Handle_404::is_feed_404() – If there are no posts in a feed, make it 404 instead of sending an empty RSS feed.
Indexable_Head_Action::for_404() – Retrieves the head for the 404 page. Always sets the status to 404.
WPSEO_Handle_404::is_feed_404() – If there are no posts in a feed, make it 404 instead of sending an empty RSS feed.
WPSEO_Upgrade::upgrade_169() – Performs the 16.9 upgrade. shop_order indexables stopped being added in the db since 16.7, so we have to clean out older entries from the indexable table.
WPSEO_Upgrade::upgrade_170() – Performs the 17.0 upgrade. shop_order indexables were cleaned from the indexable table in 16.9, so we have to clean out the orphaned entries from the rest of the tables.
WPSEO_Upgrade::upgrade_171() – Performs the 17.1 upgrade. Removes the pipe and tilde separators and replaces them with the dash separator.
WPSEO_Upgrade::upgrade_172() – Performs the 17.2 upgrade. Cleans out any unnecessary indexables. See $cleanup_integration->get_cleanup_tasks() to see what will be cleaned out.
WPSEO_Upgrade::upgrade_21() – Detects if taxonomy terms were split and updates the corresponding taxonomy meta’s accordingly.
WPSEO_Upgrade::upgrade_44() – Moves the content-analysis-active and keyword-analysis-acive options from wpseo-titles to wpseo.
WPSEO_Upgrade::upgrade_47() – Renames the meta name for the cornerstone content. It was a public meta field and it has to be private.
WPSEO_Upgrade::upgrade_49() – Removes the ‘wpseo-dismiss-about’ notice for every user that still has it.
WPSEO_Upgrade::upgrade_50_51() – Updates the internal_link_count column to support improved functionality.
WPSEO_Upgrade::upgrade_61() – Updates the links for the link count when there is a difference between the site and home url.
WPSEO_Upgrade::upgrade_63() – Removes some no longer used options for noindexing subpages and for meta keywords and its associated templates.
WPSEO_Upgrade::upgrade_70() – Perform the 7.0 upgrade, moves settings around, deletes several options.
