frontend/views/layouts/main.php
<?php
/* @var $this \yii\web\View */
use yii\helpers\ArrayHelper;
use yii\widgets\Breadcrumbs;
/* @var $content string */
$this->beginContent('@frontend/views/layouts/base.php')
?>
<div class="container">
<?= Breadcrumbs::widget([
'links' => isset($this->params['breadcrumbs']) ? $this->params['breadcrumbs'] : [],
]) ?>
<?php if (Yii::$app->session->hasFlash('alert')):?>
<?= \yii\bootstrap\Alert::widget([
'body'=>ArrayHelper::getValue(Yii::$app->session->getFlash('alert'), 'body'),
'options'=>ArrayHelper::getValue(Yii::$app->session->getFlash('alert'), 'options'),
])?>
<?php endif; ?>
<!-- Example of your ads placing -->
<?= \common\widgets\DbText::widget([
'key' => 'ads-example'
]) ?>
<?= $content ?>
</div>
<?php $this->endContent() ?>