pressbooks-aldine/app/controllers/Home.php

<?php

namespace App;

use Sober\Controller\Controller;

class Home extends Controller
{
    function sidebar_count() {
        $c = 0;
        foreach(['home-block-one', 'home-block-two', 'home-block-three', 'home-block-four', 'home-block-five'] as $block) {
            if (is_active_sidebar($block)) {
                $c++;
            }
        }
        return $c;
    }
}