146 lines
4.8 KiB
PHP
146 lines
4.8 KiB
PHP
<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2019 - 2022, CodeIgniter Foundation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @copyright Copyright (c) 2019 - 2022, CodeIgniter Foundation (https://codeigniter.com/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 3.0.0
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* @filesource
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*/
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defined('BASEPATH') or exit('No direct script access allowed');
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/**
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* PHP ext/mbstring compatibility package
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*
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* @package CodeIgniter
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* @subpackage CodeIgniter
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* @category Compatibility
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* @author Andrey Andreev
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* @link https://codeigniter.com/userguide3/
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* @link https://secure.php.net/mbstring
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*/
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// ------------------------------------------------------------------------
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if (MB_ENABLED === true) {
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return;
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}
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// ------------------------------------------------------------------------
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if (! function_exists('mb_strlen')) {
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/**
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* mb_strlen()
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*
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* WARNING: This function WILL fall-back to strlen()
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* if iconv is not available!
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*
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* @link http://php.net/mb_strlen
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* @param string $str
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* @param string $encoding
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* @return int
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*/
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function mb_strlen($str, $encoding = null)
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{
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if (ICONV_ENABLED === true) {
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return iconv_strlen($str, isset($encoding) ? $encoding : config_item('charset'));
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}
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log_message('debug', 'Compatibility (mbstring): iconv_strlen() is not available, falling back to strlen().');
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return strlen($str);
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}
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}
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// ------------------------------------------------------------------------
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if (! function_exists('mb_strpos')) {
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/**
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* mb_strpos()
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*
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* WARNING: This function WILL fall-back to strpos()
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* if iconv is not available!
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*
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* @link http://php.net/mb_strpos
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* @param string $haystack
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* @param string $needle
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* @param int $offset
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* @param string $encoding
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* @return mixed
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*/
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function mb_strpos($haystack, $needle, $offset = 0, $encoding = null)
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{
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if (ICONV_ENABLED === true) {
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return iconv_strpos($haystack, $needle, $offset, isset($encoding) ? $encoding : config_item('charset'));
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}
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log_message('debug', 'Compatibility (mbstring): iconv_strpos() is not available, falling back to strpos().');
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return strpos($haystack, $needle, $offset);
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}
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}
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// ------------------------------------------------------------------------
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if (! function_exists('mb_substr')) {
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/**
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* mb_substr()
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*
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* WARNING: This function WILL fall-back to substr()
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* if iconv is not available.
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*
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* @link http://php.net/mb_substr
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* @param string $str
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* @param int $start
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* @param int $length
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* @param string $encoding
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* @return string
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*/
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function mb_substr($str, $start, $length = null, $encoding = null)
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{
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if (ICONV_ENABLED === true) {
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isset($encoding) or $encoding = config_item('charset');
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return iconv_substr(
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$str,
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$start,
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isset($length) ? $length : iconv_strlen($str, $encoding), // NULL doesn't work
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$encoding
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);
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}
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log_message('debug', 'Compatibility (mbstring): iconv_substr() is not available, falling back to substr().');
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return isset($length)
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? substr($str, $start, $length)
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: substr($str, $start);
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}
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}
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