在PHP5.3之后, 打开yaf.use_namespace的情况下, 也可以使用 Yaf\Config_Simple？

[xiuchanghu]

我yaf配置如下
[yaf]
extension=yaf.so
yaf.cache_config=1
yaf.use_namespace=1
根据文档看到
在PHP5.3之后, 打开yaf.use_namespace的情况下, 也可以使用 Yaf\Config_Simple
可是使用时报错
`<?php

use Yaf\Application;
use Yaf\Config_Simple;

/**

• 对应用配置的封装，方便读取

• Config::get('config')
  */
  class Config
  {
  private static $_config = null;
  public static function get($key = null, $default = null)
  {
  if ($value = self::getConfig()->get($key)) {
  return is_object($value) ? $value->toArray() : $value;
  } else {
  return $default;
  }
  }

  public static function set($key, $value)
  {
  return self::getConfig()->set($key, $value);
  }

  public static function getSecret($name = '', $key = null)
  {
  if ($path = self::getConfig()->get('secret_config_path')) {
  $secretConfig = new Yaf_Config_Ini($path, $name);
  return $key ? $secretConfig->get($key) : $secretConfig->toArray();
  }
  }

  /获取配置/
  private static function getConfig()
  {
  if (null === self::$_config) {
  $config = Application::app()->getConfig()->toArray();
  self::$_config = new Config_Simple($config, false);
  }
  return self::$_config;
  }
  }
  `

Warning: Yaf\Loader::autoload(): You should not use 'Yaf_' as class name prefix in /app/data/application/library/Config.php on line 67
Warning: Yaf\Loader::autoload(): Failed opening script /app/data/application/library/Yaf/Config/Simple.php: No such file or directory in /app/data/application/library/Config.php on line 67

Fatal error: Uncaught Error: Class 'Yaf\Config_Simple' not found in /app/data/application/library/Config.php:67 Stack trace: #0 /app/data/application/library/Config.php(24): Config::getConfig() #1 /app/data/application/library/Log.php(37): Config::get('log.dir') #2 /app/data/application/library/Log.php(20): Log::getStream('INFO') #3 /app/data/application/controllers/Index.php(28): Log::write('log\xE6\xB5\x8B\xE8\xAF\x95', 'INFO') #4 [internal function]: IndexController->indexAction() #5 /app/data/index.php(7): Yaf\Application->run() #6 {main} thrown in /app/data/application/library/Config.php on line 67

[lovelock]

完全看不懂这些代码。你是不是改完没有重启php-fpm？