Generates SQL for the WHERE clause based on passed search terms.

Generates SQL for the ORDER BY condition based on passed search terms.

Check if the terms are suitable for searching.

After looping through a nested query, this function restores the $post global to the current post in this query.

Returns an empty string.

Reset the page_on_front, show_on_front, and page_for_post settings when a linked page is deleted or trashed.

Formerly used internally to tidy up the search terms.

Gets the best available (and enabled) Auto-Update for WordPress core.

Retrieves the adjacent post link.

Gets the number of active sites on the installation.