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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Cache
  * @subpackage Zend_Cache_Backend
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Cache_Backend_Interface
  */
 // require_once 'Zend/Cache/Backend/Interface.php';
 
 /**
  * @package    Zend_Cache
  * @subpackage Zend_Cache_Backend
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 interface Zend_Cache_Backend_ExtendedInterface extends Zend_Cache_Backend_Interface
 {
 
     /**
      * Return an array of stored cache ids
      *
      * @return array array of stored cache ids (string)
      */
     public function getIds();
 
     /**
      * Return an array of stored tags
      *
      * @return array array of stored tags (string)
      */
     public function getTags();
 
     /**
      * Return an array of stored cache ids which match given tags
      *
      * In case of multiple tags, a logical AND is made between tags
      *
      * @param array $tags array of tags
      * @return array array of matching cache ids (string)
      */
     public function getIdsMatchingTags($tags = array());
 
     /**
      * Return an array of stored cache ids which don't match given tags
      *
      * In case of multiple tags, a logical OR is made between tags
      *
      * @param array $tags array of tags
      * @return array array of not matching cache ids (string)
      */
     public function getIdsNotMatchingTags($tags = array());
 
     /**
      * Return an array of stored cache ids which match any given tags
      *
      * In case of multiple tags, a logical AND is made between tags
      *
      * @param array $tags array of tags
      * @return array array of any matching cache ids (string)
      */
     public function getIdsMatchingAnyTags($tags = array());
 
     /**
      * Return the filling percentage of the backend storage
      *
      * @return int integer between 0 and 100
      */
     public function getFillingPercentage();
 
     /**
      * Return an array of metadatas for the given cache id
      *
      * The array must include these keys :
      * - expire : the expire timestamp
      * - tags : a string array of tags
      * - mtime : timestamp of last modification time
      *
      * @param string $id cache id
      * @return array array of metadatas (false if the cache id is not found)
      */
     public function getMetadatas($id);
 
     /**
      * Give (if possible) an extra lifetime to the given cache id
      *
      * @param string $id cache id
      * @param int $extraLifetime
      * @return boolean true if ok
      */
     public function touch($id, $extraLifetime);
 
     /**
      * Return an associative array of capabilities (booleans) of the backend
      *
      * The array must include these keys :
      * - automatic_cleaning (is automating cleaning necessary)
      * - tags (are tags supported)
      * - expired_read (is it possible to read expired cache records
      *                 (for doNotTestCacheValidity option for example))
      * - priority does the backend deal with priority when saving
      * - infinite_lifetime (is infinite lifetime can work with this backend)
      * - get_list (is it possible to get the list of cache ids and the complete list of tags)
      *
      * @return array associative of with capabilities
      */
     public function getCapabilities();
 
 }