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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 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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	 */
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	 */
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	public function valid_email($str)
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	public function valid_email($str)
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	{
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	{
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		if (function_exists('idn_to_ascii') && preg_match('#\A([^@]+)@(.+)\z#', $str, $matches))
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		if (function_exists('idn_to_ascii') && preg_match('#\A([^@]+)@(.+)\z#', $str, $matches))
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		{
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		{
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			$domain = defined('INTL_IDNA_VARIANT_UTS46')
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				? idn_to_ascii($matches[2], 0, INTL_IDNA_VARIANT_UTS46)
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				: idn_to_ascii($matches[2]);
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			if ($domain !== FALSE)
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			{
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			$str = $matches[1].'@'.idn_to_ascii($matches[2]);
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				$str = $matches[1].'@'.$domain;
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			}
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		}
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		}
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		return (bool) filter_var($str, FILTER_VALIDATE_EMAIL);
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		return (bool) filter_var($str, FILTER_VALIDATE_EMAIL);