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- <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
- /**
- * CodeIgniter
- *
- * An open source application development framework for PHP 5.1.6 or newer
- *
- * @package CodeIgniter
- * @author EllisLab Dev Team
- * @copyright Copyright (c) 2006 - 2014 EllisLab, Inc.
- * @copyright Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 2.0
- * @filesource
- */
- // ------------------------------------------------------------------------
- /**
- * CodeIgniter Caching Class
- *
- * @package CodeIgniter
- * @subpackage Libraries
- * @category Core
- * @author EllisLab Dev Team
- * @link
- */
- class CI_Cache extends CI_Driver_Library {
- protected $valid_drivers = array(
- 'cache_apc', 'cache_file', 'cache_memcached', 'cache_dummy'
- );
- protected $_cache_path = NULL; // Path of cache files (if file-based cache)
- protected $_adapter = 'dummy';
- protected $_backup_driver;
- // ------------------------------------------------------------------------
- /**
- * Constructor
- *
- * @param array
- */
- public function __construct($config = array())
- {
- if ( ! empty($config))
- {
- $this->_initialize($config);
- }
- }
- // ------------------------------------------------------------------------
- /**
- * Get
- *
- * Look for a value in the cache. If it exists, return the data
- * if not, return FALSE
- *
- * @param string
- * @return mixed value that is stored/FALSE on failure
- */
- public function get($id)
- {
- return $this->{$this->_adapter}->get($id);
- }
- // ------------------------------------------------------------------------
- /**
- * Cache Save
- *
- * @param string Unique Key
- * @param mixed Data to store
- * @param int Length of time (in seconds) to cache the data
- *
- * @return boolean true on success/false on failure
- */
- public function save($id, $data, $ttl = 60)
- {
- return $this->{$this->_adapter}->save($id, $data, $ttl);
- }
- // ------------------------------------------------------------------------
- /**
- * Delete from Cache
- *
- * @param mixed unique identifier of the item in the cache
- * @return boolean true on success/false on failure
- */
- public function delete($id)
- {
- return $this->{$this->_adapter}->delete($id);
- }
- // ------------------------------------------------------------------------
- /**
- * Clean the cache
- *
- * @return boolean false on failure/true on success
- */
- public function clean()
- {
- return $this->{$this->_adapter}->clean();
- }
- // ------------------------------------------------------------------------
- /**
- * Cache Info
- *
- * @param string user/filehits
- * @return mixed array on success, false on failure
- */
- public function cache_info($type = 'user')
- {
- return $this->{$this->_adapter}->cache_info($type);
- }
- // ------------------------------------------------------------------------
- /**
- * Get Cache Metadata
- *
- * @param mixed key to get cache metadata on
- * @return mixed return value from child method
- */
- public function get_metadata($id)
- {
- return $this->{$this->_adapter}->get_metadata($id);
- }
- // ------------------------------------------------------------------------
- /**
- * Initialize
- *
- * Initialize class properties based on the configuration array.
- *
- * @param array
- * @return void
- */
- private function _initialize($config)
- {
- $default_config = array(
- 'adapter',
- 'memcached'
- );
- foreach ($default_config as $key)
- {
- if (isset($config[$key]))
- {
- $param = '_'.$key;
- $this->{$param} = $config[$key];
- }
- }
- if (isset($config['backup']))
- {
- if (in_array('cache_'.$config['backup'], $this->valid_drivers))
- {
- $this->_backup_driver = $config['backup'];
- }
- }
- }
- // ------------------------------------------------------------------------
- /**
- * Is the requested driver supported in this environment?
- *
- * @param string The driver to test.
- * @return array
- */
- public function is_supported($driver)
- {
- static $support = array();
- if ( ! isset($support[$driver]))
- {
- $support[$driver] = $this->{$driver}->is_supported();
- }
- return $support[$driver];
- }
- // ------------------------------------------------------------------------
- /**
- * __get()
- *
- * @param child
- * @return object
- */
- public function __get($child)
- {
- $obj = parent::__get($child);
- if ( ! $this->is_supported($child))
- {
- $this->_adapter = $this->_backup_driver;
- $obj = parent::__get($this->_adapter);
- }
- return $obj;
- }
- }
- /* End of file Cache.php */
- /* Location: ./system/libraries/Cache/Cache.php */
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