196 lines
No EOL
4.1 KiB
PHP
196 lines
No EOL
4.1 KiB
PHP
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP 4.3.2 or newer
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*
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* @package CodeIgniter
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* @author ExpressionEngine Dev Team
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* @copyright Copyright (c) 2006 - 2011 EllisLab, Inc.
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* @license http://codeigniter.com/user_guide/license.html
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* @link http://codeigniter.com
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* @since Version 2.0
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* @filesource
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*/
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// ------------------------------------------------------------------------
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/**
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* CodeIgniter Memcached Caching Class
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*
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* @package CodeIgniter
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* @subpackage Libraries
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* @category Core
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* @author ExpressionEngine Dev Team
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* @link
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*/
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class CI_Cache_file extends CI_Driver {
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protected $_cache_path;
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/**
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* Constructor
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*/
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public function __construct()
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{
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$CI =& get_instance();
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$CI->load->helper('file');
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$path = $CI->config->item('cache_path');
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$this->_cache_path = ($path == '') ? APPPATH.'cache/' : $path;
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}
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// ------------------------------------------------------------------------
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/**
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* Fetch from cache
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*
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* @param mixed unique key id
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* @return mixed data on success/false on failure
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*/
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public function get($id)
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{
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if ( ! file_exists($this->_cache_path.$id))
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{
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return FALSE;
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}
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$data = read_file($this->_cache_path.$id);
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$data = unserialize($data);
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if (time() > $data['time'] + $data['ttl'])
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{
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unlink($this->_cache_path.$id);
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return FALSE;
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}
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return $data['data'];
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}
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// ------------------------------------------------------------------------
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/**
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* Save into cache
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*
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* @param string unique key
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* @param mixed data to store
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* @param int length of time (in seconds) the cache is valid
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* - Default is 60 seconds
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* @return boolean true on success/false on failure
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*/
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public function save($id, $data, $ttl = 60)
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{
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$contents = array(
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'time' => time(),
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'ttl' => $ttl,
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'data' => $data
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);
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if (write_file($this->_cache_path.$id, serialize($contents)))
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{
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@chmod($this->_cache_path.$id, 0777);
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return TRUE;
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}
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return FALSE;
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}
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// ------------------------------------------------------------------------
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/**
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* Delete from Cache
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*
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* @param mixed unique identifier of item in cache
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* @return boolean true on success/false on failure
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*/
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public function delete($id)
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{
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return unlink($this->_cache_path.$id);
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}
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// ------------------------------------------------------------------------
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/**
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* Clean the Cache
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*
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* @return boolean false on failure/true on success
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*/
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public function clean()
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{
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return delete_files($this->_cache_path);
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}
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// ------------------------------------------------------------------------
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/**
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* Cache Info
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*
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* Not supported by file-based caching
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*
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* @param string user/filehits
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* @return mixed FALSE
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*/
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public function cache_info($type = NULL)
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{
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return get_dir_file_info($this->_cache_path);
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}
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// ------------------------------------------------------------------------
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/**
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* Get Cache Metadata
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*
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* @param mixed key to get cache metadata on
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* @return mixed FALSE on failure, array on success.
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*/
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public function get_metadata($id)
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{
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if ( ! file_exists($this->_cache_path.$id))
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{
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return FALSE;
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}
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$data = read_file($this->_cache_path.$id);
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$data = unserialize($data);
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if (is_array($data))
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{
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$data = $data['data'];
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$mtime = filemtime($this->_cache_path.$id);
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if ( ! isset($data['ttl']))
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{
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return FALSE;
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}
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return array(
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'expire' => $mtime + $data['ttl'],
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'mtime' => $mtime
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);
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}
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return FALSE;
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}
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// ------------------------------------------------------------------------
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/**
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* Is supported
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*
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* In the file driver, check to see that the cache directory is indeed writable
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*
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* @return boolean
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*/
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public function is_supported()
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{
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return is_really_writable($this->_cache_path);
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}
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// ------------------------------------------------------------------------
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}
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// End Class
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/* End of file Cache_file.php */
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/* Location: ./system/libraries/Cache/drivers/Cache_file.php */ |