Is it possible to set up Last-Modified in yii2?

Question

Yii

Welcome all. Can you please tell me how to set lastmod headers in yii2?
Will it be necessary to run through the database, tracking changes in all records that are displayed on the page and look at the date the file structure of the views was changed (including nested ones)? Or is there some other solution?

Answer 1

The documentation even has an example from a controller:

public function behaviors()
{
    return [
        [
            'class' => 'yii\filters\HttpCache',
            'only' => ['index'],
            'lastModified' => function ($action, $params) {
                $q = new \yii\db\Query();
                return $q->from('post')->max('updated_at');
            },
        ],
    ];
}