Merge CodeIgniter 3 support

1 files changed, 191 insertions, 0 deletions

diff --git a/system/libraries/Session/Session_driver.php b/system/libraries/Session/Session_driver.php
new file mode 100644
index 000000000..f32f14ae0
--- /dev/null
+++ b/system/libraries/Session/Session_driver.php
@@ -0,0 +1,191 @@
+<?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 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * CodeIgniter Session Driver Class
+ *
+ * @package	CodeIgniter
+ * @subpackage	Libraries
+ * @category	Sessions
+ * @author	Andrey Andreev
+ * @link	https://codeigniter.com/user_guide/libraries/sessions.html
+ */
+abstract class CI_Session_driver implements SessionHandlerInterface {
+
+	protected $_config;
+
+	/**
+	 * Data fingerprint
+	 *
+	 * @var	bool
+	 */
+	protected $_fingerprint;
+
+	/**
+	 * Lock placeholder
+	 *
+	 * @var	mixed
+	 */
+	protected $_lock = FALSE;
+
+	/**
+	 * Read session ID
+	 *
+	 * Used to detect session_regenerate_id() calls because PHP only calls
+	 * write() after regenerating the ID.
+	 *
+	 * @var	string
+	 */
+	protected $_session_id;
+
+	/**
+	 * Success and failure return values
+	 *
+	 * Necessary due to a bug in all PHP 5 versions where return values
+	 * from userspace handlers are not handled properly. PHP 7 fixes the
+	 * bug, so we need to return different values depending on the version.
+	 *
+	 * @see	https://wiki.php.net/rfc/session.user.return-value
+	 * @var	mixed
+	 */
+	protected $_success, $_failure;
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Class constructor
+	 *
+	 * @param	array	$params	Configuration parameters
+	 * @return	void
+	 */
+	public function __construct(&$params)
+	{
+		$this->_config =& $params;
+
+		if (is_php('7'))
+		{
+			$this->_success = TRUE;
+			$this->_failure = FALSE;
+		}
+		else
+		{
+			$this->_success = 0;
+			$this->_failure = -1;
+		}
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Cookie destroy
+	 *
+	 * Internal method to force removal of a cookie by the client
+	 * when session_destroy() is called.
+	 *
+	 * @return	bool
+	 */
+	protected function _cookie_destroy()
+	{
+		return setcookie(
+			$this->_config['cookie_name'],
+			NULL,
+			1,
+			$this->_config['cookie_path'],
+			$this->_config['cookie_domain'],
+			$this->_config['cookie_secure'],
+			TRUE
+		);
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Get lock
+	 *
+	 * A dummy method allowing drivers with no locking functionality
+	 * (databases other than PostgreSQL and MySQL) to act as if they
+	 * do acquire a lock.
+	 *
+	 * @param	string	$session_id
+	 * @return	bool
+	 */
+	protected function _get_lock($session_id)
+	{
+		$this->_lock = TRUE;
+		return TRUE;
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Release lock
+	 *
+	 * @return	bool
+	 */
+	protected function _release_lock()
+	{
+		if ($this->_lock)
+		{
+			$this->_lock = FALSE;
+		}
+
+		return TRUE;
+	}
+
+	// ------------------------------------------------------------------------
+
+	/**
+	 * Fail
+	 *
+	 * Drivers other than the 'files' one don't (need to) use the
+	 * session.save_path INI setting, but that leads to confusing
+	 * error messages emitted by PHP when open() or write() fail,
+	 * as the message contains session.save_path ...
+	 * To work around the problem, the drivers will call this method
+	 * so that the INI is set just in time for the error message to
+	 * be properly generated.
+	 *
+	 * @return	mixed
+	 */
+	protected function _fail()
+	{
+		ini_set('session.save_path', config_item('sess_save_path'));
+		return $this->_failure;
+	}
+}