Souke/common/config/bootstrap.php

<?php
Yii::setAlias('common', dirname(__DIR__));
Yii::setAlias('frontend', dirname(dirname(__DIR__)) . '/frontend');
Yii::setAlias('backend', dirname(dirname(__DIR__)) . '/backend');
Yii::setAlias('console', dirname(dirname(__DIR__)) . '/console');
Yii::setAlias('producer', dirname(dirname(__DIR__)) . '/producer');

$server_name = $_SERVER['SERVER_NAME'] ;
Yii::setAlias('@domainName', (YII_ENV === 'dev') ? (($server_name == 'localhost') ? 'localhost' : 'laboiteapain-dev.net') : 'laboiteapain.net');
Yii::setAlias('@baseUrl', ($server_name == 'localhost') ? '/laboiteapain/' : '/');
Yii::setAlias('@baseUrlFrontend', (($server_name == 'localhost') ? '/frontend/web' : ''));
Yii::setAlias('@baseUrlBackend', (($server_name == 'localhost') ? '/backend/web' : ''));
Yii::setAlias('@baseUrlProducer', (($server_name == 'localhost') ? '/producer/web' : ''));
Yii::setAlias('@frontendSubdomain', (($server_name == 'localhost') ? '' : 'www'));
Yii::setAlias('@backendSubdomain', (($server_name == 'localhost') ? '' : 'admin'));
Yii::setAlias('@producerSubdomain', (($server_name == 'localhost') ? '' : 'producteurs'));

/*
 * Autoload 
 */

Yii::$classMap['Import'] = Yii::getAlias('@common/exts/Import.php'); // sesuaikan pathnya

// yii
Import::using('Yii');
Import::using('yii\filters\*');
Import::using('yii\data\*');
Import::using('yii\db\*');
Import::using('yii\behaviors\*');
Import::using('yii\helpers\*');
Import::using('yii\web\NotFoundHttpException');
Import::using('yii\grid\*');

// models
Import::using('common\models\*');
Import::using('frontend\models\*');
Import::using('backend\models\*');

// controllers
Import::using('common\controllers\*');
Import::using('frontend\controllers\*');
Import::using('backend\controllers\*');
Import::using('producer\controllers\*');

// helpers
Import::using('common\helpers\*');

// components
Import::using('common\components\*');
Import::using('producer\components\*');
Import::using('backend\components\*');
Import::using('frontend\components\*');

// pdf
Import::using('kartik\mpdf\Pdf');