Yii2 cannot find the class even though it exists. What to do?

Question

Yii

In the file frontend/views/layouts/main.php I write: Created a folder in the root components\MenuWidget.php Created a class:
<?php echo \app\components\MenuWidget::widget() ?>

<?php

namespace app\components;

use yii\base\Widget;
use common\models\Category;
use Yii;

class MenuWidget extends Widget
{

}

And further produces an error that such class is not found at all.

Error: Class 'app\components\MenuWidget' not found in D:\OpenServer\domains\site.name\frontend\views\layouts\main.php:132

In line 132, the code is written, which is on top
. What is the problem? what am I doing wrong?

Answer 1

Place components directory in frontend
Namespace in widget file will be In main.php file it will be like this:

use frontend\components\MenuWidget;
........
echo MenuWidget::widget();

This is if you want to use the widget for the frontend only.
If you need to use it for the backend as well, then put the widget in common.