create_empty_blog

function create_empty_blog( $domain, $path, $weblog_title, $site_id = 1 ) {
	_deprecated_function( __FUNCTION__, '4.4.0' );

	if ( empty($path) )
		$path = '/';

	// Check if the domain has been used already. We should return an error message.
	if ( domain_exists($domain, $path, $site_id) )
		return __( '<strong>Error</strong>: Site URL you&#8217;ve entered is already taken.' );

	/*
	 * Need to back up wpdb table names, and create a new wp_blogs entry for new blog.
	 * Need to get blog_id from wp_blogs, and create new table names.
	 * Must restore table names at the end of function.
	 */

	if ( ! $blog_id = insert_blog($domain, $path, $site_id) )
		return __( '<strong>Error</strong>: There was a problem creating site entry.' );

	switch_to_blog($blog_id);
	install_blog($blog_id);
	restore_current_blog();

	return $blog_id;
}