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- <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
- /**
- * CodeIgniter
- *
- * An open source application development framework for PHP 4.3.2 or newer
- *
- * @package CodeIgniter
- * @author ExpressionEngine Dev Team
- * @copyright Copyright (c) 2006 - 2012 EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 2.0
- * @filesource
- */
- // ------------------------------------------------------------------------
- /**
- * CodeIgniter Memcached Caching Class
- *
- * @package CodeIgniter
- * @subpackage Libraries
- * @category Core
- * @author ExpressionEngine Dev Team
- * @link
- */
- class CI_Cache_file extends CI_Driver {
- protected $_cache_path;
- /**
- * Constructor
- */
- public function __construct()
- {
- $CI =& get_instance();
- $CI->load->helper('file');
- $path = $CI->config->item('cache_path');
- $this->_cache_path = ($path == '') ? APPPATH.'cache/' : $path;
- }
- // ------------------------------------------------------------------------
- /**
- * Fetch from cache
- *
- * @param mixed unique key id
- * @return mixed data on success/false on failure
- */
- public function get($id)
- {
- if ( ! file_exists($this->_cache_path.$id))
- {
- return FALSE;
- }
- $data = read_file($this->_cache_path.$id);
- $data = unserialize($data);
- if (time() > $data['time'] + $data['ttl'])
- {
- unlink($this->_cache_path.$id);
- return FALSE;
- }
- return $data['data'];
- }
- // ------------------------------------------------------------------------
- /**
- * Save into cache
- *
- * @param string unique key
- * @param mixed data to store
- * @param int length of time (in seconds) the cache is valid
- * - Default is 60 seconds
- * @return boolean true on success/false on failure
- */
- public function save($id, $data, $ttl = 60)
- {
- $contents = array(
- 'time' => time(),
- 'ttl' => $ttl,
- 'data' => $data
- );
- if (write_file($this->_cache_path.$id, serialize($contents)))
- {
- @chmod($this->_cache_path.$id, 0777);
- return TRUE;
- }
- return FALSE;
- }
- // ------------------------------------------------------------------------
- /**
- * Delete from Cache
- *
- * @param mixed unique identifier of item in cache
- * @return boolean true on success/false on failure
- */
- public function delete($id)
- {
- return @unlink($this->_cache_path.$id);
- }
- // ------------------------------------------------------------------------
- /**
- * Clean the Cache
- *
- * @return boolean false on failure/true on success
- */
- public function clean()
- {
- return delete_files($this->_cache_path);
- }
- // ------------------------------------------------------------------------
- /**
- * Cache Info
- *
- * Not supported by file-based caching
- *
- * @param string user/filehits
- * @return mixed FALSE
- */
- public function cache_info($type = NULL)
- {
- return get_dir_file_info($this->_cache_path);
- }
- // ------------------------------------------------------------------------
- /**
- * Get Cache Metadata
- *
- * @param mixed key to get cache metadata on
- * @return mixed FALSE on failure, array on success.
- */
- public function get_metadata($id)
- {
- if ( ! file_exists($this->_cache_path.$id))
- {
- return FALSE;
- }
- $data = read_file($this->_cache_path.$id);
- $data = unserialize($data);
- if (is_array($data))
- {
- $mtime = filemtime($this->_cache_path.$id);
- if ( ! isset($data['ttl']))
- {
- return FALSE;
- }
- return array(
- 'expire' => $mtime + $data['ttl'],
- 'mtime' => $mtime
- );
- }
- return FALSE;
- }
- // ------------------------------------------------------------------------
- /**
- * Is supported
- *
- * In the file driver, check to see that the cache directory is indeed writable
- *
- * @return boolean
- */
- public function is_supported()
- {
- return is_really_writable($this->_cache_path);
- }
- // ------------------------------------------------------------------------
- }
- // End Class
- /* End of file Cache_file.php */
- /* Location: ./system/libraries/Cache/drivers/Cache_file.php */
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