BlackHole.php

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<?php
#require_once 'Zend/Cache/Backend/ExtendedInterface.php';

#require_once 'Zend/Cache/Backend.php';

class Zend_Cache_Backend_BlackHole
    extends Zend_Cache_Backend
    implements Zend_Cache_Backend_ExtendedInterface
{
    public function load($id, $doNotTestCacheValidity = false)
    {
        return false;
    }

    public function test($id)
    {
        return false;
    }

    public function save($data, $id, $tags = array(), $specificLifetime = false)
    {
        return true;
    }

    public function remove($id)
    {
        return true;
    }

    public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
    {
        return true;
    }

    public function getIds()
    {
        return array();
    }

    public function getTags()
    {
        return array();
    }

    public function getIdsMatchingTags($tags = array())
    {
        return array();
    }

    public function getIdsNotMatchingTags($tags = array())
    {
        return array();
    }

    public function getIdsMatchingAnyTags($tags = array())
    {
        return array();
    }

    public function getFillingPercentage()
    {
        return 0;
    }

    public function getMetadatas($id)
    {
        return false;
    }

    public function touch($id, $extraLifetime)
    {
        return false;
    }

    public function getCapabilities()
    {
        return array(
            'automatic_cleaning' => true,
            'tags'               => true,
            'expired_read'       => true,
            'priority'           => true,
            'infinite_lifetime'  => true,
            'get_list'           => true,
        );
    }

    public function ___expire($id)
    {
    }
}