do_action( 'core_upgrade_preamble' ) Fires after the core, plugin, and theme update tables. ContentsDescription Source Changelog User Contributed Notes Description #Description Source #Source File: wp-admin/update-core.php View on Trac Top ↑Changelog #Changelog Changelog Version Description 2.9.0 Introduced. Top ↑User Contributed Notes #User Contributed Notes You must log in before being able to contribute a note or feedback.