PHP Autoloader添加命名空间路径

我的MVC结构如下：

- web
  -- Classes
    --- Loader.php
  -- Core
    --- Controller.php
    --- Model.php
    --- View.php
    --- Bootstrap.php
    --- DB.php
  -- Project
    --- Controllers (folder)
    --- Models (folder)
    --- Views (folder)

现在，我为每个名称空间指定了名称空间。例如，我有

    namespace Classes; //for Loader.php
    namespace Core; //For Controller.php, Model.php etc...
    namespace Project'Controllers; //For Controllers inside Controllers folder etc...

我的自动加载器看起来像这样：

public static function Autoloader2($className) {
    $className = explode('''', $className);
    $class = array_pop($className);
    $namespace = implode(DIRECTORY_SEPARATOR, $className);
    $file = $namespace . DIRECTORY_SEPARATOR . str_replace('_', DIRECTORY_SEPARATOR, $class) . '.php';
   require $file;
}

My main index.php使用

    spl_autoload_register( array('Loader', 'Autoloader2') );
    $app = new Core'Bootstrap();

当我打开localhost/web时/我得到以下错误：

  Warning: require(Core/Project/Controllers/Index.php): failed to open stream: N

它似乎为请求的文件准备了Core/。Index.php位于Project/Controllers内部，而不是核心/Project/Controller。如果我试图删除

  //namespace Core; from Bootstrap.php i get the following error
  Fatal error: Class 'Core'Bootstrap' not found 

请帮助