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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 - 2019, 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 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
* @license https://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) : $str;
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('random_string'))
{
/**
* Create a "Random" String
*
* @param string type of random string. basic, alpha, alnum, numeric, nozero, unique, md5, encrypt and sha1
* @param int number of characters
* @return string
*/
function random_string($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) : '';
}
}