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You can do more elaborate grouping by setting up cache_id groups. This is accomplished by separating each sub-group with a vertical bar "|" in the cache_id value. You can have as many sub-groups as you like.
你可以通过建立cache_id集合做更祥细的集合体。在cache_id的值里用竖线"|"来分开子集合。你可以尽可能多的包含子集合。
Example 14-9. cache_id groups
|
Technical Note:The cache grouping does NOT use the path to the template as any part of the cache_id. For example, if you have display('themes/blue/index.tpl'), you cannot clear the cache for everything under the "themes/blue" directory. If you want to do that, you must group them in the cache_id, such as display('themes/blue/index.tpl','themes|blue'); Then you can clear the caches for the blue theme with clear_cache(null,'themes|blue');
技术提示:缓存集合并不像cache_id一样对模板使用路径。比如,如果你display('themes/blue/index.tpl'),那么在"themes/blue"目录下你并不能清除缓存。想要清除缓存,必须先用cache_id把缓存集合,像这样display('themes/blue/index.tpl','themes|blue');然后就可以用clear_cache(null,'themes|blue')清除blue theme(蓝色主题?!老外也真会叫...)下的缓存。