Disk.php

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

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


class Zend_Cache_Backend_ZendServer_Disk extends Zend_Cache_Backend_ZendServer implements Zend_Cache_Backend_Interface
{
    public function __construct(array $options = array())
    {
        if (!function_exists('zend_disk_cache_store')) {
            Zend_Cache::throwException('Zend_Cache_ZendServer_Disk backend has to be used within Zend Server environment.');
        }
        parent::__construct($options);
    }

    protected function _store($data, $id, $timeToLive)
    {
        if (zend_disk_cache_store($this->_options['namespace'] . '::' . $id,
                                  $data,
                                  $timeToLive) === false) {
            $this->_log('Store operation failed.');
            return false;
        }
        return true;
    }

    protected function _fetch($id)
    {
        return zend_disk_cache_fetch($this->_options['namespace'] . '::' . $id);
    }

    protected function _unset($id)
    {
        return zend_disk_cache_delete($this->_options['namespace'] . '::' . $id);
    }

    protected function _clear()
    {
        zend_disk_cache_clear($this->_options['namespace']);
    }
}