master/components/Request.php

<?php
    namespace artweb\artbox\components;
    
    class Request extends \yii\web\Request
    {
        
        public $web;
        
        public $adminUrl;
        
        public function getBaseUrl()
        {
            return str_replace($this->web, "", parent::getBaseUrl()) . $this->adminUrl;
        }
        
        public function resolvePathInfo()
        {
            if($this->getUrl() === $this->adminUrl) {
                return "";
            } else {
                return parent::resolvePathInfo();
            }
        }
    }