is_upload_space_available() – Determines if there is any upload space left in the current blog’s quota.
Language_Pack_Upgrader::async_upgrade() – Asynchronously upgrades language packs after other upgrades have been made.
Language_Pack_Upgrader::check_package() – Check the package source to make sure there are .mo and .po files.
Language_Pack_Upgrader::clear_destination() – Clears existing translations where this item is going to be installed into.
maybe_convert_table_to_utf8mb4() – If a table only contains utf8 or utf8mb4 columns, convert it to utf8mb4.
media_handle_upload() – Save a file submitted from a POST request and create an attachment post for it.
menu_page_url() – Get the URL to access a particular menu page based on the slug it was registered with.
new_user_email_admin_notice() – Adds an admin notice alerting the user to check for confirmation request email after email address change.
option_update_filter() – Refreshes the value of the allowed options list available via the ‘allowed_options’ hook.