自动加载类的学习

    spl_autoload_register('auto1');

    spl_autoload_register('auto2');

    function auto1($className){

      $file = "./21".$className.".class.php";

      if(file_exists($file)){

        require "./21".$className.".class.php";

      }

    }

    function auto1($className){

      $file = "./22".$className.".class.php";

      if(file_exists($file)){

        require "./22".$className.".class.php";

      }

    }

自动加载类