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Multisite WordPress API
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| get_sitestats() X-Ref |
| Gets the network's site and user counts. return: int[] { since: MU (3.0.0) |
| get_active_blog_for_user( $user_id ) X-Ref |
| 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. param: int $user_id The unique ID of the user return: WP_Site|void The blog object since: MU (3.0.0) |
| get_blog_count( $network_id = null ) X-Ref |
| Gets the number of active sites on the installation. The count is cached and updated twice daily. This is not a live count. param: int|null $network_id ID of the network. Default is the current network. return: int Number of active sites on the network. since: MU (3.0.0) since: 3.7.0 The `$network_id` parameter has been deprecated. since: 4.8.0 The `$network_id` parameter is now being used. |
| get_blog_post( $blog_id, $post_id ) X-Ref |
| 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. 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 since: MU (3.0.0) |
| add_user_to_blog( $blog_id, $user_id, $role ) X-Ref |
| 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. 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 The role you want the user to have. return: true|WP_Error True on success or a WP_Error object if the user doesn't exist since: MU (3.0.0) |
| remove_user_from_blog( $user_id, $blog_id = 0, $reassign = 0 ) X-Ref |
| Removes a user from a blog. Use the {@see 'remove_user_from_blog'} action to fire an event when users are removed from a blog. Accepts an optional `$reassign` parameter, if you want to reassign the user's blog posts to another user upon removal. 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. since: MU (3.0.0) |
| get_blog_permalink( $blog_id, $post_id ) X-Ref |
| Gets the permalink for a post on another blog. param: int $blog_id ID of the source blog. param: int $post_id ID of the desired post. return: string The post's permalink since: MU (3.0.0) 1.0 |
| get_blog_id_from_url( $domain, $path = '/' ) X-Ref |
| 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 '/'. param: string $domain param: string $path Optional. Not required for subdomain installations. return: int 0 if no blog found, otherwise the ID of the matching blog since: MU (3.0.0) |
| is_email_address_unsafe( $user_email ) X-Ref |
| 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. param: string $user_email The email provided by the user at registration. return: bool True when the email address is banned, false otherwise. since: MU (3.0.0) |
| wpmu_validate_user_signup( $user_name, $user_email ) X-Ref |
| 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. param: string $user_name The login name provided by the user. param: string $user_email The email provided by the user. return: array { since: MU (3.0.0) |
| wpmu_validate_blog_signup( $blogname, $blog_title, $user = '' ) X-Ref |
| 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. param: string $blogname The blog name provided by the user. Must be unique. param: string $blog_title The blog title provided by the user. param: WP_User|string $user Optional. The user object to check against the new site name. return: array { since: MU (3.0.0) |
| wpmu_signup_blog( $domain, $path, $title, $user, $user_email, $meta = array() X-Ref |
| Records site signup information for future activation. 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. since: MU (3.0.0) |
| wpmu_signup_user( $user, $user_email, $meta = array() X-Ref |
| Records user signup information for future activation. This function is used when user registration is open but new site registration is not. 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. since: MU (3.0.0) |
| wpmu_signup_blog_notification( $domain, $path, $title, $user_login, $user_email, $key, $meta = array() X-Ref |
| 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. 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 since: MU (3.0.0) |
| wpmu_signup_user_notification( $user_login, $user_email, $key, $meta = array() X-Ref |
| 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. 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 since: MU (3.0.0) |
| wpmu_activate_signup( $key ) X-Ref |
| 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). 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 since: MU (3.0.0) |
| wp_delete_signup_on_user_delete( $id, $reassign, $user ) X-Ref |
| Deletes an associated signup entry when a user is deleted from the database. 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. since: 5.5.0 |
| wpmu_create_user( $user_name, $password, $email ) X-Ref |
| 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'}). 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 since: MU (3.0.0) |
| wpmu_create_blog( $domain, $path, $title, $user_id, $options = array() X-Ref |
| 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 '/'. 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. param: int $network_id Optional. Network ID. Only relevant on multi-network installations. return: int|WP_Error Returns WP_Error object on failure, the new site ID on success. since: MU (3.0.0) |
| newblog_notify_siteadmin( $blog_id, $deprecated = '' ) X-Ref |
| Notifies the network admin that a new site has been activated. Filter {@see 'newblog_notify_siteadmin'} to change the content of the notification email. param: WP_Site|int $blog_id The new site's object or ID. param: string $deprecated Not used. return: bool since: MU (3.0.0) since: 5.1.0 $blog_id now supports input from the {@see 'wp_initialize_site'} action. |
| newuser_notify_siteadmin( $user_id ) X-Ref |
| Notifies the network admin that a new user has been activated. Filter {@see 'newuser_notify_siteadmin'} to change the content of the notification email. param: int $user_id The new user's ID. return: bool since: MU (3.0.0) |
| domain_exists( $domain, $path, $network_id = 1 ) X-Ref |
| 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. param: string $domain The domain to be checked. param: string $path The path to be checked. param: int $network_id Optional. Network ID. Relevant only on multi-network installations. return: int|null The site ID if the site name exists, null otherwise. since: MU (3.0.0) |
| wpmu_welcome_notification( $blog_id, $user_id, $password, $title, $meta = array() X-Ref |
| 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. 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. since: MU (3.0.0) |
| wpmu_new_site_admin_notification( $site_id, $user_id ) X-Ref |
| 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. 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. since: 5.6.0 |
| wpmu_welcome_user_notification( $user_id, $password, $meta = array() X-Ref |
| 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. param: int $user_id User ID. param: string $password User password. param: array $meta Optional. Signup meta data. Default empty array. return: bool since: MU (3.0.0) |
| get_current_site() X-Ref |
| Gets the current network. Returns an object containing the 'id', 'domain', 'path', and 'site_name' properties of the network being viewed. return: WP_Network since: MU (3.0.0) |
| get_most_recent_post_of_user( $user_id ) X-Ref |
| 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. param: int $user_id return: array Contains the blog_id, post_id, post_date_gmt, and post_gmt_ts since: MU (3.0.0) |
| check_upload_mimes( $mimes ) X-Ref |
| 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. param: array $mimes return: array since: MU (3.0.0) |
| update_posts_count( $deprecated = '' ) X-Ref |
| 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. param: string $deprecated Not used. since: MU (3.0.0) |
| wpmu_log_new_registrations( $blog_id, $user_id ) X-Ref |
| Logs the user email, IP, and registration date of a new site. 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'. since: MU (3.0.0) since: 5.1.0 Parameters now support input from the {@see 'wp_initialize_site'} action. |
| global_terms( $term_id, $deprecated = '' ) X-Ref |
| Maintains a canonical list of terms by syncing terms created for each blog with the global terms table. param: int $term_id An ID for a term on the current blog. param: string $deprecated Not used. return: int An ID from the global terms table mapped from $term_id. since: 3.0.0 |
| redirect_this_site( $deprecated = '' ) X-Ref |
| Ensures that the current site's domain is listed in the allowed redirect host list. param: array|string $deprecated Not used. return: string[] { since: MU (3.0.0) |
| upload_is_file_too_big( $upload ) X-Ref |
| Checks whether an upload is too big. param: array $upload return: string|array If the upload is under the size limit, $upload is returned. Otherwise returns an error message. since: MU (3.0.0) |
| signup_nonce_fields() X-Ref |
| Adds a nonce field to the signup page. since: MU (3.0.0) |
| signup_nonce_check( $result ) X-Ref |
| Processes the signup nonce created in signup_nonce_fields(). param: array $result return: array since: MU (3.0.0) |
| maybe_redirect_404() X-Ref |
| Corrects 404 redirects when NOBLOGREDIRECT is defined. since: MU (3.0.0) |
| maybe_add_existing_user_to_blog() X-Ref |
| 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) |
| add_existing_user_to_blog( $details = false ) X-Ref |
| Adds a user to a blog based on details from maybe_add_existing_user_to_blog(). param: array|false $details { return: true|WP_Error|void True on success or a WP_Error object if the user doesn't exist since: MU (3.0.0) |
| add_new_user_to_blog( $user_id, $password, $meta ) X-Ref |
| 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. param: int $user_id User ID. param: string $password User password. Ignored. param: array $meta Signup meta data. since: MU (3.0.0) |
| fix_phpmailer_messageid( $phpmailer ) X-Ref |
| Corrects From host on outgoing mail to match the site domain param: PHPMailer $phpmailer The PHPMailer instance (passed by reference). since: MU (3.0.0) |
| is_user_spammy( $user = null ) X-Ref |
| Determines whether a user is marked as a spammer, based on user login. param: string|WP_User $user Optional. Defaults to current user. WP_User object, return: bool since: MU (3.0.0) |
| update_blog_public( $old_value, $value ) X-Ref |
| Updates this blog's 'public' setting in the global blogs table. Public blogs have a setting of 1, private blogs are 0. param: int $old_value param: int $value The new public value since: MU (3.0.0) |
| users_can_register_signup_filter() X-Ref |
| Determines whether users can self-register, based on Network settings. return: bool since: MU (3.0.0) |
| welcome_user_msg_filter( $text ) X-Ref |
| Ensures that the welcome message is not empty. Currently unused. param: string $text return: string since: MU (3.0.0) |
| force_ssl_content( $force = '' ) X-Ref |
| Determines whether to force SSL on content. param: bool $force return: bool True if forced, false if not forced. since: 2.8.5 |
| filter_SSL( $url ) X-Ref |
| Formats a URL to use https. Useful as a filter. param: string $url URL return: string URL with https as the scheme since: 2.8.5 |
| wp_schedule_update_network_counts() X-Ref |
| Schedules update of the network-wide counts for the current network. since: 3.1.0 |
| wp_update_network_counts( $network_id = null ) X-Ref |
| Updates the network-wide counts for the current network. param: int|null $network_id ID of the network. Default is the current network. since: 3.1.0 since: 4.8.0 The `$network_id` parameter has been added. |
| wp_maybe_update_network_site_counts( $network_id = null ) X-Ref |
| 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. param: int|null $network_id ID of the network. Default is the current network. since: 3.7.0 since: 4.8.0 The `$network_id` parameter has been added. |
| wp_maybe_update_network_user_counts( $network_id = null ) X-Ref |
| 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. param: int|null $network_id ID of the network. Default is the current network. since: 3.7.0 since: 4.8.0 The `$network_id` parameter has been added. |
| wp_update_network_site_counts( $network_id = null ) X-Ref |
| Updates the network-wide site count. param: int|null $network_id ID of the network. Default is the current network. since: 3.7.0 since: 4.8.0 The `$network_id` parameter has been added. |
| wp_update_network_user_counts( $network_id = null ) X-Ref |
| Updates the network-wide user count. param: int|null $network_id ID of the network. Default is the current network. since: 3.7.0 since: 4.8.0 The `$network_id` parameter has been added. since: 6.0.0 This function is now a wrapper for wp_update_user_counts(). |
| get_space_used() X-Ref |
| Returns the space used by the current site. return: int Used space in megabytes. since: 3.5.0 |
| get_space_allowed() X-Ref |
| Returns the upload quota for the current blog. return: int Quota in megabytes since: MU (3.0.0) |
| get_upload_space_available() X-Ref |
| Determines if there is any upload space left in the current blog's quota. return: int of upload space available in bytes since: 3.0.0 |
| is_upload_space_available() X-Ref |
| Determines if there is any upload space left in the current blog's quota. return: bool True if space is available, false otherwise. since: 3.0.0 |
| upload_size_limit_filter( $size ) X-Ref |
| Filters the maximum upload file size allowed, in bytes. param: int $size Upload size limit in bytes. return: int Upload size limit in bytes. since: 3.0.0 |
| wp_is_large_network( $using = 'sites', $network_id = null ) X-Ref |
| 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. param: string $using 'sites or 'users'. Default is 'sites'. param: int|null $network_id ID of the network. Default is the current network. return: bool True if the network meets the criteria for large. False otherwise. since: 3.3.0 since: 4.8.0 The `$network_id` parameter has been added. |
| get_subdirectory_reserved_names() X-Ref |
| Retrieves a list of reserved site on a sub-directory Multisite installation. return: string[] Array of reserved names. since: 4.4.0 |
| update_network_option_new_admin_email( $old_value, $value ) X-Ref |
| 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. param: string $old_value The old network admin email address. param: string $value The proposed new network admin email address. since: 4.9.0 |
| wp_network_admin_email_change_notification( $option_name, $new_email, $old_email, $network_id ) X-Ref |
| Sends an email to the old network admin email address when the network admin email address changes. 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. since: 4.9.0 |
| Generated: Tue Dec 31 01:00:02 2024 | Cross-referenced by PHPXref 0.7.1 |