update_blog_status( int $blog_id, string $pref, string $value, null $deprecated = null )

function update_blog_status( $blog_id, $pref, $value, $deprecated = null ) {
	global $wpdb;

	if ( null !== $deprecated  )
		_deprecated_argument( __FUNCTION__, 'WP-3.1.0' );

	if ( ! in_array( $pref, array( 'site_id', 'domain', 'path', 'registered', 'last_updated', 'public', 'archived', 'mature', 'spam', 'deleted', 'lang_id') ) )
		return $value;

	$result = $wpdb->update( $wpdb->blogs, array($pref => $value, 'last_updated' => current_time('mysql', true)), array('blog_id' => $blog_id) );

	if ( false === $result )
		return false;

	clean_blog_cache( $blog_id );

	if ( 'spam' == $pref ) {
		if ( $value == 1 ) {
			/** This filter is documented in wp-includes/ms-blogs.php */
			do_action( 'make_spam_blog', $blog_id );
		} else {
			/** This filter is documented in wp-includes/ms-blogs.php */
			do_action( 'make_ham_blog', $blog_id );
		}
	} elseif ( 'mature' == $pref ) {
		if ( $value == 1 ) {
			/** This filter is documented in wp-includes/ms-blogs.php */
			do_action( 'mature_blog', $blog_id );
		} else {
			/** This filter is documented in wp-includes/ms-blogs.php */
			do_action( 'unmature_blog', $blog_id );
		}
	} elseif ( 'archived' == $pref ) {
		if ( $value == 1 ) {
			/** This filter is documented in wp-includes/ms-blogs.php */
			do_action( 'archive_blog', $blog_id );
		} else {
			/** This filter is documented in wp-includes/ms-blogs.php */
			do_action( 'unarchive_blog', $blog_id );
		}
	} elseif ( 'deleted' == $pref ) {
		if ( $value == 1 ) {
			/** This filter is documented in wp-includes/ms-blogs.php */
			do_action( 'make_delete_blog', $blog_id );
		} else {
			/** This filter is documented in wp-includes/ms-blogs.php */
			do_action( 'make_undelete_blog', $blog_id );
		}
	} elseif ( 'public' == $pref ) {
		/**
		 * Fires after the current blog's 'public' setting is updated.
		 *
		 * @since WP-MU (3.0.0)
		 *
		 * @param int    $blog_id Blog ID.
		 * @param string $value   The value of blog status.
 		 */
		do_action( 'update_blog_public', $blog_id, $value ); // Moved here from update_blog_public().
	}

	return $value;
}