/lenasys/trunk

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20.1.1 by galaxyAbstractor
* Added an simple admin panel to the codeviewer-cmssy stuff
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<?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 5.1.6 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 - 2012 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 APC 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_apc extends CI_Driver {
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	/**
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	 * Get 
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	 *
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	 * Look for a value in the cache.  If it exists, return the data 
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	 * if not, return FALSE
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	 *
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	 * @param 	string	
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	 * @return 	mixed		value that is stored/FALSE on failure
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	 */
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	public function get($id)
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	{
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		$data = apc_fetch($id);
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		return (is_array($data)) ? $data[0] : FALSE;
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	}
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	// ------------------------------------------------------------------------	
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	/**
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	 * Cache Save
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	 *
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	 * @param 	string		Unique Key
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	 * @param 	mixed		Data to store
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	 * @param 	int			Length of time (in seconds) to cache the data
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	 *
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	 * @return 	boolean		true on success/false on failure
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	 */
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	public function save($id, $data, $ttl = 60)
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	{
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		return apc_store($id, array($data, time(), $ttl), $ttl);
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	}
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	// ------------------------------------------------------------------------
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	/**
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	 * Delete from Cache
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	 *
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	 * @param 	mixed		unique identifier of the item in the cache
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	 * @param 	boolean		true on success/false on failure
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	 */
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	public function delete($id)
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	{
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		return apc_delete($id);
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	}
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	// ------------------------------------------------------------------------
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	/**
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	 * Clean the cache
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	 *
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	 * @return 	boolean		false on failure/true on success
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	 */
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	public function clean()
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	{
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		return apc_clear_cache('user');
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	}
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	// ------------------------------------------------------------------------
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	/**
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	 * Cache Info
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	 *
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	 * @param 	string		user/filehits
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	 * @return 	mixed		array on success, false on failure	
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	 */
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	 public function cache_info($type = NULL)
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	 {
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		 return apc_cache_info($type);
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	 }
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	// ------------------------------------------------------------------------
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	/**
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	 * Get Cache Metadata
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	 *
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	 * @param 	mixed		key to get cache metadata on
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	 * @return 	mixed		array on success/false on failure
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	 */
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	public function get_metadata($id)
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	{
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		$stored = apc_fetch($id);
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		if (count($stored) !== 3)
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		{
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			return FALSE;
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		}
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		list($data, $time, $ttl) = $stored;
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		return array(
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			'expire'	=> $time + $ttl,
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			'mtime'		=> $time,
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			'data'		=> $data
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		);
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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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	 * Check to see if APC is available on this system, bail if it isn't.
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	 */
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	public function is_supported()
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	{
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		if ( ! extension_loaded('apc') OR ini_get('apc.enabled') != "1")
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		{
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			log_message('error', 'The APC PHP extension must be loaded to use APC Cache.');
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			return FALSE;
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		}
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		return TRUE;
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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_apc.php */
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/* Location: ./system/libraries/Cache/drivers/Cache_apc.php */