พอดีกำลังเริ่มหัดเขียน MVC PHP อยู่ครับ อยากจะขอคำปรึกษาหรือคำแนะนำหน่อยครับ เกี่ยวกับ Folder structure

<?php
    class Request{
        private $_controller;
        
        private $_method;
        
        private $_args;
        
        public function __construct() {
            
            $currenturl = str_replace('/admin','',$_SERVER['REQUEST_URI']);    
            
            $parts = explode('/',$currenturl);
            $parts = array_filter($parts);

            $this->_controller = ($c = array_shift($parts))? $c: 'index';
            $this->_method = ($c = array_shift($parts))? $c: 'index';
            $this->_args = (isset($parts[0])) ? $parts : array();

        }
        
        public function getController() {
            return $this->_controller;
        }
        public function getMethod() {
            return $this->_method;
        }
         public function getArgs() {
            return $this->_args;
        }       
    }

?>

<?php

class Router {
    
    public static function route(Request $request){
        
        $controller = $request->getController().'Controller';
        $method = $request->getMethod();
        $args = $request->getArgs();
        
        $controllerFile = DIR_APPLICATION.'controller/'.$request->getController().'.php';
            
        if(is_readable($controllerFile)){
            require_once $controllerFile;

            $controller = new $controller;
            $method = (is_callable(array($controller,$method))) ? $method : 'index';	
            
            if(!empty($args)){
                call_user_func_array(array($controller,$method),$args);
            }else{
                call_user_func(array($controller,$method));
            }
            return;
	}
        throw new Exception('404 - '.$request->getController().' not found');
    }
}
?>