Caching in Zend Framework is operated by frontends while cache records are stored through backend adapters (File, Sqlite, Memcache...) through a flexible system of IDs and tags. Using those, it is easy to delete specific types of records afterwards (for example: "delete all cache records marked with a given tag").

Today I will show you how to Integrate Zend framework library in Codeigniter.
First you need to download Zend libraries (Zend Framework 1.12.3 Minimal) from their official site.
Then copy the library folder to “Application/Libraries/” folder

Paginator component is available with Zend Framework v1.6. - 1.12 This component wasn’t available in v1.5. I appreciate Zend for provide such a nice component for pagination. This component, like other component, is so loosely coupled that you can use it wherever you want without worrying about any other component at all.
If you have already created pages and you want to apply pagination to them, it would not be a big deal.