Source

File: wp-includes/ms-blogs.php

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

	if ( null !== $deprecated ) {
		_deprecated_argument( __FUNCTION__, '3.1.0' );
	}

	$allowed_field_names = array( 'site_id', 'domain', 'path', 'registered', 'last_updated', 'public', 'archived', 'mature', 'spam', 'deleted', 'lang_id' );

	if ( ! in_array( $pref, $allowed_field_names, true ) ) {
		return $value;
	}

	$result = wp_update_site(
		$blog_id,
		array(
			$pref => $value,
		)
	);

	if ( is_wp_error( $result ) ) {
		return false;
	}

	return $value;
}