/branches/RP_1073/system/helpers/string_helper.php

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

/**

 * CodeIgniter

 *

 * An open source application development framework for PHP 4.3.2 or newer

 *

 * @package		CodeIgniter

 * @author		Rick Ellis

 * @copyright	Copyright (c) 2006, EllisLab, Inc.

 * @license		http://www.codeignitor.com/user_guide/license.html

 * @link		http://www.codeigniter.com

 * @since		Version 1.0

 * @filesource

 */



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



/**

 * CodeIgniter String Helpers

 *

 * @package		CodeIgniter

 * @subpackage	Helpers

 * @category	Helpers

 * @author		Rick Ellis

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

 */



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



/**

 * Trim Slashes

 *

 * Removes any leading/traling slashes from a string:

 *

 * /this/that/theother/

 *

 * becomes:

 *

 * this/that/theother

 *

 * @access	public

 * @param	string

 * @return	string

 */	

function trim_slashes($str)

{

    return trim($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

 */	

function reduce_double_slashes($str)

{

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

}

	

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



/**

 * Create a Random String

 *

 * Useful for generating passwords or hashes.

 *

 * @access	public

 * @param	string 	type of random string.  Options: alunum, numeric, nozero, unique

 * @param	integer	number of characters

 * @return	string

 */	

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

{					

	switch($type)

	{

		case 'alnum'	:

		case 'numeric'	:

		case 'nozero'	:

		

				switch ($type)

				{

					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' : return md5(uniqid(mt_rand()));

		  break;

	}

}

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



/**

 * Alternator

 *

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

 *

 * @access	public

 * @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))];

}



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



/**

 * Repeater function

 *

 * @access	public

 * @param	string

 * @param	integer	number of repeats

 * @return	string

 */	

function repeater($data, $num = 1)

{

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

} 





?>