controllers/SettingsController.php
public function actionProfile()
    {
        $model = $this->finder->findProfileById(\Yii::$app->user->identity->getId());

        $this->performAjaxValidation($model);

        if ($model->load(\Yii::$app->request->post()) && $model->save()) {
            \Yii::$app->getSession()->setFlash('success', \Yii::t('user', 'Your profile has been updated'));
            return $this->refresh();
        }

        return $this->render('profile', [
            'model' => $model,
        ]);
    }
public function actionProfile()
    {
        $model = $this->finder->findProfileById(\Yii::$app->user->identity->getId());

        $this->performAjaxValidation($model);

        if ($model->load(\Yii::$app->request->post()) && $model->save()) {
            \Yii::$app->getSession()->setFlash('success', \Yii::t('user', 'Your profile has been updated'));
            return $this->refresh();
        }

        return $this->render('profile', [
            'model' => $model,
        ]);
    }
Shows profile settings form.
@return string|\yii\web\Response