Denis

Order::find()->where('date > UNIX_TIMESTAMP(CURDATE())')
  ->andWhere(['OR',
              ['link' => $link],
              ['email' => $email]
  ])
  ->count();

return [
'components' => [
    'db1' => [
        'class' => 'yii\db\Connection',
        'dsn' => 'mysql:host=localhost;dbname=db1name', 
        'username' => 'db1username',
        'password' => 'db1password',
    ],
    'db2' => [
        'class' => 'yii\db\Connection',
        'dsn' => 'mysql:host=localhost;dbname=db2name', 
        'username' => 'db2username',
        'password' => 'db2password',
    ],
],
];

Yii::$app->db1->createCommand((new \yii\db\Query)->select('*')->from('tbl_name'))->queryAll();
Yii::$app->db2->createCommand((new \yii\db\Query)->select('*')->from('tbl_name'))->queryAll();

public static function getDb() {
    return Yii::$app->db2;
    // return Yii::$app->db1;
}

ob_start();

// Вызов вашего метода
 
// если необходимо сохраняем всё что есть в буфере в переменную
$content = ob_get_contents();
 
// отключаем и очищаем буфер
ob_end_clean();

$docs = Docs::find();
if($status_id==1 || $status_id==null) {
    $docs->where(['>=','status_id',-1]);
 }else {
    $docs->where(['status_id'=>$status_id]);
}
$data=$docs->andFilterWhere(['>=','bterm',$from1])
                    ->andFilterWhere(['<=','eterm',$to1])
                    ->all();

'assetManager' => [
    'bundles' => [
        'yii\web\JqueryAsset' => [
            'js'=>[]
        ],
    ],
],