how to load custom classes using slim middleware in slim framework from a folder to routes

Question

below is my example routes i have a custom class called Category but am getting error like this Class 'app\\Category' not found

 $app->get('/category',function($request, $response, $args){
        $categories = new app\Category();
        $categories->getCategories();

    });

how to load this class in order to make use of it in slim framework V3

Answer 1

通过在 composer.json 中添加 autoload 块，通过 composer autoloader 加载它