Function: Update metadata of user.

Function: Escape single quotes, specialchar double quotes, and fix line endings.

Function: Escaping for HTML attributes.

Function: Register widget for sidebar with backward compatibility.

Function: Serves as an alias of wp_unregister_sidebar_widget().

Function: Registers widget control callback for customizing options.

Function: Retrieve the plural or single form based on the amount.

Function: Register plural strings in POT file, but don’t translate them.

Function: Retrieve all autoload options, or all options if no autoloaded ones exist.