PHP中的名称空间

请看这个，告诉我你对此有何看法：

1） 我有这样的结构： 2）和代码： 它是Index.php，它的作品：

<?php
        namespace Classes; 
       // ^ It doesn't work but when I replace "Classes" to "Test\Classes" It 
           works!
        // But why?
      Class Someclass
       {
         use Traits/Sometrait;
          //Yeah, It doesn't work too and when I replace "traits" to "Test\Traits" It  works!
         // Why? =(
          public static function start() {...}
      }
      ?>

**

它是Someclass.php:

<?php
        namespace Classes; 
       // ^ It doesn't work but when I replace "Classes" to "Test\Classes" It 
           works!
        // But why?
      Class Someclass
       {
         use Traits/Sometrait;
          //Yeah, It doesn't work too and when I replace "traits" to "Test\Traits" It  works!
         // Why? =(
          public static function start() {...}
      }
      ?>

---

您遗漏了最重要的部分。。
里面有什么

spl_autoload_register(...);

?

这里设置的函数将决定如何在项目目录中找到类

看看这个

spl_autoload_register(...);