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<?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 1.0.0

 * @filesource

 */

defined('BASEPATH') OR exit('No direct script access allowed');

/**

 * CodeIgniter String Helpers

 *

 * @package		CodeIgniter

 * @subpackage	Helpers

 * @category	Helpers

 * @author		EllisLab Dev Team

 * @link		https://codeigniter.com/user_guide/helpers/string_helper.html

 */

// ------------------------------------------------------------------------

if ( ! function_exists('trim_slashes'))

{

	/**

	 * Trim Slashes

	 *

	 * Removes any leading/trailing slashes from a string:

	 *

	 * /this/that/theother/

	 *

	 * becomes:

	 *

	 * this/that/theother

	 *

	 * @todo	Remove in version 3.1+.

	 * @deprecated	3.0.0	This is just an alias for PHP's native trim()

	 *

	 * @param	string

	 * @return	string

	 */

	function trim_slashes($str)

	{

		return trim($str, '/');

	}

}

// ------------------------------------------------------------------------

if ( ! function_exists('strip_slashes'))

{

	/**

	 * Strip Slashes

	 *

	 * Removes slashes contained in a string or in an array

	 *

	 * @param	mixed	string or array

	 * @return	mixed	string or array

	 */

	function strip_slashes($str)

	{

		if ( ! is_array($str))

		{

			return stripslashes($str);

		}

		foreach ($str as $key => $val)

		{

			$str[$key] = strip_slashes($val);

		}

		return $str;

	}

}

// ------------------------------------------------------------------------

if ( ! function_exists('strip_quotes'))

{

	/**

	 * Strip Quotes

	 *

	 * Removes single and double quotes from a string

	 *

	 * @param	string

	 * @return	string

	 */

	function strip_quotes($str)

	{

		return str_replace(array('"', "'"), '', $str);

	}

}

// ------------------------------------------------------------------------

if ( ! function_exists('quotes_to_entities'))

{

	/**

	 * Quotes to Entities

	 *

	 * Converts single and double quotes to entities

	 *

	 * @param	string

	 * @return	string

	 */

	function quotes_to_entities($str)

	{

		return str_replace(array("\'","\"","'",'"'), array("'",""","'","""), $str);

	}

}

// ------------------------------------------------------------------------

if ( ! function_exists('reduce_double_slashes'))

{

	/**

	 * Reduce Double Slashes

	 *

	 * Converts double slashes in a string to a single slash,

	 * except those found in http://

	 *

	 * http://www.some-site.com//index.php

	 *

	 * becomes:

	 *

	 * http://www.some-site.com/index.php

	 *

	 * @param	string

	 * @return	string

	 */

	function reduce_double_slashes($str)

	{

		return preg_replace('#(^|[^:])//+#', '\\1/', $str);

	}

}

// ------------------------------------------------------------------------

if ( ! function_exists('reduce_multiples'))

{

	/**

	 * Reduce Multiples

	 *

	 * Reduces multiple instances of a particular character.  Example:

	 *

	 * Fred, Bill,, Joe, Jimmy

	 *

	 * becomes:

	 *

	 * Fred, Bill, Joe, Jimmy

	 *

	 * @param	string

	 * @param	string	the character you wish to reduce

	 * @param	bool	TRUE/FALSE - whether to trim the character from the beginning/end

	 * @return	string

	 */

	function reduce_multiples($str, $character = ',', $trim = FALSE)

	{

		$str = preg_replace('#'.preg_quote($character, '#').'{2,}#', $character, $str);

		return ($trim === TRUE) ? trim($str, $character) : $str;

	}

}

// ------------------------------------------------------------------------

if ( ! function_exists('random_string'))

{

	/**

	 * Create a Random String

	 *

	 * Useful for generating passwords or hashes.

	 *

	 * @param	string	type of random string.  basic, alpha, alnum, numeric, nozero, unique, md5, encrypt and sha1

	 * @param	int	number of characters

	 * @return	string

	 */

	function random_string($type = 'alnum', $len = 8)

	{

		switch ($type)

		{

			case 'basic':

				return mt_rand();

			case 'alnum':

			case 'numeric':

			case 'nozero':

			case 'alpha':

				switch ($type)

				{

					case 'alpha':

						$pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

						break;

					case 'alnum':

						$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

						break;

					case 'numeric':

						$pool = '0123456789';

						break;

					case 'nozero':

						$pool = '123456789';

						break;

				}

				return substr(str_shuffle(str_repeat($pool, ceil($len / strlen($pool)))), 0, $len);

			case 'unique': // todo: remove in 3.1+

			case 'md5':

				return md5(uniqid(mt_rand()));

			case 'encrypt': // todo: remove in 3.1+

			case 'sha1':

				return sha1(uniqid(mt_rand(), TRUE));

		}

	}

}

// ------------------------------------------------------------------------

if ( ! function_exists('increment_string'))

{

	/**

	 * Add's _1 to a string or increment the ending number to allow _2, _3, etc

	 *

	 * @param	string	required

	 * @param	string	What should the duplicate number be appended with

	 * @param	string	Which number should be used for the first dupe increment

	 * @return	string

	 */

	function increment_string($str, $separator = '_', $first = 1)

	{

		preg_match('/(.+)'.preg_quote($separator, '/').'([0-9]+)$/', $str, $match);

		return isset($match[2]) ? $match[1].$separator.($match[2] + 1) : $str.$separator.$first;

	}

}

// ------------------------------------------------------------------------

if ( ! function_exists('alternator'))

{

	/**

	 * Alternator

	 *

	 * Allows strings to be alternated. See docs...

	 *

	 * @param	string (as many parameters as needed)

	 * @return	string

	 */

	function alternator()

	{

		static $i;

		if (func_num_args() === 0)

		{

			$i = 0;

			return '';

		}

		$args = func_get_args();

		return $args[($i++ % count($args))];

	}

}

// ------------------------------------------------------------------------

if ( ! function_exists('repeater'))

{

	/**

	 * Repeater function

	 *

	 * @todo	Remove in version 3.1+.

	 * @deprecated	3.0.0	This is just an alias for PHP's native str_repeat()

	 *

	 * @param	string	$data	String to repeat

	 * @param	int	$num	Number of repeats

	 * @return	string

	 */

	function repeater($data, $num = 1)

	{

		return ($num > 0) ? str_repeat($data, $num) : '';

	}

}