<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/**

 * CodeIgniter

 *

 * An open source application development framework for PHP 5.1.6 or newer

 *

 * @package		CodeIgniter

 * @author		ExpressionEngine Dev Team

 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.

 * @license		http://codeigniter.com/user_guide/license.html

 * @link		http://codeigniter.com

 * @since		Version 1.0

 * @filesource

 */



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



/**

 * CodeIgniter String Helpers

 *

 * @package		CodeIgniter

 * @subpackage	Helpers

 * @category	Helpers

 * @author		ExpressionEngine Dev Team

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

 */



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



/**

 * Trim Slashes

 *

 * Removes any leading/trailing slashes from a string:

 *

 * /this/that/theother/

 *

 * becomes:

 *

 * this/that/theother

 *

 * @access	public

 * @param	string

 * @return	string

 */

if ( ! function_exists('trim_slashes'))

{

	function trim_slashes($str)

	{

		return trim($str, '/');

	}

}



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



/**

 * Strip Slashes

 *

 * Removes slashes contained in a string or in an array

 *

 * @access	public

 * @param	mixed	string or array

 * @return	mixed	string or array

 */

if ( ! function_exists('strip_slashes'))

{

	function strip_slashes($str)

	{

		if (is_array($str))

		{

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

			{

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

			}

		}

		else

		{

			$str = stripslashes($str);

		}



		return $str;

	}

}



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



/**

 * Strip Quotes

 *

 * Removes single and double quotes from a string

 *

 * @access	public

 * @param	string

 * @return	string

 */

if ( ! function_exists('strip_quotes'))

{

	function strip_quotes($str)

	{

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

	}

}



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



/**

 * Quotes to Entities

 *

 * Converts single and double quotes to entities

 *

 * @access	public

 * @param	string

 * @return	string

 */

if ( ! function_exists('quotes_to_entities'))

{

	function quotes_to_entities($str)

	{

		return str_replace(array("\'","\"","'",'"'), array("&#39;","&quot;","&#39;","&quot;"), $str);

	}

}



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



/**

 * 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

 *

 * @access	public

 * @param	string

 * @return	string

 */

if ( ! function_exists('reduce_double_slashes'))

{

	function reduce_double_slashes($str)

	{

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

	}

}



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



/**

 * Reduce Multiples

 *

 * Reduces multiple instances of a particular character.  Example:

 *

 * Fred, Bill,, Joe, Jimmy

 *

 * becomes:

 *

 * Fred, Bill, Joe, Jimmy

 *

 * @access	public

 * @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

 */

if ( ! function_exists('reduce_multiples'))

{

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

	{

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



		if ($trim === TRUE)

		{

			$str = trim($str, $character);

		}



		return $str;

	}

}



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



/**

 * Create a Random String

 *

 * Useful for generating passwords or hashes.

 *

 * @access	public

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

 * @param	integer	number of characters

 * @return	string

 */

if ( ! function_exists('random_string'))

{

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

	{

		switch($type)

		{

			case 'basic'	: return mt_rand();

				break;

			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;

					}



					$str = '';

					for ($i=0; $i < $len; $i++)

					{

						$str .= substr($pool, mt_rand(0, strlen($pool) -1), 1);

					}

					return $str;

				break;

			case 'unique'	:

			case 'md5'		:



						return md5(uniqid(mt_rand()));

				break;

			case 'encrypt'	:

			case 'sha1'	:



						$CI =& get_instance();

						$CI->load->helper('security');



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

				break;

		}

	}

}



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



/**

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

 *

 * @param   string  $str  required

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

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

 * @return  string

 */

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

{

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



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

}



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



/**

 * Alternator

 *

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

 *

 * @access	public

 * @param	string (as many parameters as needed)

 * @return	string

 */

if ( ! function_exists('alternator'))

{

	function alternator()

	{

		static $i;



		if (func_num_args() == 0)

		{

			$i = 0;

			return '';

		}

		$args = func_get_args();

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

	}

}



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



/**

 * Repeater function

 *

 * @access	public

 * @param	string

 * @param	integer	number of repeats

 * @return	string

 */

if ( ! function_exists('repeater'))

{

	function repeater($data, $num = 1)

	{

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

	}

}





/* End of file string_helper.php */

/* Location: ./system/helpers/string_helper.php */