summaryrefslogtreecommitdiffstats
path: root/system/libraries/Session/Session.php
diff options
context:
space:
mode:
authorFlorian Pritz <bluewind@xinu.at>2017-09-26 13:46:14 +0200
committerFlorian Pritz <bluewind@xinu.at>2017-09-26 13:46:14 +0200
commit3ff6ffa3341c876b741feb66552cdd110b67872e (patch)
tree69e11cd0009ddd1346f2dc4cd8c47244368db28e /system/libraries/Session/Session.php
parentbc2f7f596f727e204e8b8c5b849545745b3cbfaa (diff)
parent81a4c8c630ef59cffea0c24e64fb6fa7f09bfcf6 (diff)
Merge CodeIgniter 3 support
Diffstat (limited to 'system/libraries/Session/Session.php')
-rw-r--r--system/libraries/Session/Session.php985
1 files changed, 985 insertions, 0 deletions
diff --git a/system/libraries/Session/Session.php b/system/libraries/Session/Session.php
new file mode 100644
index 000000000..eb433de64
--- /dev/null
+++ b/system/libraries/Session/Session.php
@@ -0,0 +1,985 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 2.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * CodeIgniter Session Class
+ *
+ * @package CodeIgniter
+ * @subpackage Libraries
+ * @category Sessions
+ * @author Andrey Andreev
+ * @link https://codeigniter.com/user_guide/libraries/sessions.html
+ */
+class CI_Session {
+
+ /**
+ * Userdata array
+ *
+ * Just a reference to $_SESSION, for BC purposes.
+ */
+ public $userdata;
+
+ protected $_driver = 'files';
+ protected $_config;
+ protected $_sid_regexp;
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * @param array $params Configuration parameters
+ * @return void
+ */
+ public function __construct(array $params = array())
+ {
+ // No sessions under CLI
+ if (is_cli())
+ {
+ log_message('debug', 'Session: Initialization under CLI aborted.');
+ return;
+ }
+ elseif ((bool) ini_get('session.auto_start'))
+ {
+ log_message('error', 'Session: session.auto_start is enabled in php.ini. Aborting.');
+ return;
+ }
+ elseif ( ! empty($params['driver']))
+ {
+ $this->_driver = $params['driver'];
+ unset($params['driver']);
+ }
+ elseif ($driver = config_item('sess_driver'))
+ {
+ $this->_driver = $driver;
+ }
+ // Note: BC workaround
+ elseif (config_item('sess_use_database'))
+ {
+ log_message('debug', 'Session: "sess_driver" is empty; using BC fallback to "sess_use_database".');
+ $this->_driver = 'database';
+ }
+
+ $class = $this->_ci_load_classes($this->_driver);
+
+ // Configuration ...
+ $this->_configure($params);
+ $this->_config['_sid_regexp'] = $this->_sid_regexp;
+
+ $class = new $class($this->_config);
+ if ($class instanceof SessionHandlerInterface)
+ {
+ if (is_php('5.4'))
+ {
+ session_set_save_handler($class, TRUE);
+ }
+ else
+ {
+ session_set_save_handler(
+ array($class, 'open'),
+ array($class, 'close'),
+ array($class, 'read'),
+ array($class, 'write'),
+ array($class, 'destroy'),
+ array($class, 'gc')
+ );
+
+ register_shutdown_function('session_write_close');
+ }
+ }
+ else
+ {
+ log_message('error', "Session: Driver '".$this->_driver."' doesn't implement SessionHandlerInterface. Aborting.");
+ return;
+ }
+
+ // Sanitize the cookie, because apparently PHP doesn't do that for userspace handlers
+ if (isset($_COOKIE[$this->_config['cookie_name']])
+ && (
+ ! is_string($_COOKIE[$this->_config['cookie_name']])
+ OR ! preg_match('#\A'.$this->_sid_regexp.'\z#', $_COOKIE[$this->_config['cookie_name']])
+ )
+ )
+ {
+ unset($_COOKIE[$this->_config['cookie_name']]);
+ }
+
+ session_start();
+
+ // Is session ID auto-regeneration configured? (ignoring ajax requests)
+ if ((empty($_SERVER['HTTP_X_REQUESTED_WITH']) OR strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) !== 'xmlhttprequest')
+ && ($regenerate_time = config_item('sess_time_to_update')) > 0
+ )
+ {
+ if ( ! isset($_SESSION['__ci_last_regenerate']))
+ {
+ $_SESSION['__ci_last_regenerate'] = time();
+ }
+ elseif ($_SESSION['__ci_last_regenerate'] < (time() - $regenerate_time))
+ {
+ $this->sess_regenerate((bool) config_item('sess_regenerate_destroy'));
+ }
+ }
+ // Another work-around ... PHP doesn't seem to send the session cookie
+ // unless it is being currently created or regenerated
+ elseif (isset($_COOKIE[$this->_config['cookie_name']]) && $_COOKIE[$this->_config['cookie_name']] === session_id())
+ {
+ setcookie(
+ $this->_config['cookie_name'],
+ session_id(),
+ (empty($this->_config['cookie_lifetime']) ? 0 : time() + $this->_config['cookie_lifetime']),
+ $this->_config['cookie_path'],
+ $this->_config['cookie_domain'],
+ $this->_config['cookie_secure'],
+ TRUE
+ );
+ }
+
+ $this->_ci_init_vars();
+
+ log_message('info', "Session: Class initialized using '".$this->_driver."' driver.");
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * CI Load Classes
+ *
+ * An internal method to load all possible dependency and extension
+ * classes. It kind of emulates the CI_Driver library, but is
+ * self-sufficient.
+ *
+ * @param string $driver Driver name
+ * @return string Driver class name
+ */
+ protected function _ci_load_classes($driver)
+ {
+ // PHP 5.4 compatibility
+ interface_exists('SessionHandlerInterface', FALSE) OR require_once(BASEPATH.'libraries/Session/SessionHandlerInterface.php');
+
+ $prefix = config_item('subclass_prefix');
+
+ if ( ! class_exists('CI_Session_driver', FALSE))
+ {
+ require_once(
+ file_exists(APPPATH.'libraries/Session/Session_driver.php')
+ ? APPPATH.'libraries/Session/Session_driver.php'
+ : BASEPATH.'libraries/Session/Session_driver.php'
+ );
+
+ if (file_exists($file_path = APPPATH.'libraries/Session/'.$prefix.'Session_driver.php'))
+ {
+ require_once($file_path);
+ }
+ }
+
+ $class = 'Session_'.$driver.'_driver';
+
+ // Allow custom drivers without the CI_ or MY_ prefix
+ if ( ! class_exists($class, FALSE) && file_exists($file_path = APPPATH.'libraries/Session/drivers/'.$class.'.php'))
+ {
+ require_once($file_path);
+ if (class_exists($class, FALSE))
+ {
+ return $class;
+ }
+ }
+
+ if ( ! class_exists('CI_'.$class, FALSE))
+ {
+ if (file_exists($file_path = APPPATH.'libraries/Session/drivers/'.$class.'.php') OR file_exists($file_path = BASEPATH.'libraries/Session/drivers/'.$class.'.php'))
+ {
+ require_once($file_path);
+ }
+
+ if ( ! class_exists('CI_'.$class, FALSE) && ! class_exists($class, FALSE))
+ {
+ throw new UnexpectedValueException("Session: Configured driver '".$driver."' was not found. Aborting.");
+ }
+ }
+
+ if ( ! class_exists($prefix.$class, FALSE) && file_exists($file_path = APPPATH.'libraries/Session/drivers/'.$prefix.$class.'.php'))
+ {
+ require_once($file_path);
+ if (class_exists($prefix.$class, FALSE))
+ {
+ return $prefix.$class;
+ }
+ else
+ {
+ log_message('debug', 'Session: '.$prefix.$class.".php found but it doesn't declare class ".$prefix.$class.'.');
+ }
+ }
+
+ return 'CI_'.$class;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Configuration
+ *
+ * Handle input parameters and configuration defaults
+ *
+ * @param array &$params Input parameters
+ * @return void
+ */
+ protected function _configure(&$params)
+ {
+ $expiration = config_item('sess_expiration');
+
+ if (isset($params['cookie_lifetime']))
+ {
+ $params['cookie_lifetime'] = (int) $params['cookie_lifetime'];
+ }
+ else
+ {
+ $params['cookie_lifetime'] = ( ! isset($expiration) && config_item('sess_expire_on_close'))
+ ? 0 : (int) $expiration;
+ }
+
+ isset($params['cookie_name']) OR $params['cookie_name'] = config_item('sess_cookie_name');
+ if (empty($params['cookie_name']))
+ {
+ $params['cookie_name'] = ini_get('session.name');
+ }
+ else
+ {
+ ini_set('session.name', $params['cookie_name']);
+ }
+
+ isset($params['cookie_path']) OR $params['cookie_path'] = config_item('cookie_path');
+ isset($params['cookie_domain']) OR $params['cookie_domain'] = config_item('cookie_domain');
+ isset($params['cookie_secure']) OR $params['cookie_secure'] = (bool) config_item('cookie_secure');
+
+ session_set_cookie_params(
+ $params['cookie_lifetime'],
+ $params['cookie_path'],
+ $params['cookie_domain'],
+ $params['cookie_secure'],
+ TRUE // HttpOnly; Yes, this is intentional and not configurable for security reasons
+ );
+
+ if (empty($expiration))
+ {
+ $params['expiration'] = (int) ini_get('session.gc_maxlifetime');
+ }
+ else
+ {
+ $params['expiration'] = (int) $expiration;
+ ini_set('session.gc_maxlifetime', $expiration);
+ }
+
+ $params['match_ip'] = (bool) (isset($params['match_ip']) ? $params['match_ip'] : config_item('sess_match_ip'));
+
+ isset($params['save_path']) OR $params['save_path'] = config_item('sess_save_path');
+
+ $this->_config = $params;
+
+ // Security is king
+ ini_set('session.use_trans_sid', 0);
+ ini_set('session.use_strict_mode', 1);
+ ini_set('session.use_cookies', 1);
+ ini_set('session.use_only_cookies', 1);
+
+ $this->_configure_sid_length();
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Configure session ID length
+ *
+ * To make life easier, we used to force SHA-1 and 4 bits per
+ * character on everyone. And of course, someone was unhappy.
+ *
+ * Then PHP 7.1 broke backwards-compatibility because ext/session
+ * is such a mess that nobody wants to touch it with a pole stick,
+ * and the one guy who does, nobody has the energy to argue with.
+ *
+ * So we were forced to make changes, and OF COURSE something was
+ * going to break and now we have this pile of shit. -- Narf
+ *
+ * @return void
+ */
+ protected function _configure_sid_length()
+ {
+ if (PHP_VERSION_ID < 70100)
+ {
+ $hash_function = ini_get('session.hash_function');
+ if (ctype_digit($hash_function))
+ {
+ if ($hash_function !== '1')
+ {
+ ini_set('session.hash_function', 1);
+ }
+
+ $bits = 160;
+ }
+ elseif ( ! in_array($hash_function, hash_algos(), TRUE))
+ {
+ ini_set('session.hash_function', 1);
+ $bits = 160;
+ }
+ elseif (($bits = strlen(hash($hash_function, 'dummy', false)) * 4) < 160)
+ {
+ ini_set('session.hash_function', 1);
+ $bits = 160;
+ }
+
+ $bits_per_character = (int) ini_get('session.hash_bits_per_character');
+ $sid_length = (int) ceil($bits / $bits_per_character);
+ }
+ else
+ {
+ $bits_per_character = (int) ini_get('session.sid_bits_per_character');
+ $sid_length = (int) ini_get('session.sid_length');
+ if (($bits = $sid_length * $bits_per_character) < 160)
+ {
+ // Add as many more characters as necessary to reach at least 160 bits
+ $sid_length += (int) ceil((160 % $bits) / $bits_per_character);
+ ini_set('session.sid_length', $sid_length);
+ }
+ }
+
+ // Yes, 4,5,6 are the only known possible values as of 2016-10-27
+ switch ($bits_per_character)
+ {
+ case 4:
+ $this->_sid_regexp = '[0-9a-f]';
+ break;
+ case 5:
+ $this->_sid_regexp = '[0-9a-v]';
+ break;
+ case 6:
+ $this->_sid_regexp = '[0-9a-zA-Z,-]';
+ break;
+ }
+
+ $this->_sid_regexp .= '{'.$sid_length.'}';
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Handle temporary variables
+ *
+ * Clears old "flash" data, marks the new one for deletion and handles
+ * "temp" data deletion.
+ *
+ * @return void
+ */
+ protected function _ci_init_vars()
+ {
+ if ( ! empty($_SESSION['__ci_vars']))
+ {
+ $current_time = time();
+
+ foreach ($_SESSION['__ci_vars'] as $key => &$value)
+ {
+ if ($value === 'new')
+ {
+ $_SESSION['__ci_vars'][$key] = 'old';
+ }
+ // Hacky, but 'old' will (implicitly) always be less than time() ;)
+ // DO NOT move this above the 'new' check!
+ elseif ($value < $current_time)
+ {
+ unset($_SESSION[$key], $_SESSION['__ci_vars'][$key]);
+ }
+ }
+
+ if (empty($_SESSION['__ci_vars']))
+ {
+ unset($_SESSION['__ci_vars']);
+ }
+ }
+
+ $this->userdata =& $_SESSION;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Mark as flash
+ *
+ * @param mixed $key Session data key(s)
+ * @return bool
+ */
+ public function mark_as_flash($key)
+ {
+ if (is_array($key))
+ {
+ for ($i = 0, $c = count($key); $i < $c; $i++)
+ {
+ if ( ! isset($_SESSION[$key[$i]]))
+ {
+ return FALSE;
+ }
+ }
+
+ $new = array_fill_keys($key, 'new');
+
+ $_SESSION['__ci_vars'] = isset($_SESSION['__ci_vars'])
+ ? array_merge($_SESSION['__ci_vars'], $new)
+ : $new;
+
+ return TRUE;
+ }
+
+ if ( ! isset($_SESSION[$key]))
+ {
+ return FALSE;
+ }
+
+ $_SESSION['__ci_vars'][$key] = 'new';
+ return TRUE;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Get flash keys
+ *
+ * @return array
+ */
+ public function get_flash_keys()
+ {
+ if ( ! isset($_SESSION['__ci_vars']))
+ {
+ return array();
+ }
+
+ $keys = array();
+ foreach (array_keys($_SESSION['__ci_vars']) as $key)
+ {
+ is_int($_SESSION['__ci_vars'][$key]) OR $keys[] = $key;
+ }
+
+ return $keys;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Unmark flash
+ *
+ * @param mixed $key Session data key(s)
+ * @return void
+ */
+ public function unmark_flash($key)
+ {
+ if (empty($_SESSION['__ci_vars']))
+ {
+ return;
+ }
+
+ is_array($key) OR $key = array($key);
+
+ foreach ($key as $k)
+ {
+ if (isset($_SESSION['__ci_vars'][$k]) && ! is_int($_SESSION['__ci_vars'][$k]))
+ {
+ unset($_SESSION['__ci_vars'][$k]);
+ }
+ }
+
+ if (empty($_SESSION['__ci_vars']))
+ {
+ unset($_SESSION['__ci_vars']);
+ }
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Mark as temp
+ *
+ * @param mixed $key Session data key(s)
+ * @param int $ttl Time-to-live in seconds
+ * @return bool
+ */
+ public function mark_as_temp($key, $ttl = 300)
+ {
+ $ttl += time();
+
+ if (is_array($key))
+ {
+ $temp = array();
+
+ foreach ($key as $k => $v)
+ {
+ // Do we have a key => ttl pair, or just a key?
+ if (is_int($k))
+ {
+ $k = $v;
+ $v = $ttl;
+ }
+ else
+ {
+ $v += time();
+ }
+
+ if ( ! isset($_SESSION[$k]))
+ {
+ return FALSE;
+ }
+
+ $temp[$k] = $v;
+ }
+
+ $_SESSION['__ci_vars'] = isset($_SESSION['__ci_vars'])
+ ? array_merge($_SESSION['__ci_vars'], $temp)
+ : $temp;
+
+ return TRUE;
+ }
+
+ if ( ! isset($_SESSION[$key]))
+ {
+ return FALSE;
+ }
+
+ $_SESSION['__ci_vars'][$key] = $ttl;
+ return TRUE;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Get temp keys
+ *
+ * @return array
+ */
+ public function get_temp_keys()
+ {
+ if ( ! isset($_SESSION['__ci_vars']))
+ {
+ return array();
+ }
+
+ $keys = array();
+ foreach (array_keys($_SESSION['__ci_vars']) as $key)
+ {
+ is_int($_SESSION['__ci_vars'][$key]) && $keys[] = $key;
+ }
+
+ return $keys;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Unmark flash
+ *
+ * @param mixed $key Session data key(s)
+ * @return void
+ */
+ public function unmark_temp($key)
+ {
+ if (empty($_SESSION['__ci_vars']))
+ {
+ return;
+ }
+
+ is_array($key) OR $key = array($key);
+
+ foreach ($key as $k)
+ {
+ if (isset($_SESSION['__ci_vars'][$k]) && is_int($_SESSION['__ci_vars'][$k]))
+ {
+ unset($_SESSION['__ci_vars'][$k]);
+ }
+ }
+
+ if (empty($_SESSION['__ci_vars']))
+ {
+ unset($_SESSION['__ci_vars']);
+ }
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * __get()
+ *
+ * @param string $key 'session_id' or a session data key
+ * @return mixed
+ */
+ public function __get($key)
+ {
+ // Note: Keep this order the same, just in case somebody wants to
+ // use 'session_id' as a session data key, for whatever reason
+ if (isset($_SESSION[$key]))
+ {
+ return $_SESSION[$key];
+ }
+ elseif ($key === 'session_id')
+ {
+ return session_id();
+ }
+
+ return NULL;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * __isset()
+ *
+ * @param string $key 'session_id' or a session data key
+ * @return bool
+ */
+ public function __isset($key)
+ {
+ if ($key === 'session_id')
+ {
+ return (session_status() === PHP_SESSION_ACTIVE);
+ }
+
+ return isset($_SESSION[$key]);
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * __set()
+ *
+ * @param string $key Session data key
+ * @param mixed $value Session data value
+ * @return void
+ */
+ public function __set($key, $value)
+ {
+ $_SESSION[$key] = $value;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Session destroy
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @return void
+ */
+ public function sess_destroy()
+ {
+ session_destroy();
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Session regenerate
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @param bool $destroy Destroy old session data flag
+ * @return void
+ */
+ public function sess_regenerate($destroy = FALSE)
+ {
+ $_SESSION['__ci_last_regenerate'] = time();
+ session_regenerate_id($destroy);
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Get userdata reference
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @returns array
+ */
+ public function &get_userdata()
+ {
+ return $_SESSION;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Userdata (fetch)
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @param string $key Session data key
+ * @return mixed Session data value or NULL if not found
+ */
+ public function userdata($key = NULL)
+ {
+ if (isset($key))
+ {
+ return isset($_SESSION[$key]) ? $_SESSION[$key] : NULL;
+ }
+ elseif (empty($_SESSION))
+ {
+ return array();
+ }
+
+ $userdata = array();
+ $_exclude = array_merge(
+ array('__ci_vars'),
+ $this->get_flash_keys(),
+ $this->get_temp_keys()
+ );
+
+ foreach (array_keys($_SESSION) as $key)
+ {
+ if ( ! in_array($key, $_exclude, TRUE))
+ {
+ $userdata[$key] = $_SESSION[$key];
+ }
+ }
+
+ return $userdata;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Set userdata
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @param mixed $data Session data key or an associative array
+ * @param mixed $value Value to store
+ * @return void
+ */
+ public function set_userdata($data, $value = NULL)
+ {
+ if (is_array($data))
+ {
+ foreach ($data as $key => &$value)
+ {
+ $_SESSION[$key] = $value;
+ }
+
+ return;
+ }
+
+ $_SESSION[$data] = $value;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Unset userdata
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @param mixed $key Session data key(s)
+ * @return void
+ */
+ public function unset_userdata($key)
+ {
+ if (is_array($key))
+ {
+ foreach ($key as $k)
+ {
+ unset($_SESSION[$k]);
+ }
+
+ return;
+ }
+
+ unset($_SESSION[$key]);
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * All userdata (fetch)
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @return array $_SESSION, excluding flash data items
+ */
+ public function all_userdata()
+ {
+ return $this->userdata();
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Has userdata
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @param string $key Session data key
+ * @return bool
+ */
+ public function has_userdata($key)
+ {
+ return isset($_SESSION[$key]);
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Flashdata (fetch)
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @param string $key Session data key
+ * @return mixed Session data value or NULL if not found
+ */
+ public function flashdata($key = NULL)
+ {
+ if (isset($key))
+ {
+ return (isset($_SESSION['__ci_vars'], $_SESSION['__ci_vars'][$key], $_SESSION[$key]) && ! is_int($_SESSION['__ci_vars'][$key]))
+ ? $_SESSION[$key]
+ : NULL;
+ }
+
+ $flashdata = array();
+
+ if ( ! empty($_SESSION['__ci_vars']))
+ {
+ foreach ($_SESSION['__ci_vars'] as $key => &$value)
+ {
+ is_int($value) OR $flashdata[$key] = $_SESSION[$key];
+ }
+ }
+
+ return $flashdata;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Set flashdata
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @param mixed $data Session data key or an associative array
+ * @param mixed $value Value to store
+ * @return void
+ */
+ public function set_flashdata($data, $value = NULL)
+ {
+ $this->set_userdata($data, $value);
+ $this->mark_as_flash(is_array($data) ? array_keys($data) : $data);
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Keep flashdata
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @param mixed $key Session data key(s)
+ * @return void
+ */
+ public function keep_flashdata($key)
+ {
+ $this->mark_as_flash($key);
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Temp data (fetch)
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @param string $key Session data key
+ * @return mixed Session data value or NULL if not found
+ */
+ public function tempdata($key = NULL)
+ {
+ if (isset($key))
+ {
+ return (isset($_SESSION['__ci_vars'], $_SESSION['__ci_vars'][$key], $_SESSION[$key]) && is_int($_SESSION['__ci_vars'][$key]))
+ ? $_SESSION[$key]
+ : NULL;
+ }
+
+ $tempdata = array();
+
+ if ( ! empty($_SESSION['__ci_vars']))
+ {
+ foreach ($_SESSION['__ci_vars'] as $key => &$value)
+ {
+ is_int($value) && $tempdata[$key] = $_SESSION[$key];
+ }
+ }
+
+ return $tempdata;
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Set tempdata
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @param mixed $data Session data key or an associative array of items
+ * @param mixed $value Value to store
+ * @param int $ttl Time-to-live in seconds
+ * @return void
+ */
+ public function set_tempdata($data, $value = NULL, $ttl = 300)
+ {
+ $this->set_userdata($data, $value);
+ $this->mark_as_temp(is_array($data) ? array_keys($data) : $data, $ttl);
+ }
+
+ // ------------------------------------------------------------------------
+
+ /**
+ * Unset tempdata
+ *
+ * Legacy CI_Session compatibility method
+ *
+ * @param mixed $data Session data key(s)
+ * @return void
+ */
+ public function unset_tempdata($key)
+ {
+ $this->unmark_temp($key);
+ }
+
+}