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 *
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 *
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 * An open source application development framework for PHP
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 * An open source application development framework for PHP
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 *
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 *
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 * This content is released under the MIT License (MIT)
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 * This content is released under the MIT License (MIT)
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 *
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 *
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 * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
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 * Copyright (c) 2014 - 2018, British Columbia Institute of Technology
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 *
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * of this software and associated documentation files (the "Software"), to deal
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 * in the Software without restriction, including without limitation the rights
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 * in the Software without restriction, including without limitation the rights
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * THE SOFTWARE.
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 * THE SOFTWARE.
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 *
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 *
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 * @package	CodeIgniter
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 * @package	CodeIgniter
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 * @author	EllisLab Dev Team
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 * @author	EllisLab Dev Team
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 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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 * @copyright	Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
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 * @copyright	Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/)
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 * @license	http://opensource.org/licenses/MIT	MIT License
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 * @license	http://opensource.org/licenses/MIT	MIT License
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 * @link	https://codeigniter.com
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 * @link	https://codeigniter.com
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 * @since	Version 3.0.0
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 * @since	Version 3.0.0
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 * @filesource
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 * @filesource
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 */
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 */
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		{
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		{
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			log_message('error', 'Session: Memcached server pool is empty.');
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			log_message('error', 'Session: Memcached server pool is empty.');
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			return $this->_fail();
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			return $this->_fail();
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		}
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		}
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		$this->php5_validate_id();
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		return $this->_success;
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		return $this->_success;
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	}
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	}
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	{
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	{
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		// Not necessary, Memcached takes care of that.
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		// Not necessary, Memcached takes care of that.
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		return $this->_success;
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		return $this->_success;
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	}
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	}
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	// --------------------------------------------------------------------
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	/**
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	 * Validate ID
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	 *
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	 * Checks whether a session ID record exists server-side,
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	 * to enforce session.use_strict_mode.
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	 *
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	 * @param	string	$id
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	 * @return	bool
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	 */
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	public function validateId($id)
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	{
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		$this->_memcached-get($this->_key_prefix.$id);
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		return ($this->_memcached->getResultCode() === Memcached::RES_SUCCESS);
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	}
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	// ------------------------------------------------------------------------
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	// ------------------------------------------------------------------------
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	/**
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	/**
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			{
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			{
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				return ($this->_memcached->getResultCode() === Memcached::RES_NOTFOUND)
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				return ($this->_memcached->getResultCode() === Memcached::RES_NOTFOUND)
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					? $this->_memcached->add($this->_lock_key, time(), 300)
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					? $this->_memcached->add($this->_lock_key, time(), 300)
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					: FALSE;
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					: FALSE;
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			}
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			}
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			return TRUE;
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		}
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		}
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		// 30 attempts to obtain a lock, in case another request already has it
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		// 30 attempts to obtain a lock, in case another request already has it
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		$lock_key = $this->_key_prefix.$session_id.':lock';
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		$lock_key = $this->_key_prefix.$session_id.':lock';