network ID. Only relevant on multi-network installations.
 *                           Default 1.
 * @return int|null The site ID if the site name exists, null otherwise.
 */
function domain_exists( $domain, $path, $network_id = 1 ) {
	$path   = trailingslashit( $path );
	$args   = array(
		'network_id'             => $network_id,
		'domain'                 => $domain,
		'path'                   => $path,
		'fields'                 => 'ids',
		'number'                 => 1,
		'update_site_meta_cache' => false,
	);
	$result = get_sites( $args );
	$result = array_shift( $result );

/**
	 * Filters whether a site name is taken.
	 *
	 * The name is the site's subdomain or the site's subdirectory
	 * path depending on the network settings.
	 *
	 * @since 3.5.0
	 *
	 * @param int|null $result     The site ID if the site name exists, null otherwise.
	 * @param string   $domain     Domain to be checked.
	 * @param string   $path       Path to be checked.
	 * @param int      $network_id Network ID. Only relevant on multi-network installations.
	 */
	return apply_filters( 'domain_exists', $result, $domain, $path, $network_id );
}

/**
 * Notifies the site administrator that their site activation was successful.
 *
 * Filter {@see 'wpmu_welcome_notification'} to disable or bypass.
 *
 * Filter {@see 'update_welcome_email'} and {@see 'update_welcome_subject'} to
 * modify the content and subject line of the notification email.
 *
 * @since MU (3.0.0)
 *
 * @param int    $blog_id  Site ID.
 * @param int    $user_id  User ID.
 * @param string $password User password, or "N/A" if the user account is not new.
 * @param string $title    Site title.
 * @param array  $meta     Optional. Signup meta data. By default, contains the requested privacy setting and lang_id.
 * @return bool Whether the email notification was sent.
 */
function wpmu_welcome_notification(
	$blog_id,
	$user_id,
	#[\SensitiveParameter]
	$password,
	$title,
	$meta = array()
) {
	$current_network = get_network();

/**
	 * Filters whether to bypass the welcome email sent to the site administrator after site activation.
	 *
	 * Returning false disables the welcome email.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param int|false $blog_id  Site ID, or false to prevent the email from sending.
	 * @param int       $user_id  User ID of the site administrator.
	 * @param string    $password User password, or "N/A" if the user account is not new.
	 * @param string    $title    Site title.
	 * @param array     $meta     Signup meta data. By default, contains the requested privacy setting and lang_id.
	 */
	if ( ! apply_filters( 'wpmu_welcome_notification', $blog_id, $user_id, $password, $title, $meta ) ) {
		return false;
	}

$user = get_userdata( $user_id );

$switched_locale = switch_to_user_locale( $user_id );

$welcome_email = get_site_option( 'welcome_email' );

if ( ! $welcome_email ) {
		/* translators: Do not translate USERNAME, SITE_NAME, BLOG_URL, PASSWORD: those are placeholders. */
		$welcome_email = __(
			'Howdy USERNAME,

Your new SITE_NAME site has been successfully set up at:
BLOG_URL

You can log in to the administrator account with the following information:

Username: USERNAME
Password: PASSWORD
Log in here: BLOG_URLwp-login.php

We hope you enjoy your new site. Thanks!

--The Team @ SITE_NAME'
		);
	}

$url = get_blogaddress_by_id( $blog_id );

$welcome_email = str_replace( 'SITE_NAME', $current_network->site_name, $welcome_email );
	$welcome_email = str_replace( 'BLOG_TITLE', $title, $welcome_email );
	$welcome_email = str_replace( 'BLOG_URL', $url, $welcome_email );
	$welcome_email = str_replace( 'USERNAME', $user->user_login, $welcome_email );
	$welcome_email = str_replace( 'PASSWORD', $password, $welcome_email );

/**
	 * Filters the content of the welcome email sent to the site administrator after site activation.
	 *
	 * Content should be formatted for transmission via wp_mail().
	 *
	 * @since MU (3.0.0)
	 *
	 * @param string $welcome_email Message body of the email.
	 * @param int    $blog_id       Site ID.
	 * @param int    $user_id       User ID of the site administrator.
	 * @param string $password      User password, or "N/A" if the user account is not new.
	 * @param string $title         Site title.
	 * @param array  $meta          Signup meta data. By default, contains the requested privacy setting and lang_id.
	 */
	$welcome_email = apply_filters( 'update_welcome_email', $welcome_email, $blog_id, $user_id, $password, $title, $meta );

$admin_email = get_site_option( 'admin_email' );

if ( '' === $admin_email ) {
		$admin_email = 'support@' . wp_parse_url( network_home_url(), PHP_URL_HOST );
	}

if ( empty( $current_network->site_name ) ) {
		$current_network->site_name = 'WordPress';
	}

/* translators: New site notification email subject. 1: Network title, 2: New site title. */
	$subject = __( 'New %1$s Site: %2$s' );

/**
	 * Filters the subject of the welcome email sent to the site administrator after site activation.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param string $subject Subject of the email.
	 */
	$subject = apply_filters( 'update_welcome_subject', sprintf( $subject, $current_network->site_name, wp_unslash( $title ) ) );

wp_mail( $user->user_email, wp_specialchars_decode( $subject ), $message, $message_headers );

if ( $switched_locale ) {
		restore_previous_locale();
	}

return true;
}

/**
 * Notifies the Multisite network administrator that a new site was created.
 *
 * Filter {@see 'send_new_site_email'} to disable or bypass.
 *
 * Filter {@see 'new_site_email'} to filter the contents.
 *
 * @since 5.6.0
 *
 * @param int $site_id Site ID of the new site.
 * @param int $user_id User ID of the administrator of the new site.
 * @return bool Whether the email notification was sent.
 */
function wpmu_new_site_admin_notification( $site_id, $user_id ) {
	$site  = get_site( $site_id );
	$user  = get_userdata( $user_id );
	$email = get_site_option( 'admin_email' );

if ( ! $site || ! $user || ! $email ) {
		return false;
	}

/**
	 * Filters whether to send an email to the Multisite network administrator when a new site is created.
	 *
	 * Return false to disable sending the email.
	 *
	 * @since 5.6.0
	 *
	 * @param bool    $send Whether to send the email.
	 * @param WP_Site $site Site object of the new site.
	 * @param WP_User $user User object of the administrator of the new site.
	 */
	if ( ! apply_filters( 'send_new_site_email', true, $site, $user ) ) {
		return false;
	}

$switched_locale = false;
	$network_admin   = get_user_by( 'email', $email );

if ( $network_admin ) {
		// If the network admin email address corresponds to a user, switch to their locale.
		$switched_locale = switch_to_user_locale( $network_admin->ID );
	} else {
		// Otherwise switch to the locale of the current site.
		$switched_locale = switch_to_locale( get_locale() );
	}

$subject = sprintf(
		/* translators: New site notification email subject. %s: Network title. */
		__( '[%s] New Site Created' ),
		get_network()->site_name
	);

$message = sprintf(
		/* translators: New site notification email. 1: User login, 2: Site URL, 3: Site title. */
		__(
			'New site created by %1$s

Address: %2$s
Name: %3$s'
		),
		$user->user_login,
		get_site_url( $site->id ),
		get_blog_option( $site->id, 'blogname' )
	);

$header = sprintf(
		'From: "%1$s" <%2$s>',
		_x( 'Site Admin', 'email "From" field' ),
		$email
	);

$new_site_email = array(
		'to'      => $email,
		'subject' => $subject,
		'message' => $message,
		'headers' => $header,
	);

/**
	 * Filters the content of the email sent to the Multisite network administrator when a new site is created.
	 *
	 * Content should be formatted for transmission via wp_mail().
	 *
	 * @since 5.6.0
	 *
	 * @param array $new_site_email {
	 *     Used to build wp_mail().
	 *
	 *     @type string $to      The email address of the recipient.
	 *     @type string $subject The subject of the email.
	 *     @type string $message The content of the email.
	 *     @type string $headers Headers.
	 * }
	 * @param WP_Site $site         Site object of the new site.
	 * @param WP_User $user         User object of the administrator of the new site.
	 */
	$new_site_email = apply_filters( 'new_site_email', $new_site_email, $site, $user );

wp_mail(
		$new_site_email['to'],
		wp_specialchars_decode( $new_site_email['subject'] ),
		$new_site_email['message'],
		$new_site_email['headers']
	);

if ( $switched_locale ) {
		restore_previous_locale();
	}

return true;
}

/**
 * Notifies a user that their account activation has been successful.
 *
 * Filter {@see 'wpmu_welcome_user_notification'} to disable or bypass.
 *
 * Filter {@see 'update_welcome_user_email'} and {@see 'update_welcome_user_subject'} to
 * modify the content and subject line of the notification email.
 *
 * @since MU (3.0.0)
 *
 * @param int    $user_id  User ID.
 * @param string $password User password.
 * @param array  $meta     Optional. Signup meta data. Default empty array.
 * @return bool
 */
function wpmu_welcome_user_notification(
	$user_id,
	#[\SensitiveParameter]
	$password,
	$meta = array()
) {
	$current_network = get_network();

/**
	 * Filters whether to bypass the welcome email after user activation.
	 *
	 * Returning false disables the welcome email.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param int    $user_id  User ID.
	 * @param string $password User password.
	 * @param array  $meta     Signup meta data. Default empty array.
	 */
	if ( ! apply_filters( 'wpmu_welcome_user_notification', $user_id, $password, $meta ) ) {
		return false;
	}

$welcome_email = get_site_option( 'welcome_user_email' );

$user = get_userdata( $user_id );

$switched_locale = switch_to_user_locale( $user_id );

/**
	 * Filters the content of the welcome email after user activation.
	 *
	 * Content should be formatted for transmission via wp_mail().
	 *
	 * @since MU (3.0.0)
	 *
	 * @param string $welcome_email The message body of the account activation success email.
	 * @param int    $user_id       User ID.
	 * @param string $password      User password.
	 * @param array  $meta          Signup meta data. Default empty array.
	 */
	$welcome_email = apply_filters( 'update_welcome_user_email', $welcome_email, $user_id, $password, $meta );
	$welcome_email = str_replace( 'SITE_NAME', $current_network->site_name, $welcome_email );
	$welcome_email = str_replace( 'USERNAME', $user->user_login, $welcome_email );
	$welcome_email = str_replace( 'PASSWORD', $password, $welcome_email );
	$welcome_email = str_replace( 'LOGINLINK', wp_login_url(), $welcome_email );

$admin_email = get_site_option( 'admin_email' );

if ( '' === $admin_email ) {
		$admin_email = 'support@' . wp_parse_url( network_home_url(), PHP_URL_HOST );
	}

if ( empty( $current_network->site_name ) ) {
		$current_network->site_name = 'WordPress';
	}

/* translators: New user notification email subject. 1: Network title, 2: New user login. */
	$subject = __( 'New %1$s User: %2$s' );

/**
	 * Filters the subject of the welcome email after user activation.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param string $subject Subject of the email.
	 */
	$subject = apply_filters( 'update_welcome_user_subject', sprintf( $subject, $current_network->site_name, $user->user_login ) );

wp_mail( $user->user_email, wp_specialchars_decode( $subject ), $message, $message_headers );

if ( $switched_locale ) {
		restore_previous_locale();
	}

return true;
}

/**
 * Gets the current network.
 *
 * Returns an object containing the 'id', 'domain', 'path', and 'site_name'
 * properties of the network being viewed.
 *
 * @see wpmu_current_site()
 *
 * @since MU (3.0.0)
 *
 * @global WP_Network $current_site The current network.
 *
 * @return WP_Network The current network.
 */
function get_current_site() {
	global $current_site;
	return $current_site;
}

/**
 * Gets a user's most recent post.
 *
 * Walks through each of a user's blogs to find the post with
 * the most recent post_date_gmt.
 *
 * @since MU (3.0.0)
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int $user_id User ID.
 * @return array Contains the blog_id, post_id, post_date_gmt, and post_gmt_ts.
 */
function get_most_recent_post_of_user( $user_id ) {
	global $wpdb;

$user_blogs       = get_blogs_of_user( (int) $user_id );
	$most_recent_post = array();

/*
	 * Walk through each blog and get the most recent post
	 * published by $user_id.
	 */
	foreach ( (array) $user_blogs as $blog ) {
		$prefix      = $wpdb->get_blog_prefix( $blog->userblog_id );
		$recent_post = $wpdb->get_row( $wpdb->prepare( "SELECT ID, post_date_gmt FROM {$prefix}posts WHERE post_author = %d AND post_type = 'post' AND post_status = 'publish' ORDER BY post_date_gmt DESC LIMIT 1", $user_id ), ARRAY_A );

// Make sure we found a post.
		if ( isset( $recent_post['ID'] ) ) {
			$post_gmt_ts = strtotime( $recent_post['post_date_gmt'] );

/*
			 * If this is the first post checked
			 * or if this post is newer than the current recent post,
			 * make it the new most recent post.
			 */
			if ( ! isset( $most_recent_post['post_gmt_ts'] ) || ( $post_gmt_ts > $most_recent_post['post_gmt_ts'] ) ) {
				$most_recent_post = array(
					'blog_id'       => $blog->userblog_id,
					'post_id'       => $recent_post['ID'],
					'post_date_gmt' => $recent_post['post_date_gmt'],
					'post_gmt_ts'   => $post_gmt_ts,
				);
			}
		}
	}

return $most_recent_post;
}

//
// Misc functions.
//

/**
 * Checks an array of MIME types against a list of allowed types.
 *
 * WordPress ships with a set of allowed upload filetypes,
 * which is defined in wp-includes/functions.php in
 * get_allowed_mime_types(). This function is used to filter
 * that list against the filetypes allowed provided by Multisite
 * Super Admins at wp-admin/network/settings.php.
 *
 * @since MU (3.0.0)
 *
 * @param array $mimes
 * @return array
 */
function check_upload_mimes( $mimes ) {
	$site_exts  = explode( ' ', get_site_option( 'upload_filetypes', 'jpg jpeg png gif' ) );
	$site_mimes = array();
	foreach ( $site_exts as $ext ) {
		foreach ( $mimes as $ext_pattern => $mime ) {
			if ( '' !== $ext && str_contains( $ext_pattern, $ext ) ) {
				$site_mimes[ $ext_pattern ] = $mime;
			}
		}
	}
	return $site_mimes;
}

/**
 * Updates a blog's post count.
 *
 * WordPress MS stores a blog's post count as an option so as
 * to avoid extraneous COUNTs when a blog's details are fetched
 * with get_site(). This function is called when posts are published
 * or unpublished to make sure the count stays current.
 *
 * @since MU (3.0.0)
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param string $deprecated Not used.
 */
function update_posts_count( $deprecated = '' ) {
	global $wpdb;
	update_option( 'post_count', (int) $wpdb->get_var( "SELECT COUNT(ID) FROM {$wpdb->posts} WHERE post_status = 'publish' and post_type = 'post'" ), true );
}

/**
 * Logs the user email, IP, and registration date of a new site.
 *
 * @since MU (3.0.0)
 * @since 5.1.0 Parameters now support input from the {@see 'wp_initialize_site'} action.
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param WP_Site|int $blog_id The new site's object or ID.
 * @param int|array   $user_id User ID, or array of arguments including 'user_id'.
 */
function wpmu_log_new_registrations( $blog_id, $user_id ) {
	global $wpdb;

if ( is_object( $blog_id ) ) {
		$blog_id = $blog_id->blog_id;
	}

if ( is_array( $user_id ) ) {
		$user_id = ! empty( $user_id['user_id'] ) ? $user_id['user_id'] : 0;
	}

$user = get_userdata( (int) $user_id );
	if ( $user ) {
		$wpdb->insert(
			$wpdb->registration_log,
			array(
				'email'           => $user->user_email,
				'IP'              => preg_replace( '/[^0-9., ]/', '', wp_unslash( $_SERVER['REMOTE_ADDR'] ) ),
				'blog_id'         => $blog_id,
				'date_registered' => current_time( 'mysql' ),
			)
		);
	}
}

/**
 * Ensures that the current site's domain is listed in the allowed redirect host list.
 *
 * @see wp_validate_redirect()
 * @since MU (3.0.0)
 *
 * @param array|string $deprecated Not used.
 * @return string[] {
 *     An array containing the current site's domain.
 *
 *     @type string $0 The current site's domain.
 * }
 */
function redirect_this_site( $deprecated = '' ) {
	return array( get_network()->domain );
}

/**
 * Checks whether an upload is too big.
 *
 * @since MU (3.0.0)
 *
 * @param array $upload An array of information about the newly-uploaded file.
 * @return string|array If the upload is under the size limit, $upload is returned. Otherwise returns an error message.
 */
function upload_is_file_too_big( $upload ) {
	if ( ! is_array( $upload ) || defined( 'WP_IMPORTING' ) || get_site_option( 'upload_space_check_disabled' ) ) {
		return $upload;
	}

if ( strlen( $upload['bits'] ) > ( KB_IN_BYTES * get_site_option( 'fileupload_maxk', 1500 ) ) ) {
		/* translators: %s: Maximum allowed file size in kilobytes. */
		return sprintf( __( 'This file is too big. Files must be less than %s KB in size.' ) . '<br />', get_site_option( 'fileupload_maxk', 1500 ) );
	}

return $upload;
}

/**
 * Adds a nonce field to the signup page.
 *
 * @since MU (3.0.0)
 */
function signup_nonce_fields() {
	$id = mt_rand();
	echo "<input type='hidden' name='signup_form_id' value='{$id}' />";
	wp_nonce_field( 'signup_form_' . $id, '_signup_form', false );
}

/**
 * Processes the signup nonce created in signup_nonce_fields().
 *
 * @since MU (3.0.0)
 *
 * @param array $result
 * @return array
 */
function signup_nonce_check( $result ) {
	if ( ! strpos( $_SERVER['PHP_SELF'], 'wp-signup.php' ) ) {
		return $result;
	}

if ( ! wp_verify_nonce( $_POST['_signup_form'], 'signup_form_' . $_POST['signup_form_id'] ) ) {
		$result['errors']->add( 'invalid_nonce', __( 'Unable to submit this form, please try again.' ) );
	}

return $result;
}

/**
 * Corrects 404 redirects when NOBLOGREDIRECT is defined.
 *
 * @since MU (3.0.0)
 */
function maybe_redirect_404() {
	if ( is_main_site() && is_404() && defined( 'NOBLOGREDIRECT' ) ) {
		/**
		 * Filters the redirect URL for 404s on the main site.
		 *
		 * The filter is only evaluated if the NOBLOGREDIRECT constant is defined.
		 *
		 * @since 3.0.0
		 *
		 * @param string $no_blog_redirect The redirect URL defined in NOBLOGREDIRECT.
		 */
		$destination = apply_filters( 'blog_redirect_404', NOBLOGREDIRECT );

if ( $destination ) {
			if ( '%siteurl%' === $destination ) {
				$destination = network_home_url();
			}

wp_redirect( $destination );
			exit;
		}
	}
}

/**
 * Adds a new user to a blog by visiting /newbloguser/{key}/.
 *
 * This will only work when the user's details are saved as an option
 * keyed as 'new_user_{key}', where '{key}' is a hash generated for the user to be
 * added, as when a user is invited through the regular WP Add User interface.
 *
 * @since MU (3.0.0)
 */
function maybe_add_existing_user_to_blog() {
	if ( ! str_contains( $_SERVER['REQUEST_URI'], '/newbloguser/' ) ) {
		return;
	}

$parts = explode( '/', $_SERVER['REQUEST_URI'] );
	$key   = array_pop( $parts );

if ( '' === $key ) {
		$key = array_pop( $parts );
	}

$details = get_option( 'new_user_' . $key );
	if ( ! empty( $details ) ) {
		delete_option( 'new_user_' . $key );
	}

if ( empty( $details ) || is_wp_error( add_existing_user_to_blog( $details ) ) ) {
		wp_die(
			sprintf(
				/* translators: %s: Home URL. */
				__( 'An error occurred adding you to this site. Go to the <a href="%s">homepage</a>.' ),
				home_url()
			)
		);
	}

wp_die(
		sprintf(
			/* translators: 1: Home URL, 2: Admin URL. */
			__( 'You have been added to this site. Please visit the <a href="%1$s">homepage</a> or <a href="%2$s">log in</a> using your username and password.' ),
			home_url(),
			admin_url()
		),
		__( 'WordPress &rsaquo; Success' ),
		array( 'response' => 200 )
	);
}

/**
 * Adds a user to a blog based on details from maybe_add_existing_user_to_blog().
 *
 * @since MU (3.0.0)
 *
 * @param array|false $details {
 *     User details. Must at least contain values for the keys listed below.
 *
 *     @type int    $user_id The ID of the user being added to the current blog.
 *     @type string $role    The role to be assigned to the user.
 * }
 * @return true|WP_Error|void True on success or a WP_Error object if the user doesn't exist
 *                            or could not be added. Void if $details array was not provided.
 */
function add_existing_user_to_blog( $details = false ) {
	if ( is_array( $details ) ) {
		$blog_id = get_current_blog_id();
		$result  = add_user_to_blog( $blog_id, $details['user_id'], $details['role'] );

/**
		 * Fires immediately after an existing user is added to a site.
		 *
		 * @since MU (3.0.0)
		 *
		 * @param int           $user_id User ID.
		 * @param true|WP_Error $result  True on success or a WP_Error object if the user doesn't exist
		 *                               or could not be added.
		 */
		do_action( 'added_existing_user', $details['user_id'], $result );

return $result;
	}
}

/**
 * Adds a newly created user to the appropriate blog
 *
 * To add a user in general, use add_user_to_blog(). This function
 * is specifically hooked into the {@see 'wpmu_activate_user'} action.
 *
 * @since MU (3.0.0)
 *
 * @see add_user_to_blog()
 *
 * @param int    $user_id  User ID.
 * @param string $password User password. Ignored.
 * @param array  $meta     Signup meta data.
 */
function add_new_user_to_blog(
	$user_id,
	#[\SensitiveParameter]
	$password,
	$meta
) {
	if ( ! empty( $meta['add_to_blog'] ) ) {
		$blog_id = $meta['add_to_blog'];
		$role    = $meta['new_role'];
		remove_user_from_blog( $user_id, get_network()->site_id ); // Remove user from main blog.

$result = add_user_to_blog( $blog_id, $user_id, $role );

if ( ! is_wp_error( $result ) ) {
			update_user_meta( $user_id, 'primary_blog', $blog_id );
		}
	}
}

/**
 * Corrects From host on outgoing mail to match the site domain.
 *
 * @since MU (3.0.0)
 *
 * @param PHPMailer\PHPMailer\PHPMailer $phpmailer The PHPMailer instance (passed by reference).
 */
function fix_phpmailer_messageid( $phpmailer ) {
	$phpmailer->Hostname = get_network()->domain;
}

/**
 * Determines whether a user is marked as a spammer, based on user login.
 *
 * @since MU (3.0.0)
 *
 * @param string|WP_User $user Optional. Defaults to current user. WP_User object,
 *                             or user login name as a string.
 * @return bool
 */
function is_user_spammy( $user = null ) {
	if ( ! ( $user instanceof WP_User ) ) {
		if ( $user ) {
			$user = get_user_by( 'login', $user );
		} else {
			$user = wp_get_current_user();
		}
	}

return $user && isset( $user->spam ) && '1' === $user->spam;
}

/**
 * Updates this blog's 'public' setting in the global blogs table.
 *
 * Public blogs have a setting of 1, private blogs are 0.
 *
 * @since MU (3.0.0)
 *
 * @param int $old_value The old public value.
 * @param int $value     The new public value.
 */
function update_blog_public( $old_value, $value ) {
	update_blog_status( get_current_blog_id(), 'public', (int) $value );
}

/**
 * Determines whether users can self-register, based on Network settings.
 *
 * @since MU (3.0.0)
 *
 * @return bool
 */
function users_can_register_signup_filter() {
	$registration = get_site_option( 'registration' );
	return ( 'all' === $registration || 'user' === $registration );
}

/**
 * Ensures that the welcome message is not empty. Currently unused.
 *
 * @since MU (3.0.0)
 *
 * @param string $text
 * @return string
 */
function welcome_user_msg_filter( $text ) {
	if ( ! $text ) {
		remove_filter( 'site_option_welcome_user_email', 'welcome_user_msg_filter' );

/* translators: Do not translate USERNAME, PASSWORD, LOGINLINK, SITE_NAME: those are placeholders. */
		$text = __(
			'Howdy USERNAME,

Your new account is set up.

You can log in with the following information:
Username: USERNAME
Password: PASSWORD
LOGINLINK

Thanks!

--The Team @ SITE_NAME'
		);
		update_site_option( 'welcome_user_email', $text );
	}
	return $text;
}

/**
 * Determines whether to force SSL on content.
 *
 * @since 2.8.5
 *
 * @param bool $force
 * @return bool True if forced, false if not forced.
 */
function force_ssl_content( $force = '' ) {
	static $forced_content = false;

if ( ! $force ) {
		$old_forced     = $forced_content;
		$forced_content = $force;
		return $old_forced;
	}

return $forced_content;
}

/**
 * Formats a URL to use https.
 *
 * Useful as a filter.
 *
 * @since 2.8.5
 *
 * @param string $url URL.
 * @return string URL with https as the scheme.
 */
function filter_SSL( $url ) {  // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
	if ( ! is_string( $url ) ) {
		return get_bloginfo( 'url' ); // Return home site URL with proper scheme.
	}

if ( force_ssl_content() && is_ssl() ) {
		$url = set_url_scheme( $url, 'https' );
	}

return $url;
}

/**
 * Schedules update of the network-wide counts for the current network.
 *
 * @since 3.1.0
 */
function wp_schedule_update_network_counts() {
	if ( ! is_main_site() ) {
		return;
	}

if ( ! wp_next_scheduled( 'update_network_counts' ) && ! wp_installing() ) {
		wp_schedule_event( time(), 'twicedaily', 'update_network_counts' );
	}
}

/**
 * Updates the network-wide counts for the current network.
 *
 * @since 3.1.0
 * @since 4.8.0 The `$network_id` parameter has been added.
 *
 * @param int|null $network_id ID of the network. Default is the current network.
 */
function wp_update_network_counts( $network_id = null ) {
	wp_update_network_user_counts( $network_id );
	wp_update_network_site_counts( $network_id );
}

/**
 * Updates the count of sites for the current network.
 *
 * If enabled through the {@see 'enable_live_network_counts'} filter, update the sites count
 * on a network when a site is created or its status is updated.
 *
 * @since 3.7.0
 * @since 4.8.0 The `$network_id` parameter has been added.
 *
 * @param int|null $network_id ID of the network. Default is the current network.
 */
function wp_maybe_update_network_site_counts( $network_id = null ) {
	$is_small_network = ! wp_is_large_network( 'sites', $network_id );

/**
	 * Filters whether to update network site or user counts when a new site is created.
	 *
	 * @since 3.7.0
	 *
	 * @see wp_is_large_network()
	 *
	 * @param bool   $small_network Whether the network is considered small.
	 * @param string $context       Context. Either 'users' or 'sites'.
	 */
	if ( ! apply_filters( 'enable_live_network_counts', $is_small_network, 'sites' ) ) {
		return;
	}

wp_update_network_site_counts( $network_id );
}

/**
 * Updates the network-wide users count.
 *
 * If enabled through the {@see 'enable_live_network_counts'} filter, update the users count
 * on a network when a user is created or its status is updated.
 *
 * @since 3.7.0
 * @since 4.8.0 The `$network_id` parameter has been added.
 *
 * @param int|null $network_id ID of the network. Default is the current network.
 */
function wp_maybe_update_network_user_counts( $network_id = null ) {
	$is_small_network = ! wp_is_large_network( 'users', $network_id );

/** This filter is documented in wp-includes/ms-functions.php */
	if ( ! apply_filters( 'enable_live_network_counts', $is_small_network, 'users' ) ) {
		return;
	}

wp_update_network_user_counts( $network_id );
}

/**
 * Updates the network-wide site count.
 *
 * @since 3.7.0
 * @since 4.8.0 The `$network_id` parameter has been added.
 *
 * @param int|null $network_id ID of the network. Default is the current network.
 */
function wp_update_network_site_counts( $network_id = null ) {
	$network_id = (int) $network_id;
	if ( ! $network_id ) {
		$network_id = get_current_network_id();
	}

$count = get_sites(
		array(
			'network_id'             => $network_id,
			'spam'                   => 0,
			'deleted'                => 0,
			'archived'               => 0,
			'count'                  => true,
			'update_site_meta_cache' => false,
		)
	);

update_network_option( $network_id, 'blog_count', $count );
}

/**
 * Updates the network-wide user count.
 *
 * @since 3.7.0
 * @since 4.8.0 The `$network_id` parameter has been added.
 * @since 6.0.0 This function is now a wrapper for wp_update_user_counts().
 *
 * @param int|null $network_id ID of the network. Default is the current network.
 */
function wp_update_network_user_counts( $network_id = null ) {
	wp_update_user_counts( $network_id );
}

/**
 * Returns the space used by the current site.
 *
 * @since 3.5.0
 *
 * @return int Used space in megabytes.
 */
function get_space_used() {
	/**
	 * Filters the amount of storage space used by the current site, in megabytes.
	 *
	 * @since 3.5.0
	 *
	 * @param int|false $space_used The amount of used space, in megabytes. Default false.
	 */
	$space_used = apply_filters( 'pre_get_space_used', false );

if ( false === $space_used ) {
		$upload_dir = wp_upload_dir();
		$space_used = get_dirsize( $upload_dir['basedir'] ) / MB_IN_BYTES;
	}

return $space_used;
}

/**
 * Returns the upload quota for the current blog.
 *
 * @since MU (3.0.0)
 *
 * @return int Quota in megabytes.
 */
function get_space_allowed() {
	$space_allowed = get_option( 'blog_upload_space' );

if ( ! is_numeric( $space_allowed ) ) {
		$space_allowed = get_site_option( 'blog_upload_space' );
	}

if ( ! is_numeric( $space_allowed ) ) {
		$space_allowed = 100;
	}

/**
	 * Filters the upload quota for the current site.
	 *
	 * @since 3.7.0
	 *
	 * @param int $space_allowed Upload quota in megabytes for the current blog.
	 */
	return apply_filters( 'get_space_allowed', $space_allowed );
}

/**
 * Determines if there is any upload space left in the current blog's quota.
 *
 * @since 3.0.0
 *
 * @return int of upload space available in bytes.
 */
function get_upload_space_available() {
	$allowed = get_space_allowed();
	if ( $allowed < 0 ) {
		$allowed = 0;
	}
	$space_allowed = $allowed * MB_IN_BYTES;
	if ( get_site_option( 'upload_space_check_disabled' ) ) {
		return $space_allowed;
	}

$space_used = get_space_used() * MB_IN_BYTES;

if ( ( $space_allowed - $space_used ) <= 0 ) {
		return 0;
	}

return $space_allowed - $space_used;
}

/**
 * Determines if there is any upload space left in the current blog's quota.
 *
 * @since 3.0.0
 * @return bool True if space is available, false otherwise.
 */
function is_upload_space_available() {
	if ( get_site_option( 'upload_space_check_disabled' ) ) {
		return true;
	}

return (bool) get_upload_space_available();
}

/**
 * Filters the maximum upload file size allowed, in bytes.
 *
 * @since 3.0.0
 *
 * @param int $size Upload size limit in bytes.
 * @return int Upload size limit in bytes.
 */
function upload_size_limit_filter( $size ) {
	$fileupload_maxk         = (int) get_site_option( 'fileupload_maxk', 1500 );
	$max_fileupload_in_bytes = KB_IN_BYTES * $fileupload_maxk;

if ( get_site_option( 'upload_space_check_disabled' ) ) {
		return min( $size, $max_fileupload_in_bytes );
	}

return min( $size, $max_fileupload_in_bytes, get_upload_space_available() );
}

/**
 * Determines whether or not we have a large network.
 *
 * The default criteria for a large network is either more than 10,000 users or more than 10,000 sites.
 * Plugins can alter this criteria using the {@see 'wp_is_large_network'} filter.
 *
 * @since 3.3.0
 * @since 4.8.0 The `$network_id` parameter has been added.
 *
 * @param string   $using      'sites' or 'users'. Default is 'sites'.
 * @param int|null $network_id ID of the network. Default is the current network.
 * @return bool True if the network meets the criteria for large. False otherwise.
 */
function wp_is_large_network( $using = 'sites', $network_id = null ) {
	$network_id = (int) $network_id;
	if ( ! $network_id ) {
		$network_id = get_current_network_id();
	}

if ( 'users' === $using ) {
		$count = get_user_count( $network_id );

$is_large_network = wp_is_large_user_count( $network_id );

/**
		 * Filters whether the network is considered large.
		 *
		 * @since 3.3.0
		 * @since 4.8.0 The `$network_id` parameter has been added.
		 *
		 * @param bool   $is_large_network Whether the network has more than 10000 users or sites.
		 * @param string $component        The component to count. Accepts 'users', or 'sites'.
		 * @param int    $count            The count of items for the component.
		 * @param int    $network_id       The ID of the network being checked.
		 */
		return apply_filters( 'wp_is_large_network', $is_large_network, 'users', $count, $network_id );
	}

$count = get_blog_count( $network_id );

/** This filter is documented in wp-includes/ms-functions.php */
	return apply_filters( 'wp_is_large_network', $count > 10000, 'sites', $count, $network_id );
}

/**
 * Retrieves a list of reserved site on a sub-directory Multisite installation.
 *
 * @since 4.4.0
 *
 * @return string[] Array of reserved names.
 */
function get_subdirectory_reserved_names() {
	$names = array(
		'page',
		'comments',
		'blog',
		'files',
		'feed',
		'wp-admin',
		'wp-content',
		'wp-includes',
		'wp-json',
		'embed',
	);

/**
	 * Filters reserved site names on a sub-directory Multisite installation.
	 *
	 * @since 3.0.0
	 * @since 4.4.0 'wp-admin', 'wp-content', 'wp-includes', 'wp-json', and 'embed' were added
	 *              to the reserved names list.
	 *
	 * @param string[] $subdirectory_reserved_names Array of reserved names.
	 */
	return apply_filters( 'subdirectory_reserved_names', $names );
}

/**
 * Sends a confirmation request email when a change of network admin email address is attempted.
 *
 * The new network admin address will not become active until confirmed.
 *
 * @since 4.9.0
 *
 * @param string $old_value The old network admin email address.
 * @param string $value     The proposed new network admin email address.
 */
function update_network_option_new_admin_email( $old_value, $value ) {
	if ( get_site_option( 'admin_email' ) === $value || ! is_email( $value ) ) {
		return;
	}

$hash            = md5( $value . time() . mt_rand() );
	$new_admin_email = array(
		'hash'     => $hash,
		'newemail' => $value,
	);
	update_site_option( 'network_admin_hash', $new_admin_email );

$switched_locale = switch_to_user_locale( get_current_user_id() );

/* translators: Do not translate USERNAME, ADMIN_URL, EMAIL, SITENAME, SITEURL: those are placeholders. */
	$email_text = __(
		'Howdy ###USERNAME###,

You recently requested to have the network admin email address on
your network changed.

If this is correct, please click on the following link to change it:
###ADMIN_URL###

You can safely ignore and delete this email if you do not want to
take this action.

This email has been sent to ###EMAIL###

Regards,
All at ###SITENAME###
###SITEURL###'
	);

/**
	 * Filters the text of the email sent when a change of network admin email address is attempted.
	 *
	 * The following strings have a special meaning and will get replaced dynamically:
	 * ###USERNAME###  The current user's username.
	 * ###ADMIN_URL### The link to click on to confirm the email change.
	 * ###EMAIL###     The proposed new network admin email address.
	 * ###SITENAME###  The name of the network.
	 * ###SITEURL###   The URL to the network.
	 *
	 * @since 4.9.0
	 *
	 * @param string $email_text      Text in the email.
	 * @param array  $new_admin_email {
	 *     Data relating to the new network admin email address.
	 *
	 *     @type string $hash     The secure hash used in the confirmation link URL.
	 *     @type string $newemail The proposed new network admin email address.
	 * }
	 */
	$content = apply_filters( 'new_network_admin_email_content', $email_text, $new_admin_email );

$current_user = wp_get_current_user();
	$content      = str_replace( '###USERNAME###', $current_user->user_login, $content );
	$content      = str_replace( '###ADMIN_URL###', esc_url( network_admin_url( 'settings.php?network_admin_hash=' . $hash ) ), $content );
	$content      = str_replace( '###EMAIL###', $value, $content );
	$content      = str_replace( '###SITENAME###', wp_specialchars_decode( get_site_option( 'site_name' ), ENT_QUOTES ), $content );
	$content      = str_replace( '###SITEURL###', network_home_url(), $content );

wp_mail(
		$value,
		sprintf(
			/* translators: Email change notification email subject. %s: Network title. */
			__( '[%s] Network Admin Email Change Request' ),
			wp_specialchars_decode( get_site_option( 'site_name' ), ENT_QUOTES )
		),
		$content
	);

if ( $switched_locale ) {
		restore_previous_locale();
	}
}

/**
 * Sends an email to the old network admin email address when the network admin email address changes.
 *
 * @since 4.9.0
 *
 * @param string $option_name The relevant database option name.
 * @param string $new_email   The new network admin email address.
 * @param string $old_email   The old network admin email address.
 * @param int    $network_id  ID of the network.
 */
function wp_network_admin_email_change_notification( $option_name, $new_email, $old_email, $network_id ) {
	$send = true;

// Don't send the notification to the default 'admin_email' value.
	if ( 'you@example.com' === $old_email ) {
		$send = false;
	}

/**
	 * Filters whether to send the network admin email change notification email.
	 *
	 * @since 4.9.0
	 *
	 * @param bool   $send       Whether to send the email notification.
	 * @param string $old_email  The old network admin email address.
	 * @param string $new_email  The new network admin email address.
	 * @param int    $network_id ID of the network.
	 */
	$send = apply_filters( 'send_network_admin_email_change_email', $send, $old_email, $new_email, $network_id );

if ( ! $send ) {
		return;
	}

/* translators: Do not translate OLD_EMAIL, NEW_EMAIL, SITENAME, SITEURL: those are placeholders. */
	$email_change_text = __(
		'Hi,

This notice confirms that the network admin email address was changed on ###SITENAME###.

The new network admin email address is ###NEW_EMAIL###.

This email has been sent to ###OLD_EMAIL###

Regards,
All at ###SITENAME###
###SITEURL###'
	);

$email_change_email = array(
		'to'      => $old_email,
		/* translators: Network admin email change notification email subject. %s: Network title. */
		'subject' => __( '[%s] Network Admin Email Changed' ),
		'message' => $email_change_text,
		'headers' => '',
	);
	// Get network name.
	$network_name = wp_specialchars_decode( get_site_option( 'site_name' ), ENT_QUOTES );

/**
	 * Filters the contents of the email notification sent when the network admin email address is changed.
	 *
	 * @since 4.9.0
	 *
	 * @param array $email_change_email {
	 *     Used to build wp_mail().
	 *
	 *     @type string $to      The intended recipient.
	 *     @type string $subject The subject of the email.
	 *     @type string $message The content of the email.
	 *         The following strings have a special meaning and will get replaced dynamically:
	 *         - ###OLD_EMAIL### The old network admin email address.
	 *         - ###NEW_EMAIL### The new network admin email address.
	 *         - ###SITENAME###  The name of the network.
	 *         - ###SITEURL###   The URL to the site.
	 *     @type string $headers Headers.
	 * }
	 * @param string $old_email  The old network admin email address.
	 * @param string $new_email  The new network admin email address.
	 * @param int    $network_id ID of the network.
	 */
	$email_change_email = apply_filters( 'network_admin_email_change_email', $email_change_email, $old_email, $new_email, $network_id );

$email_change_email['message'] = str_replace( '###OLD_EMAIL###', $old_email, $email_change_email['message'] );
	$email_change_email['message'] = str_replace( '###NEW_EMAIL###', $new_email, $email_change_email['message'] );
	$email_change_email['message'] = str_replace( '###SITENAME###', $network_name, $email_change_email['message'] );
	$email_change_email['message'] = str_replace( '###SITEURL###', home_url(), $email_change_email['message'] );

wp_mail(
		$email_change_email['to'],
		sprintf(
			$email_change_email['subject'],
			$network_name
		),
		$email_change_email['message'],
		$email_change_email['headers']
	);
}

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