Determines whether core should be updated.

Check the last time plugins were run before checking plugin versions.

Check themes versions only after a duration of time.

Clear existing update caches for plugins, themes, and core.

Retrieves a list of all language updates available.

Collect counts and UI strings for available updates

Performs WordPress automatic background updates.

Schedule core, theme, and plugin update checks.

Checks for available updates to plugins based on the latest versions hosted on WordPress.org.

Checks for available updates to themes based on the latest versions hosted on WordPress.org.