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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 - 2018, British Columbia Institute of Technology
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 * Copyright (c) 2014 - 2019, 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 - 2018, British Columbia Institute of Technology (http://bcit.ca/)
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 * @copyright	Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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 * @license	http://opensource.org/licenses/MIT	MIT License
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 * @license	https://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 1.0.0
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 * @since	Version 1.0.0
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 * @filesource
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 * @filesource
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 */
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 */
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defined('BASEPATH') OR exit('No direct script access allowed');
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defined('BASEPATH') OR exit('No direct script access allowed');
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	/**
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	/**
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	 * Database port
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	 * Database port
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	 *
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	 *
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	 * @var	int
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	 * @var	int
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	 */
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	 */
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	public $port			= '';
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	public $port			= NULL;
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	/**
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	/**
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	 * Persistent connection flag
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	 * Persistent connection flag
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	 *
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	 *
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	 * @param	string	$table	Table name
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	 * @param	string	$table	Table name
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	 * @return	array
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	 * @return	array
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	 */
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	 */
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	public function list_fields($table)
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	public function list_fields($table)
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	{
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	{
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		// Is there a cached result?
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		if (isset($this->data_cache['field_names'][$table]))
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		{
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			return $this->data_cache['field_names'][$table];
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		}
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		if (FALSE === ($sql = $this->_list_columns($table)))
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		if (FALSE === ($sql = $this->_list_columns($table)))
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		{
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		{
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			return ($this->db_debug) ? $this->display_error('db_unsupported_function') : FALSE;
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			return ($this->db_debug) ? $this->display_error('db_unsupported_function') : FALSE;
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		}
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		}
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		$query = $this->query($sql);
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		$query = $this->query($sql);
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		$this->data_cache['field_names'][$table] = array();
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		$fields = array();
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		foreach ($query->result_array() as $row)
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		foreach ($query->result_array() as $row)
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		{
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		{
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					// We have no other choice but to just get the first element's key.
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					// We have no other choice but to just get the first element's key.
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					$key = key($row);
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					$key = key($row);
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				}
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				}
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			}
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			}
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			$this->data_cache['field_names'][$table][] = $row[$key];
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			$fields[] = $row[$key];
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		}
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		}
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		return $this->data_cache['field_names'][$table];
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		return $fields;
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	}
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	}