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.

Function: Retrieve user metadata.

Function: Update metadata of user.

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

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

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