common/modules/blog/Module.php

<?php
    
    namespace common\modules\blog;
    
    /**
     * blog module definition class
     */
    class Module extends \yii\base\Module
    {
        /**
         * @inheritdoc
         */
        public $controllerNamespace = 'common\modules\blog\controllers';
        
        /**
         * @inheritdoc
         */
        public function init()
        {
            parent::init();
            
            // custom initialization code goes here
        }
    }