wp-includes/ms-blogs.php:745Updates the 'archived' status of a particular blog.
$idint$archivedstringstringfunction update_archived( $id, $archived ) { update_blog_status( $id, 'archived', $archived ); return $archived;}Introduced in MU (3.0.0). Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/ms-blogs.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.