Yii2 - How to set dynamic authTimeout in User Identity?

You can use event to set authTimeout before request will be handled:

'as beforeRequest' => [
    'class' => function (Event $event) {
        /* @var $app yiiwebApplication */
        $app = $event->sender;
        $app->getUser()->authTimeout = (new Query())
            ->select('value')
            ->from('{{%settings}}')
            ->where('name = :name', ['name' => 'authTimeout'])
            ->scalar($app->getDb());
    }
],

But probably more clear approach would be to create custom component and handle this in init().

class WebUser extends yiiwebUser {

    public function init() {
        parent::init();

        $this->authTimeout = (new Query())
            ->select('value')
            ->from('{{%settings}}')
            ->where('name = :name', ['name' => 'authTimeout'])
            ->scalar();
    }
}

Then use new component in your config:

'components' => [
    'user' => [
        'class' => WebUser::class,
        'identityClass' => appmodelsUserMaster::class,
        'enableAutoLogin' => false,
        'loginUrl' => ['/auth/login'],
    ],
    // ...
],

I hope this could help you

 public function actionIndex()
 {
    $searchModel = new ContribuenteSearch();
    $dataProvider = $searchModel->search(Yii::$app->request->queryParams);

    $dataProvider->pagination->pageSize=15;

    return $this->render('index', [
        'searchModel' => $searchModel,
        'dataProvider' => $dataProvider,
    ]);
 }

You can use it this way: http://www.yiiframework.com/extension/yii2-helpers/

Create a folder /common/helpers/, then create a helper class there and add your static methods.

namespace commonhelpers;

class DateHelper 
{
    public static function dt(){
        return date('Y-m-d H:i:s');
    }
}

Usage

use commonhelpersDateHelper;

echo DateHelper::dt();