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<?php defined('SYSPATH') or die('No direct script access.');
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/**
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* Cache driver interface
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*/
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interface Cache_Driver
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{
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/**
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* Set a cache item.
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*/
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public function set($id, $data, $tags, $expiration);
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/**
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* Find all of the cache ids for a given tag.
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*/
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public function find($tag);
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/**
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* Get a cache item.
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*/
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public function get($id);
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/**
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* Delete cache items by id or tag.
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*/
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public function delete($id, $tag = FALSE);
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/**
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* Deletes all expired cache items.
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*/
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public function delete_expired();
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} // End Cache Driver
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