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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) 2019 - 2022, CodeIgniter Foundation
*
* 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/)
* @copyright Copyright (c) 2019 - 2022, CodeIgniter Foundation (https://codeigniter.com/)
* @license https://opensource.org/licenses/MIT MIT License
* @link https://codeigniter.com
* @since Version 3.0.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* PHP ext/mbstring compatibility package
*
* @package CodeIgniter
* @subpackage CodeIgniter
* @category Compatibility
* @author Andrey Andreev
* @link https://codeigniter.com/userguide3/
* @link https://secure.php.net/mbstring
*/
// ------------------------------------------------------------------------
if (MB_ENABLED === TRUE)
{
return;
}
// ------------------------------------------------------------------------
if ( ! function_exists('mb_strlen'))
{
/**
* mb_strlen()
*
* WARNING: This function WILL fall-back to strlen()
* if iconv is not available!
*
* @link http://php.net/mb_strlen
* @param string $str
* @param string $encoding
* @return int
*/
function mb_strlen($str, $encoding = NULL)
{
if (ICONV_ENABLED === TRUE)
{
return iconv_strlen($str, isset($encoding) ? $encoding : config_item('charset'));
}
log_message('debug', 'Compatibility (mbstring): iconv_strlen() is not available, falling back to strlen().');
return strlen($str);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('mb_strpos'))
{
/**
* mb_strpos()
*
* WARNING: This function WILL fall-back to strpos()
* if iconv is not available!
*
* @link http://php.net/mb_strpos
* @param string $haystack
* @param string $needle
* @param int $offset
* @param string $encoding
* @return mixed
*/
function mb_strpos($haystack, $needle, $offset = 0, $encoding = NULL)
{
if (ICONV_ENABLED === TRUE)
{
return iconv_strpos($haystack, $needle, $offset, isset($encoding) ? $encoding : config_item('charset'));
}
log_message('debug', 'Compatibility (mbstring): iconv_strpos() is not available, falling back to strpos().');
return strpos($haystack, $needle, $offset);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('mb_substr'))
{
/**
* mb_substr()
*
* WARNING: This function WILL fall-back to substr()
* if iconv is not available.
*
* @link http://php.net/mb_substr
* @param string $str
* @param int $start
* @param int $length
* @param string $encoding
* @return string
*/
function mb_substr($str, $start, $length = NULL, $encoding = NULL)
{
if (ICONV_ENABLED === TRUE)
{
isset($encoding) OR $encoding = config_item('charset');
return iconv_substr(
$str,
$start,
isset($length) ? $length : iconv_strlen($str, $encoding), // NULL doesn't work
$encoding
);
}
log_message('debug', 'Compatibility (mbstring): iconv_substr() is not available, falling back to substr().');
return isset($length)
? substr($str, $start, $length)
: substr($str, $start);
}
}
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