Show the site_name on sites.php with multisite wordpress

multisite.php

<?php

/* Add site_name as a column */
add_filter( 'wpmu_blogs_columns', 'add_useful_columns' );
function add_useful_columns( $site_columns ) {
    $site_columns['site_name'] = 'Site Name';
    return $site_columns;
}

/* Populate site_name with blogs site_name */
add_action( 'manage_sites_custom_column', 'column_site_name' , 10, 2 );
function column_site_name( $column_name, $blog_id ) {
    $current_blog_details = get_blog_details( array( 'blog_id' => $blog_id ) );
    echo ucwords( $current_blog_details->blogname );
}