Title: MU | Page 5 of 6 | Developer.WordPress.org --- # New and updated in MU Functions Hooks Classes Methods * function[get_user_details()](https://developer.wordpress.org/reference/functions/get_user_details/) * Deprecated functionality to retrieve user information. * Used by [0 functions](https://developer.wordpress.org/reference/functions/get_user_details/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/get_user_details/#uses) | Source: [wp-includes/ms-deprecated.php:129](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-deprecated.php#L129-L132) * function[clear_global_post_cache()](https://developer.wordpress.org/reference/functions/clear_global_post_cache/) * Deprecated functionality to clear the global post cache. * Used by [0 functions](https://developer.wordpress.org/reference/functions/clear_global_post_cache/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/clear_global_post_cache/#uses) | Source: [wp-includes/ms-deprecated.php:143](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-deprecated.php#L143-L145) * function[is_main_blog()](https://developer.wordpress.org/reference/functions/is_main_blog/) * Deprecated functionality to determine if the current site is the main site. * Used by [0 functions](https://developer.wordpress.org/reference/functions/is_main_blog/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/is_main_blog/#uses) | Source: [wp-includes/ms-deprecated.php:154](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-deprecated.php#L154-L157) * function[validate_email()](https://developer.wordpress.org/reference/functions/validate_email/) * Deprecated functionality to validate an email address. * Used by [0 functions](https://developer.wordpress.org/reference/functions/validate_email/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/validate_email/#uses) | Source: [wp-includes/ms-deprecated.php:170](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-deprecated.php#L170-L173) * function[get_blog_list()](https://developer.wordpress.org/reference/functions/get_blog_list/) * Deprecated functionality to retrieve a list of all sites. * Used by [1 function](https://developer.wordpress.org/reference/functions/get_blog_list/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/get_blog_list/#uses) | Source: [wp-includes/ms-deprecated.php:188](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-deprecated.php#L188-L209) * function[get_most_active_blogs()](https://developer.wordpress.org/reference/functions/get_most_active_blogs/) * Deprecated functionality to retrieve a list of the most active sites. * Used by [0 functions](https://developer.wordpress.org/reference/functions/get_most_active_blogs/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/get_most_active_blogs/#uses) | Source: [wp-includes/ms-deprecated.php:221](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-deprecated.php#L221-L253) * function[wpmu_admin_do_redirect()](https://developer.wordpress.org/reference/functions/wpmu_admin_do_redirect/) * Redirect a user based on $_GET or $_POST arguments. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wpmu_admin_do_redirect/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/wpmu_admin_do_redirect/#uses) | Source: [wp-includes/ms-deprecated.php:272](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-deprecated.php#L272-L305) * function[generate_random_password()](https://developer.wordpress.org/reference/functions/generate_random_password/) * Generates a random password. * Used by [0 functions](https://developer.wordpress.org/reference/functions/generate_random_password/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/generate_random_password/#uses) | Source: [wp-includes/ms-deprecated.php:44](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-deprecated.php#L44-L47) * function[wpmu_admin_redirect_add_updated_param()](https://developer.wordpress.org/reference/functions/wpmu_admin_redirect_add_updated_param/) * Adds an ‘updated=true’ argument to a URL. * Used by [1 function](https://developer.wordpress.org/reference/functions/wpmu_admin_redirect_add_updated_param/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/wpmu_admin_redirect_add_updated_param/#uses) | Source: [wp-includes/ms-deprecated.php:317](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-deprecated.php#L317-L327) * function[is_site_admin()](https://developer.wordpress.org/reference/functions/is_site_admin/) * Determine if user is a site admin. * Used by [0 functions](https://developer.wordpress.org/reference/functions/is_site_admin/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/is_site_admin/#uses) | Source: [wp-includes/ms-deprecated.php:64](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-deprecated.php#L64-L79) * function[get_dashboard_blog()](https://developer.wordpress.org/reference/functions/get_dashboard_blog/) * Get the “dashboard blog”, the blog where users without a blog edit their profile data. * Used by [0 functions](https://developer.wordpress.org/reference/functions/get_dashboard_blog/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/get_dashboard_blog/#uses) | Source: [wp-includes/ms-deprecated.php:26](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-deprecated.php#L26-L33) * hook[switch_blog](https://developer.wordpress.org/reference/hooks/switch_blog/) * Fires when the blog is switched. * Used by [2 functions](https://developer.wordpress.org/reference/hooks/switch_blog/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/switch_blog/#uses) | Source: [wp-includes/ms-blogs.php:527](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L527-L527) * function[restore_current_blog()](https://developer.wordpress.org/reference/functions/restore_current_blog/) * Restores the current blog, after calling switch_to_blog(). * Used by [36 functions](https://developer.wordpress.org/reference/functions/restore_current_blog/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/restore_current_blog/#uses) | Source: [wp-includes/ms-blogs.php:563](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L563-L596) * function[is_archived()](https://developer.wordpress.org/reference/functions/is_archived/) * Checks if a particular blog is archived. * Used by [0 functions](https://developer.wordpress.org/reference/functions/is_archived/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/is_archived/#uses) | Source: [wp-includes/ms-blogs.php:729](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L729-L731) * function[update_archived()](https://developer.wordpress.org/reference/functions/update_archived/) * Updates the ‘archived’ status of a particular blog. * Used by [0 functions](https://developer.wordpress.org/reference/functions/update_archived/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/update_archived/#uses) | Source: [wp-includes/ms-blogs.php:742](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L742-L745) * function[update_blog_status()](https://developer.wordpress.org/reference/functions/update_blog_status/) * Updates a blog details field. * Used by [3 functions](https://developer.wordpress.org/reference/functions/update_blog_status/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/update_blog_status/#uses) | Source: [wp-includes/ms-blogs.php:761](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L761-L786) * hook[update_blog_public](https://developer.wordpress.org/reference/hooks/update_blog_public/) * Fires after the current blog’s ‘public’ setting is updated. * Used by [1 function](https://developer.wordpress.org/reference/hooks/update_blog_public/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/update_blog_public/#uses) | Source: [wp-includes/ms-site.php:1277](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-site.php#L1277-L1277) * function[get_blog_status()](https://developer.wordpress.org/reference/functions/get_blog_status/) * Gets a blog details field. * Used by [1 function](https://developer.wordpress.org/reference/functions/get_blog_status/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/get_blog_status/#uses) | Source: [wp-includes/ms-blogs.php:799](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L799-L808) * function[get_last_updated()](https://developer.wordpress.org/reference/functions/get_last_updated/) * Gets a list of most recently updated blogs. * Used by [0 functions](https://developer.wordpress.org/reference/functions/get_last_updated/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/get_last_updated/#uses) | Source: [wp-includes/ms-blogs.php:823](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L823-L831) * function[switch_to_blog()](https://developer.wordpress.org/reference/functions/switch_to_blog/) * Switches the current blog. * Used by [37 functions](https://developer.wordpress.org/reference/functions/switch_to_blog/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/switch_to_blog/#uses) | Source: [wp-includes/ms-blogs.php:500](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L500-L546) * function[refresh_blog_details()](https://developer.wordpress.org/reference/functions/refresh_blog_details/) * Clears the blog details cache. * Used by [0 functions](https://developer.wordpress.org/reference/functions/refresh_blog_details/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/refresh_blog_details/#uses) | Source: [wp-includes/ms-blogs.php:287](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L287-L294) * function[update_blog_details()](https://developer.wordpress.org/reference/functions/update_blog_details/) * Updates the details for a blog and the blogs table for a given blog ID. * Used by [1 function](https://developer.wordpress.org/reference/functions/update_blog_details/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/update_blog_details/#uses) | Source: [wp-includes/ms-blogs.php:305](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L305-L321) * hook[make_spam_blog](https://developer.wordpress.org/reference/hooks/make_spam_blog/) * Fires when the ‘spam’ status is added to a site. * Used by [1 function](https://developer.wordpress.org/reference/hooks/make_spam_blog/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/make_spam_blog/#uses) | Source: [wp-includes/ms-site.php:1180](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-site.php#L1180-L1180) * hook[make_ham_blog](https://developer.wordpress.org/reference/hooks/make_ham_blog/) * Fires when the ‘spam’ status is removed from a site. * Used by [1 function](https://developer.wordpress.org/reference/hooks/make_ham_blog/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/make_ham_blog/#uses) | Source: [wp-includes/ms-site.php:1190](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-site.php#L1190-L1190) * hook[archive_blog](https://developer.wordpress.org/reference/hooks/archive_blog/) * Fires when the ‘archived’ status is added to a site. * Used by [1 function](https://developer.wordpress.org/reference/hooks/archive_blog/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/archive_blog/#uses) | Source: [wp-includes/ms-site.php:1228](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-site.php#L1228-L1228) * hook[unarchive_blog](https://developer.wordpress.org/reference/hooks/unarchive_blog/) * Fires when the ‘archived’ status is removed from a site. * Used by [1 function](https://developer.wordpress.org/reference/hooks/unarchive_blog/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/unarchive_blog/#uses) | Source: [wp-includes/ms-site.php:1238](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-site.php#L1238-L1238) * function[get_blog_option()](https://developer.wordpress.org/reference/functions/get_blog_option/) * Retrieves option value for a given blog id based on name of option. * Used by [6 functions](https://developer.wordpress.org/reference/functions/get_blog_option/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/get_blog_option/#uses) | Source: [wp-includes/ms-blogs.php:357](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L357-L383) * function[add_blog_option()](https://developer.wordpress.org/reference/functions/add_blog_option/) * Adds a new option for a given blog ID. * Used by [0 functions](https://developer.wordpress.org/reference/functions/add_blog_option/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/add_blog_option/#uses) | Source: [wp-includes/ms-blogs.php:404](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L404-L420) * function[delete_blog_option()](https://developer.wordpress.org/reference/functions/delete_blog_option/) * Removes an option by name for a given blog ID. Prevents removal of protected WordPress options. * Used by [0 functions](https://developer.wordpress.org/reference/functions/delete_blog_option/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/delete_blog_option/#uses) | Source: [wp-includes/ms-blogs.php:431](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L431-L447) * function[update_blog_option()](https://developer.wordpress.org/reference/functions/update_blog_option/) * Updates an option for a particular blog. * Used by [1 function](https://developer.wordpress.org/reference/functions/update_blog_option/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/update_blog_option/#uses) | Source: [wp-includes/ms-blogs.php:460](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ms-blogs.php#L460-L476) [Previous Page](https://developer.wordpress.org/reference/since/mu/page/4/?output_format=md) [1](https://developer.wordpress.org/reference/since/mu/?output_format=md) … [3](https://developer.wordpress.org/reference/since/mu/page/3/?output_format=md) [4](https://developer.wordpress.org/reference/since/mu/page/4/?output_format=md) 5 [6](https://developer.wordpress.org/reference/since/mu/page/6/?output_format=md) [Next Page](https://developer.wordpress.org/reference/since/mu/page/6/?output_format=md)