如何读取大XML数据并在PHP中缓存它

问题描述：

I am doing a PHP app and I need to read several xml files containing text and I want show it to the user. This is working without any problems.

The information stored in those files could be cached for a long time as it does not change too often. However, those files tend to be kind of heavy so it could be a bad idea to load them at every request. i'm trying to find a way to load the data in a lazy way maybe by using a singleton and store them somewhere. Si, I still have the following questions:

where to store de data? as session parameters?
how to do the lazy loading? using singleton? is that even a good idea in php?

Thanks a lot

我正在做一个PHP应用程序，我需要阅读几个包含文本的xml文件，我想将它显示给用户。这没有任何问题。 p>

存储在这些文件中的信息可能会被缓存很长时间，因为它不会经常更改。但是，这些文件往往有点沉重，因此在每次请求时加载它们都是一个坏主意。我试图找到一种以懒惰的方式加载数据的方法，可能是通过使用单例并将它们存储在某处。 Si，我还有以下问题： p>

存储数据的位置？作为会话参数？ li>
如何进行延迟加载？使用单身人士？这在php中是个好主意吗？ li> ul>
非常感谢 p> div>

答

Do not use session parameters. These are typically stored in a text file which is parsed every time you call session_start(). You should avoid storing anything more than a few bytes there.

Use an external cache system instead. The APC extension offers a simple in-memory user cache, or otherwise you can use Memcached for a cache system that can be shared between many php servers.

Lazy loading is not difficult:

...
private static $my_cached_object = null;
public static function GetMyObject() {
   if (null === self::$my_cached_object) {

      self::$my_cached_object = load_my_object();

   }
   return self::$my_cached_object;
}
...

如何读取大XML数据并在PHP中缓存它

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