Generic Skin for the WordPress Upgrader classes. This skin is designed to be extended for specific purposes.

Displays a form to the user to request for their FTP/SSH details in order to connect to the filesystem.

Registers a widget subclass.

Un-registers a widget subclass.

Prepares post data for return in an XML-RPC object.

Determines the best charset and collation to use given a charset and collation.

Determines if a database supports a particular feature.

Marks a deprecated action or filter hook as deprecated and throws a notice.

Loads plugin and theme textdomains just-in-time.

Adds any networks from the given IDs to the cache that do not already exist in cache.