sanitize_mime_type() Sanitizes a mime type
sanitize_trackback_urls() Sanitizes space or carriage return separated URLs that are used to send trackbacks.
wp_slash() Adds slashes to a string or recursively adds slashes to strings within an array.
wp_unslash() Removes slashes from a string or recursively removes slashes from strings within an array.
get_url_in_content() Extracts and returns the first URL from passed content.
wp_spaces_regexp() Returns the regexp for common whitespace characters.
wp_enqueue_emoji_styles() Enqueues the important emoji-related styles.
print_emoji_detection_script() Prints the inline Emoji detection script if it is not already printed.
_print_emoji_detection_script() Prints inline Emoji detection script.
wp_encode_emoji() Converts emoji characters to their equivalent HTML entity.
wp_staticize_emoji() Converts emoji to a static img element.
wp_staticize_emoji_for_email() Converts emoji in emails into static images.
_wp_emoji_list() Returns arrays of emoji data.
url_shorten() Shortens a URL, to be used as link text.
sanitize_hex_color() Sanitizes a hex color.
sanitize_hex_color_no_hash() Sanitizes a hex color without a hash. Use sanitize_hex_color() when possible.
maybe_hash_hex_color() Ensures that any hex color is properly hashed.
get_sitestats() Gets the network's site and user counts.
get_active_blog_for_user() Gets one of a user's active blogs.
get_blog_count() Gets the number of active sites on the installation.
get_blog_post() Gets a blog post from any site on the network.
add_user_to_blog() Adds a user to a blog, along with specifying the user's role.
remove_user_from_blog() Removes a user from a blog.
get_blog_permalink() Gets the permalink for a post on another blog.
get_blog_id_from_url() Gets a blog's numeric ID from its URL.
is_email_address_unsafe() Checks an email address against a list of banned domains.
wpmu_validate_user_signup() Sanitizes and validates data required for a user sign-up.
wpmu_validate_blog_signup() Processes new site registrations.
wpmu_signup_blog() Records site signup information for future activation.
wpmu_signup_user() Records user signup information for future activation.
wpmu_signup_blog_notification() Sends a confirmation request email to a user when they sign up for a new site. The new site will not become active
wpmu_signup_user_notification() Sends a confirmation request email to a user when they sign up for a new user account (without signing up for a site
wpmu_activate_signup() Activates a signup.
wp_delete_signup_on_user_delete() Deletes an associated signup entry when a user is deleted from the database.
wpmu_create_user() Creates a user.
wpmu_create_blog() Creates a site.
newblog_notify_siteadmin() Notifies the network admin that a new site has been activated.
newuser_notify_siteadmin() Notifies the network admin that a new user has been activated.
domain_exists() Checks whether a site name is already taken.
wpmu_welcome_notification() Notifies the site administrator that their site activation was successful.
wpmu_new_site_admin_notification() Notifies the Multisite network administrator that a new site was created.
wpmu_welcome_user_notification() Notifies a user that their account activation has been successful.
get_current_site() Gets the current network.
get_most_recent_post_of_user() Gets a user's most recent post.
check_upload_mimes() Checks an array of MIME types against a list of allowed types.
update_posts_count() Updates a blog's post count.
wpmu_log_new_registrations() Logs the user email, IP, and registration date of a new site.
redirect_this_site() Ensures that the current site's domain is listed in the allowed redirect host list.
upload_is_file_too_big() Checks whether an upload is too big.
signup_nonce_fields() Adds a nonce field to the signup page.