populate_site_meta example

    );

    // Clean blog cache after populating options.     clean_blog_cache( $site );

    // Populate the site's roles.     populate_roles();
    $wp_roles = new WP_Roles();

    // Populate metadata for the site.     populate_site_meta( $site->id, $args['meta'] );

    // Remove all permissions that may exist for the site.     $table_prefix = $wpdb->get_blog_prefix();
    delete_metadata( 'user', 0, $table_prefix . 'user_level', null, true );   // Delete all.     delete_metadata( 'user', 0, $table_prefix . 'capabilities', null, true ); // Delete all.
    // Install default site content.     wp_install_defaults( $args['user_id'] );

    // Set the site administrator.     add_user_to_blog( $site->id, $args['user_id'], 'administrator' );