* Deprecated functions from WordPress MU and the multisite feature. You shouldn't
* use these functions and look for the alternatives instead. The functions will be
* removed in a later version.
* Deprecated functions come here to die.
* Get the "dashboard blog", the blog where users without a blog edit their profile data.
* Dashboard blog functionality was removed in WordPress 3.1, replaced by the user admin.
* @deprecated 3.1.0 Use get_site()
* @return WP_Site Current site object.
function get_dashboard_blog() {
_deprecated_function( __FUNCTION__, '3.1.0', 'get_site()' );
if ( $blog = get_site_option( 'dashboard_blog' ) ) {
return get_site( $blog );
return get_site( get_network()->site_id );
* Generates a random password.
* @deprecated 3.0.0 Use wp_generate_password()
* @see wp_generate_password()
* @param int $len Optional. The length of password to generate. Default 8.
function generate_random_password( $len = 8 ) {
_deprecated_function( __FUNCTION__, '3.0.0', 'wp_generate_password()' );
return wp_generate_password( $len );
* Determine if user is a site admin.
* Plugins should use is_multisite() instead of checking if this function exists
* to determine if multisite is enabled.
* This function must reside in a file included only if is_multisite() due to
* legacy function_exists() checks to determine if multisite is enabled.
* @deprecated 3.0.0 Use is_super_admin()
* @param string $user_login Optional. Username for the user to check. Default empty.
function is_site_admin( $user_login = '' ) {
_deprecated_function( __FUNCTION__, '3.0.0', 'is_super_admin()' );
if ( empty( $user_login ) ) {
$user_id = get_current_user_id();
$user = get_user_by( 'login', $user_login );
return is_super_admin( $user_id );
if ( !function_exists( 'graceful_fail' ) ) :
* Deprecated functionality to gracefully fail.
* @deprecated 3.0.0 Use wp_die()
function graceful_fail( $message ) {
_deprecated_function( __FUNCTION__, '3.0.0', 'wp_die()' );
$message = apply_filters( 'graceful_fail', $message );
$message_template = apply_filters( 'graceful_fail_template',
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
line-height: 1.6em; font-family: Georgia, serif; width: 390px; margin: auto;
<p class="message">%s</p>
die( sprintf( $message_template, $message ) );
* Deprecated functionality to retrieve user information.
* @deprecated 3.0.0 Use get_user_by()
* @param string $username Username.
function get_user_details( $username ) {
_deprecated_function( __FUNCTION__, '3.0.0', 'get_user_by()' );
return get_user_by('login', $username);
* Deprecated functionality to clear the global post cache.
* @deprecated 3.0.0 Use clean_post_cache()
* @see clean_post_cache()
* @param int $post_id Post ID.
function clear_global_post_cache( $post_id ) {
_deprecated_function( __FUNCTION__, '3.0.0', 'clean_post_cache()' );
* Deprecated functionality to determin if the current site is the main site.
* @deprecated 3.0.0 Use is_main_site()
function is_main_blog() {
_deprecated_function( __FUNCTION__, '3.0.0', 'is_main_site()' );
* Deprecated functionality to validate an email address.
* @deprecated 3.0.0 Use is_email()
* @param string $email Email address to verify.
* @param bool $check_domain Deprecated.
* @return string|false Valid email address on success, false on failure.
function validate_email( $email, $check_domain = true) {
_deprecated_function( __FUNCTION__, '3.0.0', 'is_email()' );
return is_email( $email, $check_domain );
* Deprecated functionality to retrieve a list of all sites.
* @deprecated 3.0.0 Use wp_get_sites()
* @param int $start Optional. Offset for retrieving the blog list. Default 0.
* @param int $num Optional. Number of blogs to list. Default 10.
* @param string $deprecated Unused.
function get_blog_list( $start = 0, $num = 10, $deprecated = '' ) {
_deprecated_function( __FUNCTION__, '3.0.0', 'wp_get_sites()' );
$blogs = $wpdb->get_results( $wpdb->prepare( "SELECT blog_id, domain, path FROM $wpdb->blogs WHERE site_id = %d AND public = '1' AND archived = '0' AND mature = '0' AND spam = '0' AND deleted = '0' ORDER BY registered DESC", get_current_network_id() ), ARRAY_A );
foreach ( (array) $blogs as $details ) {
$blog_list[ $details['blog_id'] ] = $details;
$blog_list[ $details['blog_id'] ]['postcount'] = $wpdb->get_var( "SELECT COUNT(ID) FROM " . $wpdb->get_blog_prefix( $details['blog_id'] ). "posts WHERE post_status='publish' AND post_type='post'" );
return array_slice( $blog_list, $start, count( $blog_list ) );
return array_slice( $blog_list, $start, $num );
* Deprecated functionality to retrieve a list of the most active sites.
* @param int $num Optional. Number of activate blogs to retrieve. Default 10.
* @param bool $display Optional. Whether or not to display the most active blogs list. Default true.
* @return array List of "most active" sites.
function get_most_active_blogs( $num = 10, $display = true ) {
_deprecated_function( __FUNCTION__, '3.0.0' );
$blogs = get_blog_list( 0, 'all', false ); // $blog_id -> $details
if ( is_array( $blogs ) ) {
foreach ( (array) $blogs as $key => $details ) {
$most_active[ $details['blog_id'] ] = $details['postcount'];
$blog_list[ $details['blog_id'] ] = $details; // array_slice() removes keys!
foreach ( (array) $most_active as $key => $details ) {
$t[ $key ] = $blog_list[ $key ];
if ( is_array( $most_active ) ) {
foreach ( (array) $most_active as $key => $details ) {
$url = esc_url('http://' . $details['domain'] . $details['path']);
echo '<li>' . $details['postcount'] . " <a href='$url'>$url</a></li>";
return array_slice( $most_active, 0, $num );
* Redirect a user based on $_GET or $_POST arguments.
* The function looks for redirect arguments in the following order:
* 3) $_SERVER['HTTP_REFERER']
* @deprecated 3.3.0 Use wp_redirect()
* @param string $url Optional. Redirect URL. Default empty.
function wpmu_admin_do_redirect( $url = '' ) {
_deprecated_function( __FUNCTION__, '3.3.0', 'wp_redirect()' );
if ( isset( $_GET['ref'] ) && isset( $_POST['ref'] ) && $_GET['ref'] !== $_POST['ref'] ) {
wp_die( __( 'A variable mismatch has been detected.' ), __( 'Sorry, you are not allowed to view this item.' ), 400 );
} elseif ( isset( $_POST['ref'] ) ) {
} elseif ( isset( $_GET['ref'] ) ) {
$ref = wpmu_admin_redirect_add_updated_param( $ref );
if ( ! empty( $_SERVER['HTTP_REFERER'] ) ) {
wp_redirect( $_SERVER['HTTP_REFERER'] );
$url = wpmu_admin_redirect_add_updated_param( $url );
if ( isset( $_GET['redirect'] ) && isset( $_POST['redirect'] ) && $_GET['redirect'] !== $_POST['redirect'] ) {
wp_die( __( 'A variable mismatch has been detected.' ), __( 'Sorry, you are not allowed to view this item.' ), 400 );
} elseif ( isset( $_GET['redirect'] ) ) {
if ( 's_' === substr( $_GET['redirect'], 0, 2 ) )
$url .= '&action=blogs&s='. esc_html( substr( $_GET['redirect'], 2 ) );
} elseif ( isset( $_POST['redirect'] ) ) {
$url = wpmu_admin_redirect_add_updated_param( $_POST['redirect'] );
* Adds an 'updated=true' argument to a URL.
* @deprecated 3.3.0 Use add_query_arg()
* @param string $url Optional. Redirect URL. Default empty.
function wpmu_admin_redirect_add_updated_param( $url = '' ) {
_deprecated_function( __FUNCTION__, '3.3.0', 'add_query_arg()' );
if ( strpos( $url, 'updated=true' ) === false ) {
if ( strpos( $url, '?' ) === false )
return $url . '?updated=true';
return $url . '&updated=true';
* Get a numeric user ID from either an email address or a login.
* A numeric string is considered to be an existing user ID
* and is simply returned as such.
* @deprecated 3.6.0 Use get_user_by()
* @param string $string Either an email address or a login.
function get_user_id_from_string( $string ) {
_deprecated_function( __FUNCTION__, '3.6.0', 'get_user_by()' );
if ( is_email( $string ) )
$user = get_user_by( 'email', $string );
elseif ( is_numeric( $string ) )
$user = get_user_by( 'login', $string );
* Get a full blog URL, given a domain and a path.
function get_blogaddress_by_domain( $domain, $path ) {
_deprecated_function( __FUNCTION__, '3.7.0' );
if ( is_subdomain_install() ) {
$url = "http://" . $domain.$path;
if ( $domain != $_SERVER['HTTP_HOST'] ) {
$blogname = substr( $domain, 0, strpos( $domain, '.' ) );
$url = 'http://' . substr( $domain, strpos( $domain, '.' ) + 1 ) . $path;
// We're not installing the main blog.
if ( 'www.' !== $blogname )
$url = 'http://' . $domain . $path;
return esc_url_raw( $url );
* @param string $domain The new blog's domain.
* @param string $path The new blog's path.
* @param string $weblog_title The new blog's title.
* @param int $site_id Optional. Defaults to 1.
* @return string|int The ID of the newly created blog
function create_empty_blog( $domain, $path, $weblog_title, $site_id = 1 ) {
_deprecated_function( __FUNCTION__, '4.4.0' );
// Check if the domain has been used already. We should return an error message.
if ( domain_exists($domain, $path, $site_id) )
return __( '<strong>Error</strong>: Site URL you’ve entered is already taken.' );
* Need to back up wpdb table names, and create a new wp_blogs entry for new blog.
* Need to get blog_id from wp_blogs, and create new table names.
* Must restore table names at the end of function.
if ( ! $blog_id = insert_blog($domain, $path, $site_id) )
return __( '<strong>Error</strong>: There was a problem creating site entry.' );
switch_to_blog($blog_id);
* Get the admin for a domain/path combination.
* @global wpdb $wpdb WordPress database abstraction object.
* @param string $domain Optional. Network domain.
* @param string $path Optional. Network path.
* @return array|false The network admins.
function get_admin_users_for_domain( $domain = '', $path = '' ) {
_deprecated_function( __FUNCTION__, '4.4.0' );
$network_id = get_current_network_id();
$_networks = get_networks( array(
$network_id = ! empty( $_networks ) ? array_shift( $_networks ) : 0;
return $wpdb->get_results( $wpdb->prepare( "SELECT u.ID, u.user_login, u.user_pass FROM $wpdb->users AS u, $wpdb->sitemeta AS sm WHERE sm.meta_key = 'admin_user_id' AND u.ID = sm.meta_value AND sm.site_id = %d", $network_id ), ARRAY_A );
* Return an array of sites for a network or networks.
* @deprecated 4.6.0 Use get_sites()
* Array of default arguments. Optional.
* @type int|int[] $network_id A network ID or array of network IDs. Set to null to retrieve sites
* from all networks. Defaults to current network ID.
* @type int $public Retrieve public or non-public sites. Default null, for any.
* @type int $archived Retrieve archived or non-archived sites. Default null, for any.
* @type int $mature Retrieve mature or non-mature sites. Default null, for any.
* @type int $spam Retrieve spam or non-spam sites. Default null, for any.
* @type int $deleted Retrieve deleted or non-deleted sites. Default null, for any.
* @type int $limit Number of sites to limit the query to. Default 100.
* @type int $offset Exclude the first x sites. Used in combination with the $limit parameter. Default 0.
* @return array[] An empty array if the installation is considered "large" via wp_is_large_network(). Otherwise,
* an associative array of WP_Site data as arrays.
function wp_get_sites( $args = array() ) {
_deprecated_function( __FUNCTION__, '4.6.0', 'get_sites()' );
if ( wp_is_large_network() )
'network_id' => get_current_network_id(),
$args = wp_parse_args( $args, $defaults );
// Backward compatibility.
if( is_array( $args['network_id'] ) ){