Propset eol-style to CRLF

simplified paragraph tag cleanup regex

1 files changed, 757 insertions, 757 deletions

diff --git a/system/libraries/Session.php b/system/libraries/Session.php
index 660ce8f16..25bf21fb1 100644
--- a/system/libraries/Session.php
+++ b/system/libraries/Session.php
@@ -1,758 +1,758 @@
-<?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) 2008, EllisLab, Inc.
- * @license		http://codeigniter.com/user_guide/license.html
- * @link		http://codeigniter.com
- * @since		Version 1.0
- * @filesource
- */
-
-// ------------------------------------------------------------------------
-
-/**
- * Session Class
- *
- * @package		CodeIgniter
- * @subpackage	Libraries
- * @category	Sessions
- * @author		ExpressionEngine Dev Team
- * @link		http://codeigniter.com/user_guide/libraries/sessions.html
- */
-class CI_Session {
-
-	var $sess_encrypt_cookie		= FALSE;
-	var $sess_use_database			= FALSE;
-	var $sess_table_name			= '';
-	var $sess_expiration			= 7200;
-	var $sess_match_ip				= FALSE;
-	var $sess_match_useragent		= TRUE;
-	var $sess_cookie_name			= 'ci_session';
-	var $cookie_prefix				= '';
-	var $cookie_path				= '';
-	var $cookie_domain				= '';
-	var $sess_time_to_update		= 300;
-	var $encryption_key				= '';
-	var $flashdata_key 				= 'flash';
-	var $time_reference				= 'time';
-	var $gc_probability				= 5;
-	var $userdata					= array();
-	var $CI;
-	var $now;
-
-	/**
-	 * Session Constructor
-	 *
-	 * The constructor runs the session routines automatically
-	 * whenever the class is instantiated.
-	 */
-	function CI_Session($params = array())
-	{
-		log_message('debug', "Session Class Initialized");
-
-		// Set the super object to a local variable for use throughout the class
-		$this->CI =& get_instance();
-
-		// Set all the session preferences, which can either be set
-		// manually via the $params array above or via the config file
-		foreach (array('sess_encrypt_cookie', 'sess_use_database', 'sess_table_name', 'sess_expiration', 'sess_match_ip', 'sess_match_useragent', 'sess_cookie_name', 'cookie_path', 'cookie_domain', 'sess_time_to_update', 'time_reference', 'cookie_prefix', 'encryption_key') as $key)
-		{
-			$this->$key = (isset($params[$key])) ? $params[$key] : $this->CI->config->item($key);
-		}
-
-		// Load the string helper so we can use the strip_slashes() function
-		$this->CI->load->helper('string');
-
-		// Do we need encryption? If so, load the encryption class
-		if ($this->sess_encrypt_cookie == TRUE)
-		{
-			$this->CI->load->library('encrypt');
-		}
-
-		// Are we using a database?  If so, load it
-		if ($this->sess_use_database === TRUE AND $this->sess_table_name != '')
-		{
-			$this->CI->load->database();
-		}
-
-		// Set the "now" time.  Can either be GMT or server time, based on the
-		// config prefs.  We use this to set the "last activity" time
-		$this->now = $this->_get_time();
-
-		// Set the session length. If the session expiration is
-		// set to zero we'll set the expiration two years from now.
-		if ($this->sess_expiration == 0)
-		{
-			$this->sess_expiration = (60*60*24*365*2);
-		}
-		 
-		// Set the cookie name
-		$this->sess_cookie_name = $this->cookie_prefix.$this->sess_cookie_name;
-
-		// Run the Session routine. If a session doesn't exist we'll
-		// create a new one.  If it does, we'll update it.
-		if ( ! $this->sess_read())
-		{
-			$this->sess_create();
-		}
-		else
-		{
-			$this->sess_update();
-		}
-
-		// Delete 'old' flashdata (from last request)
-	   	$this->_flashdata_sweep();
-
-		// Mark all new flashdata as old (data will be deleted before next request)
-	   	$this->_flashdata_mark();
-
-		// Delete expired sessions if necessary
-		$this->_sess_gc();
-
-		log_message('debug', "Session routines successfully run");
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Fetch the current session data if it exists
-	 *
-	 * @access	public
-	 * @return	bool
-	 */
-	function sess_read()
-	{
-		// Fetch the cookie
-		$session = $this->CI->input->cookie($this->sess_cookie_name);
-
-		// No cookie?  Goodbye cruel world!...
-		if ($session === FALSE)
-		{
-			log_message('debug', 'A session cookie was not found.');
-			return FALSE;
-		}
-
-		// Decrypt the cookie data
-		if ($this->sess_encrypt_cookie == TRUE)
-		{
-			$session = $this->CI->encrypt->decode($session);
-		}
-		else
-		{
-			// encryption was not used, so we need to check the md5 hash
-			$hash	 = substr($session, strlen($session)-32); // get last 32 chars
-			$session = substr($session, 0, strlen($session)-32);
-
-			// Does the md5 hash match?  This is to prevent manipulation of session data in userspace
-			if ($hash !==  md5($session.$this->encryption_key))
-			{
-				log_message('error', 'The session cookie data did not match what was expected. This could be a possible hacking attempt.');
-				$this->sess_destroy();
-				return FALSE;
-			}
-		}
-
-		// Unserialize the session array
-		$session = $this->_unserialize($session);
-
-		// Is the session data we unserialized an array with the correct format?
-		if ( ! is_array($session) OR ! isset($session['session_id']) OR ! isset($session['ip_address']) OR ! isset($session['user_agent']) OR ! isset($session['last_activity']))
-		{
-			$this->sess_destroy();
-			return FALSE;
-		}
-
-		// Is the session current?
-		if (($session['last_activity'] + $this->sess_expiration) < $this->now)
-		{
-			$this->sess_destroy();
-			return FALSE;
-		}
-
-		// Does the IP Match?
-		if ($this->sess_match_ip == TRUE AND $session['ip_address'] != $this->CI->input->ip_address())
-		{
-			$this->sess_destroy();
-			return FALSE;
-		}
-
-		// Does the User Agent Match?
-		if ($this->sess_match_useragent == TRUE AND trim($session['user_agent']) != trim(substr($this->CI->input->user_agent(), 0, 50)))
-		{
-			$this->sess_destroy();
-			return FALSE;
-		}
-
-		// Is there a corresponding session in the DB?
-		if ($this->sess_use_database === TRUE)
-		{
-			$this->CI->db->where('session_id', $session['session_id']);
-
-			if ($this->sess_match_ip == TRUE)
-			{
-				$this->CI->db->where('ip_address', $session['ip_address']);
-			}
-
-			if ($this->sess_match_useragent == TRUE)
-			{
-				$this->CI->db->where('user_agent', $session['user_agent']);
-			}
-
-			$query = $this->CI->db->get($this->sess_table_name);
-
-			// No result?  Kill it!
-			if ($query->num_rows() == 0)
-			{
-				$this->sess_destroy();
-				return FALSE;
-			}
-
-			// Is there custom data?  If so, add it to the main session array
-			$row = $query->row();
-			if (isset($row->user_data) AND $row->user_data != '')
-			{
-				$custom_data = $this->_unserialize($row->user_data);
-
-				if (is_array($custom_data))
-				{
-					foreach ($custom_data as $key => $val)
-					{
-						$session[$key] = $val;
-					}
-				}
-			}
-		}
-
-		// Session is valid!
-		$this->userdata = $session;
-		unset($session);
-
-		return TRUE;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Write the session data
-	 *
-	 * @access	public
-	 * @return	void
-	 */
-	function sess_write()
-	{
-		// Are we saving custom data to the DB?  If not, all we do is update the cookie
-		if ($this->sess_use_database === FALSE)
-		{
-			$this->_set_cookie();
-			return;
-		}
-
-		// set the custom userdata, the session data we will set in a second
-		$custom_userdata = $this->userdata;
-		$cookie_userdata = array();
-
-		// Before continuing, we need to determine if there is any custom data to deal with.
-		// Let's determine this by removing the default indexes to see if there's anything left in the array
-		// and set the session data while we're at it
-		foreach (array('session_id','ip_address','user_agent','last_activity') as $val)
-		{
-			unset($custom_userdata[$val]);
-			$cookie_userdata[$val] = $this->userdata[$val];
-		}
-
-		// Did we find any custom data?  If not, we turn the empty array into a string
-		// since there's no reason to serialize and store an empty array in the DB
-		if (count($custom_userdata) === 0)
-		{
-			$custom_userdata = '';
-		}
-		else
-		{
-			// Serialize the custom data array so we can store it
-			$custom_userdata = $this->_serialize($custom_userdata);
-		}
-
-		// Run the update query
-		$this->CI->db->where('session_id', $this->userdata['session_id']);
-		$this->CI->db->update($this->sess_table_name, array('last_activity' => $this->userdata['last_activity'], 'user_data' => $custom_userdata));
-
-		// Write the cookie.  Notice that we manually pass the cookie data array to the
-		// _set_cookie() function. Normally that function will store $this->userdata, but
-		// in this case that array contains custom data, which we do not want in the cookie.
-		$this->_set_cookie($cookie_userdata);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Create a new session
-	 *
-	 * @access	public
-	 * @return	void
-	 */
-	function sess_create()
-	{
-		$sessid = '';
-		while (strlen($sessid) < 32)
-		{
-			$sessid .= mt_rand(0, mt_getrandmax());
-		}
-
-		// To make the session ID even more secure we'll combine it with the user's IP
-		$sessid .= $this->CI->input->ip_address();
-
-		$this->userdata = array(
-							'session_id' 	=> md5(uniqid($sessid, TRUE)),
-							'ip_address' 	=> $this->CI->input->ip_address(),
-							'user_agent' 	=> substr($this->CI->input->user_agent(), 0, 50),
-							'last_activity'	=> $this->now
-							);
-
-
-		// Save the data to the DB if needed
-		if ($this->sess_use_database === TRUE)
-		{
-			$this->CI->db->query($this->CI->db->insert_string($this->sess_table_name, $this->userdata));
-		}
-
-		// Write the cookie
-		$this->_set_cookie();
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Update an existing session
-	 *
-	 * @access	public
-	 * @return	void
-	 */
-	function sess_update()
-	{
-		// We only update the session every five minutes by default
-		if (($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now)
-		{
-			return;
-		}
-
-		// Save the old session id so we know which record to
-		// update in the database if we need it
-		$old_sessid = $this->userdata['session_id'];
-		$new_sessid = '';
-		while (strlen($new_sessid) < 32)
-		{
-			$new_sessid .= mt_rand(0, mt_getrandmax());
-		}
-
-		// To make the session ID even more secure we'll combine it with the user's IP
-		$new_sessid .= $this->CI->input->ip_address();
-
-		// Turn it into a hash
-		$new_sessid = md5(uniqid($new_sessid, TRUE));
-
-		// Update the session data in the session data array
-		$this->userdata['session_id'] = $new_sessid;
-		$this->userdata['last_activity'] = $this->now;
-
-		// _set_cookie() will handle this for us if we aren't using database sessions
-		// by pushing all userdata to the cookie.
-		$cookie_data = NULL;
-
-		// Update the session ID and last_activity field in the DB if needed
-		if ($this->sess_use_database === TRUE)
-		{
-			// set cookie explicitly to only have our session data
-			$cookie_data = array();
-			foreach (array('session_id','ip_address','user_agent','last_activity') as $val)
-			{
-				$cookie_data[$val] = $this->userdata[$val];
-			}
-
-			$this->CI->db->query($this->CI->db->update_string($this->sess_table_name, array('last_activity' => $this->now, 'session_id' => $new_sessid), array('session_id' => $old_sessid)));
-		}
-
-		// Write the cookie
-		$this->_set_cookie($cookie_data);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Destroy the current session
-	 *
-	 * @access	public
-	 * @return	void
-	 */
-	function sess_destroy()
-	{
-		// Kill the session DB row
-		if ($this->sess_use_database === TRUE AND isset($this->userdata['session_id']))
-		{
-			$this->CI->db->where('session_id', $this->userdata['session_id']);
-			$this->CI->db->delete($this->sess_table_name);
-		}
-
-		// Kill the cookie
-		setcookie(
-					$this->sess_cookie_name,
-					addslashes(serialize(array())),
-					($this->now - 31500000),
-					$this->cookie_path,
-					$this->cookie_domain,
-					0
-				);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Fetch a specific item from the session array
-	 *
-	 * @access	public
-	 * @param	string
-	 * @return	string
-	 */
-	function userdata($item)
-	{
-		return ( ! isset($this->userdata[$item])) ? FALSE : $this->userdata[$item];
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Fetch all session data
-	 *
-	 * @access	public
-	 * @return	mixed
-	 */
-	function all_userdata()
-	{
-		return ( ! isset($this->userdata)) ? FALSE : $this->userdata;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Add or change data in the "userdata" array
-	 *
-	 * @access	public
-	 * @param	mixed
-	 * @param	string
-	 * @return	void
-	 */
-	function set_userdata($newdata = array(), $newval = '')
-	{
-		if (is_string($newdata))
-		{
-			$newdata = array($newdata => $newval);
-		}
-
-		if (count($newdata) > 0)
-		{
-			foreach ($newdata as $key => $val)
-			{
-				$this->userdata[$key] = $val;
-			}
-		}
-
-		$this->sess_write();
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Delete a session variable from the "userdata" array
-	 *
-	 * @access	array
-	 * @return	void
-	 */
-	function unset_userdata($newdata = array())
-	{
-		if (is_string($newdata))
-		{
-			$newdata = array($newdata => '');
-		}
-
-		if (count($newdata) > 0)
-		{
-			foreach ($newdata as $key => $val)
-			{
-				unset($this->userdata[$key]);
-			}
-		}
-
-		$this->sess_write();
-	}
-
-	// ------------------------------------------------------------------------
-
-	/**
-	 * Add or change flashdata, only available
-	 * until the next request
-	 *
-	 * @access	public
-	 * @param	mixed
-	 * @param	string
-	 * @return	void
-	 */
-	function set_flashdata($newdata = array(), $newval = '')
-	{
-		if (is_string($newdata))
-		{
-			$newdata = array($newdata => $newval);
-		}
-
-		if (count($newdata) > 0)
-		{
-			foreach ($newdata as $key => $val)
-			{
-				$flashdata_key = $this->flashdata_key.':new:'.$key;
-				$this->set_userdata($flashdata_key, $val);
-			}
-		}
-	}
-
-	// ------------------------------------------------------------------------
-
-	/**
-	 * Keeps existing flashdata available to next request.
-	 *
-	 * @access	public
-	 * @param	string
-	 * @return	void
-	 */
-	function keep_flashdata($key)
-	{
-		// 'old' flashdata gets removed.  Here we mark all
-		// flashdata as 'new' to preserve it from _flashdata_sweep()
-		// Note the function will return FALSE if the $key
-		// provided cannot be found
-		$old_flashdata_key = $this->flashdata_key.':old:'.$key;
-		$value = $this->userdata($old_flashdata_key);
-
-		$new_flashdata_key = $this->flashdata_key.':new:'.$key;
-		$this->set_userdata($new_flashdata_key, $value);
-	}
-
-	// ------------------------------------------------------------------------
-
-	/**
-	 * Fetch a specific flashdata item from the session array
-	 *
-	 * @access	public
-	 * @param	string
-	 * @return	string
-	 */
-	function flashdata($key)
-	{
-		$flashdata_key = $this->flashdata_key.':old:'.$key;
-		return $this->userdata($flashdata_key);
-	}
-
-	// ------------------------------------------------------------------------
-
-	/**
-	 * Identifies flashdata as 'old' for removal
-	 * when _flashdata_sweep() runs.
-	 *
-	 * @access	private
-	 * @return	void
-	 */
-	function _flashdata_mark()
-	{
-		$userdata = $this->all_userdata();
-		foreach ($userdata as $name => $value)
-		{
-			$parts = explode(':new:', $name);
-			if (is_array($parts) && count($parts) === 2)
-			{
-				$new_name = $this->flashdata_key.':old:'.$parts[1];
-				$this->set_userdata($new_name, $value);
-				$this->unset_userdata($name);
-			}
-		}
-	}
-
-	// ------------------------------------------------------------------------
-
-	/**
-	 * Removes all flashdata marked as 'old'
-	 *
-	 * @access	private
-	 * @return	void
-	 */
-
-	function _flashdata_sweep()
-	{
-		$userdata = $this->all_userdata();
-		foreach ($userdata as $key => $value)
-		{
-			if (strpos($key, ':old:'))
-			{
-				$this->unset_userdata($key);
-			}
-		}
-
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Get the "now" time
-	 *
-	 * @access	private
-	 * @return	string
-	 */
-	function _get_time()
-	{
-		if (strtolower($this->time_reference) == 'gmt')
-		{
-			$now = time();
-			$time = mktime(gmdate("H", $now), gmdate("i", $now), gmdate("s", $now), gmdate("m", $now), gmdate("d", $now), gmdate("Y", $now));
-		}
-		else
-		{
-			$time = time();
-		}
-
-		return $time;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Write the session cookie
-	 *
-	 * @access	public
-	 * @return	void
-	 */
-	function _set_cookie($cookie_data = NULL)
-	{
-		if (is_null($cookie_data))
-		{
-			$cookie_data = $this->userdata;
-		}
-
-		// Serialize the userdata for the cookie
-		$cookie_data = $this->_serialize($cookie_data);
-
-		if ($this->sess_encrypt_cookie == TRUE)
-		{
-			$cookie_data = $this->CI->encrypt->encode($cookie_data);
-		}
-		else
-		{
-			// if encryption is not used, we provide an md5 hash to prevent userside tampering
-			$cookie_data = $cookie_data.md5($cookie_data.$this->encryption_key);
-		}
-
-		// Set the cookie
-		setcookie(
-					$this->sess_cookie_name,
-					$cookie_data,
-					$this->sess_expiration + time(),
-					$this->cookie_path,
-					$this->cookie_domain,
-					0
-				);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Serialize an array
-	 *
-	 * This function first converts any slashes found in the array to a temporary
-	 * marker, so when it gets unserialized the slashes will be preserved
-	 *
-	 * @access	private
-	 * @param	array
-	 * @return	string
-	 */
-	function _serialize($data)
-	{
-		if (is_array($data))
-		{
-			foreach ($data as $key => $val)
-			{
-				$data[$key] = str_replace('\\', '{{slash}}', $val);
-			}
-		}
-		else
-		{
-			$data = str_replace('\\', '{{slash}}', $data);
-		}
-
-		return serialize($data);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Unserialize
-	 *
-	 * This function unserializes a data string, then converts any
-	 * temporary slash markers back to actual slashes
-	 *
-	 * @access	private
-	 * @param	array
-	 * @return	string
-	 */
-	function _unserialize($data)
-	{
-		$data = @unserialize(strip_slashes($data));
-
-		if (is_array($data))
-		{
-			foreach ($data as $key => $val)
-			{
-				$data[$key] = str_replace('{{slash}}', '\\', $val);
-			}
-
-			return $data;
-		}
-
-		return str_replace('{{slash}}', '\\', $data);
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Garbage collection
-	 *
-	 * This deletes expired session rows from database
-	 * if the probability percentage is met
-	 *
-	 * @access	public
-	 * @return	void
-	 */
-	function _sess_gc()
-	{
-		if ($this->sess_use_database != TRUE)
-		{
-			return;
-		}
-
-		srand(time());
-		if ((rand() % 100) < $this->gc_probability)
-		{
-			$expire = $this->now - $this->sess_expiration;
-
-			$this->CI->db->where("last_activity < {$expire}");
-			$this->CI->db->delete($this->sess_table_name);
-
-			log_message('debug', 'Session garbage collection performed.');
-		}
-	}
-
-
-}
-// END Session Class
-
-/* End of file Session.php */
+<?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) 2008, EllisLab, Inc.

+ * @license		http://codeigniter.com/user_guide/license.html

+ * @link		http://codeigniter.com

+ * @since		Version 1.0

+ * @filesource

+ */

+

+// ------------------------------------------------------------------------

+

+/**

+ * Session Class

+ *

+ * @package		CodeIgniter

+ * @subpackage	Libraries

+ * @category	Sessions

+ * @author		ExpressionEngine Dev Team

+ * @link		http://codeigniter.com/user_guide/libraries/sessions.html

+ */

+class CI_Session {

+

+	var $sess_encrypt_cookie		= FALSE;

+	var $sess_use_database			= FALSE;

+	var $sess_table_name			= '';

+	var $sess_expiration			= 7200;

+	var $sess_match_ip				= FALSE;

+	var $sess_match_useragent		= TRUE;

+	var $sess_cookie_name			= 'ci_session';

+	var $cookie_prefix				= '';

+	var $cookie_path				= '';

+	var $cookie_domain				= '';

+	var $sess_time_to_update		= 300;

+	var $encryption_key				= '';

+	var $flashdata_key 				= 'flash';

+	var $time_reference				= 'time';

+	var $gc_probability				= 5;

+	var $userdata					= array();

+	var $CI;

+	var $now;

+

+	/**

+	 * Session Constructor

+	 *

+	 * The constructor runs the session routines automatically

+	 * whenever the class is instantiated.

+	 */

+	function CI_Session($params = array())

+	{

+		log_message('debug', "Session Class Initialized");

+

+		// Set the super object to a local variable for use throughout the class

+		$this->CI =& get_instance();

+

+		// Set all the session preferences, which can either be set

+		// manually via the $params array above or via the config file

+		foreach (array('sess_encrypt_cookie', 'sess_use_database', 'sess_table_name', 'sess_expiration', 'sess_match_ip', 'sess_match_useragent', 'sess_cookie_name', 'cookie_path', 'cookie_domain', 'sess_time_to_update', 'time_reference', 'cookie_prefix', 'encryption_key') as $key)

+		{

+			$this->$key = (isset($params[$key])) ? $params[$key] : $this->CI->config->item($key);

+		}

+

+		// Load the string helper so we can use the strip_slashes() function

+		$this->CI->load->helper('string');

+

+		// Do we need encryption? If so, load the encryption class

+		if ($this->sess_encrypt_cookie == TRUE)

+		{

+			$this->CI->load->library('encrypt');

+		}

+

+		// Are we using a database?  If so, load it

+		if ($this->sess_use_database === TRUE AND $this->sess_table_name != '')

+		{

+			$this->CI->load->database();

+		}

+

+		// Set the "now" time.  Can either be GMT or server time, based on the

+		// config prefs.  We use this to set the "last activity" time

+		$this->now = $this->_get_time();

+

+		// Set the session length. If the session expiration is

+		// set to zero we'll set the expiration two years from now.

+		if ($this->sess_expiration == 0)

+		{

+			$this->sess_expiration = (60*60*24*365*2);

+		}

+		 

+		// Set the cookie name

+		$this->sess_cookie_name = $this->cookie_prefix.$this->sess_cookie_name;

+

+		// Run the Session routine. If a session doesn't exist we'll

+		// create a new one.  If it does, we'll update it.

+		if ( ! $this->sess_read())

+		{

+			$this->sess_create();

+		}

+		else

+		{

+			$this->sess_update();

+		}

+

+		// Delete 'old' flashdata (from last request)

+	   	$this->_flashdata_sweep();

+

+		// Mark all new flashdata as old (data will be deleted before next request)

+	   	$this->_flashdata_mark();

+

+		// Delete expired sessions if necessary

+		$this->_sess_gc();

+

+		log_message('debug', "Session routines successfully run");

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Fetch the current session data if it exists

+	 *

+	 * @access	public

+	 * @return	bool

+	 */

+	function sess_read()

+	{

+		// Fetch the cookie

+		$session = $this->CI->input->cookie($this->sess_cookie_name);

+

+		// No cookie?  Goodbye cruel world!...

+		if ($session === FALSE)

+		{

+			log_message('debug', 'A session cookie was not found.');

+			return FALSE;

+		}

+

+		// Decrypt the cookie data

+		if ($this->sess_encrypt_cookie == TRUE)

+		{

+			$session = $this->CI->encrypt->decode($session);

+		}

+		else

+		{

+			// encryption was not used, so we need to check the md5 hash

+			$hash	 = substr($session, strlen($session)-32); // get last 32 chars

+			$session = substr($session, 0, strlen($session)-32);

+

+			// Does the md5 hash match?  This is to prevent manipulation of session data in userspace

+			if ($hash !==  md5($session.$this->encryption_key))

+			{

+				log_message('error', 'The session cookie data did not match what was expected. This could be a possible hacking attempt.');

+				$this->sess_destroy();

+				return FALSE;

+			}

+		}

+

+		// Unserialize the session array

+		$session = $this->_unserialize($session);

+

+		// Is the session data we unserialized an array with the correct format?

+		if ( ! is_array($session) OR ! isset($session['session_id']) OR ! isset($session['ip_address']) OR ! isset($session['user_agent']) OR ! isset($session['last_activity']))

+		{

+			$this->sess_destroy();

+			return FALSE;

+		}

+

+		// Is the session current?

+		if (($session['last_activity'] + $this->sess_expiration) < $this->now)

+		{

+			$this->sess_destroy();

+			return FALSE;

+		}

+

+		// Does the IP Match?

+		if ($this->sess_match_ip == TRUE AND $session['ip_address'] != $this->CI->input->ip_address())

+		{

+			$this->sess_destroy();

+			return FALSE;

+		}

+

+		// Does the User Agent Match?

+		if ($this->sess_match_useragent == TRUE AND trim($session['user_agent']) != trim(substr($this->CI->input->user_agent(), 0, 50)))

+		{

+			$this->sess_destroy();

+			return FALSE;

+		}

+

+		// Is there a corresponding session in the DB?

+		if ($this->sess_use_database === TRUE)

+		{

+			$this->CI->db->where('session_id', $session['session_id']);

+

+			if ($this->sess_match_ip == TRUE)

+			{

+				$this->CI->db->where('ip_address', $session['ip_address']);

+			}

+

+			if ($this->sess_match_useragent == TRUE)

+			{

+				$this->CI->db->where('user_agent', $session['user_agent']);

+			}

+

+			$query = $this->CI->db->get($this->sess_table_name);

+

+			// No result?  Kill it!

+			if ($query->num_rows() == 0)

+			{

+				$this->sess_destroy();

+				return FALSE;

+			}

+

+			// Is there custom data?  If so, add it to the main session array

+			$row = $query->row();

+			if (isset($row->user_data) AND $row->user_data != '')

+			{

+				$custom_data = $this->_unserialize($row->user_data);

+

+				if (is_array($custom_data))

+				{

+					foreach ($custom_data as $key => $val)

+					{

+						$session[$key] = $val;

+					}

+				}

+			}

+		}

+

+		// Session is valid!

+		$this->userdata = $session;

+		unset($session);

+

+		return TRUE;

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Write the session data

+	 *

+	 * @access	public

+	 * @return	void

+	 */

+	function sess_write()

+	{

+		// Are we saving custom data to the DB?  If not, all we do is update the cookie

+		if ($this->sess_use_database === FALSE)

+		{

+			$this->_set_cookie();

+			return;

+		}

+

+		// set the custom userdata, the session data we will set in a second

+		$custom_userdata = $this->userdata;

+		$cookie_userdata = array();

+

+		// Before continuing, we need to determine if there is any custom data to deal with.

+		// Let's determine this by removing the default indexes to see if there's anything left in the array

+		// and set the session data while we're at it

+		foreach (array('session_id','ip_address','user_agent','last_activity') as $val)

+		{

+			unset($custom_userdata[$val]);

+			$cookie_userdata[$val] = $this->userdata[$val];

+		}

+

+		// Did we find any custom data?  If not, we turn the empty array into a string

+		// since there's no reason to serialize and store an empty array in the DB

+		if (count($custom_userdata) === 0)

+		{

+			$custom_userdata = '';

+		}

+		else

+		{

+			// Serialize the custom data array so we can store it

+			$custom_userdata = $this->_serialize($custom_userdata);

+		}

+

+		// Run the update query

+		$this->CI->db->where('session_id', $this->userdata['session_id']);

+		$this->CI->db->update($this->sess_table_name, array('last_activity' => $this->userdata['last_activity'], 'user_data' => $custom_userdata));

+

+		// Write the cookie.  Notice that we manually pass the cookie data array to the

+		// _set_cookie() function. Normally that function will store $this->userdata, but

+		// in this case that array contains custom data, which we do not want in the cookie.

+		$this->_set_cookie($cookie_userdata);

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Create a new session

+	 *

+	 * @access	public

+	 * @return	void

+	 */

+	function sess_create()

+	{

+		$sessid = '';

+		while (strlen($sessid) < 32)

+		{

+			$sessid .= mt_rand(0, mt_getrandmax());

+		}

+

+		// To make the session ID even more secure we'll combine it with the user's IP

+		$sessid .= $this->CI->input->ip_address();

+

+		$this->userdata = array(

+							'session_id' 	=> md5(uniqid($sessid, TRUE)),

+							'ip_address' 	=> $this->CI->input->ip_address(),

+							'user_agent' 	=> substr($this->CI->input->user_agent(), 0, 50),

+							'last_activity'	=> $this->now

+							);

+

+

+		// Save the data to the DB if needed

+		if ($this->sess_use_database === TRUE)

+		{

+			$this->CI->db->query($this->CI->db->insert_string($this->sess_table_name, $this->userdata));

+		}

+

+		// Write the cookie

+		$this->_set_cookie();

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Update an existing session

+	 *

+	 * @access	public

+	 * @return	void

+	 */

+	function sess_update()

+	{

+		// We only update the session every five minutes by default

+		if (($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now)

+		{

+			return;

+		}

+

+		// Save the old session id so we know which record to

+		// update in the database if we need it

+		$old_sessid = $this->userdata['session_id'];

+		$new_sessid = '';

+		while (strlen($new_sessid) < 32)

+		{

+			$new_sessid .= mt_rand(0, mt_getrandmax());

+		}

+

+		// To make the session ID even more secure we'll combine it with the user's IP

+		$new_sessid .= $this->CI->input->ip_address();

+

+		// Turn it into a hash

+		$new_sessid = md5(uniqid($new_sessid, TRUE));

+

+		// Update the session data in the session data array

+		$this->userdata['session_id'] = $new_sessid;

+		$this->userdata['last_activity'] = $this->now;

+

+		// _set_cookie() will handle this for us if we aren't using database sessions

+		// by pushing all userdata to the cookie.

+		$cookie_data = NULL;

+

+		// Update the session ID and last_activity field in the DB if needed

+		if ($this->sess_use_database === TRUE)

+		{

+			// set cookie explicitly to only have our session data

+			$cookie_data = array();

+			foreach (array('session_id','ip_address','user_agent','last_activity') as $val)

+			{

+				$cookie_data[$val] = $this->userdata[$val];

+			}

+

+			$this->CI->db->query($this->CI->db->update_string($this->sess_table_name, array('last_activity' => $this->now, 'session_id' => $new_sessid), array('session_id' => $old_sessid)));

+		}

+

+		// Write the cookie

+		$this->_set_cookie($cookie_data);

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Destroy the current session

+	 *

+	 * @access	public

+	 * @return	void

+	 */

+	function sess_destroy()

+	{

+		// Kill the session DB row

+		if ($this->sess_use_database === TRUE AND isset($this->userdata['session_id']))

+		{

+			$this->CI->db->where('session_id', $this->userdata['session_id']);

+			$this->CI->db->delete($this->sess_table_name);

+		}

+

+		// Kill the cookie

+		setcookie(

+					$this->sess_cookie_name,

+					addslashes(serialize(array())),

+					($this->now - 31500000),

+					$this->cookie_path,

+					$this->cookie_domain,

+					0

+				);

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Fetch a specific item from the session array

+	 *

+	 * @access	public

+	 * @param	string

+	 * @return	string

+	 */

+	function userdata($item)

+	{

+		return ( ! isset($this->userdata[$item])) ? FALSE : $this->userdata[$item];

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Fetch all session data

+	 *

+	 * @access	public

+	 * @return	mixed

+	 */

+	function all_userdata()

+	{

+		return ( ! isset($this->userdata)) ? FALSE : $this->userdata;

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Add or change data in the "userdata" array

+	 *

+	 * @access	public

+	 * @param	mixed

+	 * @param	string

+	 * @return	void

+	 */

+	function set_userdata($newdata = array(), $newval = '')

+	{

+		if (is_string($newdata))

+		{

+			$newdata = array($newdata => $newval);

+		}

+

+		if (count($newdata) > 0)

+		{

+			foreach ($newdata as $key => $val)

+			{

+				$this->userdata[$key] = $val;

+			}

+		}

+

+		$this->sess_write();

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Delete a session variable from the "userdata" array

+	 *

+	 * @access	array

+	 * @return	void

+	 */

+	function unset_userdata($newdata = array())

+	{

+		if (is_string($newdata))

+		{

+			$newdata = array($newdata => '');

+		}

+

+		if (count($newdata) > 0)

+		{

+			foreach ($newdata as $key => $val)

+			{

+				unset($this->userdata[$key]);

+			}

+		}

+

+		$this->sess_write();

+	}

+

+	// ------------------------------------------------------------------------

+

+	/**

+	 * Add or change flashdata, only available

+	 * until the next request

+	 *

+	 * @access	public

+	 * @param	mixed

+	 * @param	string

+	 * @return	void

+	 */

+	function set_flashdata($newdata = array(), $newval = '')

+	{

+		if (is_string($newdata))

+		{

+			$newdata = array($newdata => $newval);

+		}

+

+		if (count($newdata) > 0)

+		{

+			foreach ($newdata as $key => $val)

+			{

+				$flashdata_key = $this->flashdata_key.':new:'.$key;

+				$this->set_userdata($flashdata_key, $val);

+			}

+		}

+	}

+

+	// ------------------------------------------------------------------------

+

+	/**

+	 * Keeps existing flashdata available to next request.

+	 *

+	 * @access	public

+	 * @param	string

+	 * @return	void

+	 */

+	function keep_flashdata($key)

+	{

+		// 'old' flashdata gets removed.  Here we mark all

+		// flashdata as 'new' to preserve it from _flashdata_sweep()

+		// Note the function will return FALSE if the $key

+		// provided cannot be found

+		$old_flashdata_key = $this->flashdata_key.':old:'.$key;

+		$value = $this->userdata($old_flashdata_key);

+

+		$new_flashdata_key = $this->flashdata_key.':new:'.$key;

+		$this->set_userdata($new_flashdata_key, $value);

+	}

+

+	// ------------------------------------------------------------------------

+

+	/**

+	 * Fetch a specific flashdata item from the session array

+	 *

+	 * @access	public

+	 * @param	string

+	 * @return	string

+	 */

+	function flashdata($key)

+	{

+		$flashdata_key = $this->flashdata_key.':old:'.$key;

+		return $this->userdata($flashdata_key);

+	}

+

+	// ------------------------------------------------------------------------

+

+	/**

+	 * Identifies flashdata as 'old' for removal

+	 * when _flashdata_sweep() runs.

+	 *

+	 * @access	private

+	 * @return	void

+	 */

+	function _flashdata_mark()

+	{

+		$userdata = $this->all_userdata();

+		foreach ($userdata as $name => $value)

+		{

+			$parts = explode(':new:', $name);

+			if (is_array($parts) && count($parts) === 2)

+			{

+				$new_name = $this->flashdata_key.':old:'.$parts[1];

+				$this->set_userdata($new_name, $value);

+				$this->unset_userdata($name);

+			}

+		}

+	}

+

+	// ------------------------------------------------------------------------

+

+	/**

+	 * Removes all flashdata marked as 'old'

+	 *

+	 * @access	private

+	 * @return	void

+	 */

+

+	function _flashdata_sweep()

+	{

+		$userdata = $this->all_userdata();

+		foreach ($userdata as $key => $value)

+		{

+			if (strpos($key, ':old:'))

+			{

+				$this->unset_userdata($key);

+			}

+		}

+

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Get the "now" time

+	 *

+	 * @access	private

+	 * @return	string

+	 */

+	function _get_time()

+	{

+		if (strtolower($this->time_reference) == 'gmt')

+		{

+			$now = time();

+			$time = mktime(gmdate("H", $now), gmdate("i", $now), gmdate("s", $now), gmdate("m", $now), gmdate("d", $now), gmdate("Y", $now));

+		}

+		else

+		{

+			$time = time();

+		}

+

+		return $time;

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Write the session cookie

+	 *

+	 * @access	public

+	 * @return	void

+	 */

+	function _set_cookie($cookie_data = NULL)

+	{

+		if (is_null($cookie_data))

+		{

+			$cookie_data = $this->userdata;

+		}

+

+		// Serialize the userdata for the cookie

+		$cookie_data = $this->_serialize($cookie_data);

+

+		if ($this->sess_encrypt_cookie == TRUE)

+		{

+			$cookie_data = $this->CI->encrypt->encode($cookie_data);

+		}

+		else

+		{

+			// if encryption is not used, we provide an md5 hash to prevent userside tampering

+			$cookie_data = $cookie_data.md5($cookie_data.$this->encryption_key);

+		}

+

+		// Set the cookie

+		setcookie(

+					$this->sess_cookie_name,

+					$cookie_data,

+					$this->sess_expiration + time(),

+					$this->cookie_path,

+					$this->cookie_domain,

+					0

+				);

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Serialize an array

+	 *

+	 * This function first converts any slashes found in the array to a temporary

+	 * marker, so when it gets unserialized the slashes will be preserved

+	 *

+	 * @access	private

+	 * @param	array

+	 * @return	string

+	 */

+	function _serialize($data)

+	{

+		if (is_array($data))

+		{

+			foreach ($data as $key => $val)

+			{

+				$data[$key] = str_replace('\\', '{{slash}}', $val);

+			}

+		}

+		else

+		{

+			$data = str_replace('\\', '{{slash}}', $data);

+		}

+

+		return serialize($data);

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Unserialize

+	 *

+	 * This function unserializes a data string, then converts any

+	 * temporary slash markers back to actual slashes

+	 *

+	 * @access	private

+	 * @param	array

+	 * @return	string

+	 */

+	function _unserialize($data)

+	{

+		$data = @unserialize(strip_slashes($data));

+

+		if (is_array($data))

+		{

+			foreach ($data as $key => $val)

+			{

+				$data[$key] = str_replace('{{slash}}', '\\', $val);

+			}

+

+			return $data;

+		}

+

+		return str_replace('{{slash}}', '\\', $data);

+	}

+

+	// --------------------------------------------------------------------

+

+	/**

+	 * Garbage collection

+	 *

+	 * This deletes expired session rows from database

+	 * if the probability percentage is met

+	 *

+	 * @access	public

+	 * @return	void

+	 */

+	function _sess_gc()

+	{

+		if ($this->sess_use_database != TRUE)

+		{

+			return;

+		}

+

+		srand(time());

+		if ((rand() % 100) < $this->gc_probability)

+		{

+			$expire = $this->now - $this->sess_expiration;

+

+			$this->CI->db->where("last_activity < {$expire}");

+			$this->CI->db->delete($this->sess_table_name);

+

+			log_message('debug', 'Session garbage collection performed.');

+		}

+	}

+

+

+}

+// END Session Class

+

+/* End of file Session.php */

 /* Location: ./system/libraries/Session.php */
\ No newline at end of file