Function: Callback used to change %uXXXX to &#YYY; syntax

Function: Fixes JavaScript bugs in browsers.

Function: Checks that the taxonomy name exists.

Function: Check if Term exists.

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: Alias of wp_unregister_widget_control().

Function: Remove user meta data.