add useful usage data to the base JSON of the WordPress site

more-json-info.php

/*---------------------------------JSON MOD FOR ADDITIONAL SITE INFO----------------------------------*/

function extraJsonData($response){
    $blog_id = get_current_blog_id();
    $blog_details = get_blog_details($blog_id);
    $data = $response->data;
    $data['created'] =$blog_details->registered;
    $data['last_updated'] =$blog_details->last_updated;
    $data['post_count'] =$blog_details->post_count;
    $data['page_count'] = wp_count_posts('page','publish');
    $response->set_data($data);
    return $response;
}