1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
<?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 2.0.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* Utf8 Class
*
* Provides support for UTF-8 environments
*
* @package CodeIgniter
* @subpackage Libraries
* @category UTF-8
* @author EllisLab Dev Team
* @link https://codeigniter.com/user_guide/libraries/utf8.html
*/
class CI_Utf8 {
/**
* Class constructor
*
* Determines if UTF-8 support is to be enabled.
*
* @return void
*/
public function __construct()
{
if (
defined('PREG_BAD_UTF8_ERROR') // PCRE must support UTF-8
&& (ICONV_ENABLED === TRUE OR MB_ENABLED === TRUE) // iconv or mbstring must be installed
&& strtoupper(config_item('charset')) === 'UTF-8' // Application charset must be UTF-8
)
{
define('UTF8_ENABLED', TRUE);
log_message('debug', 'UTF-8 Support Enabled');
}
else
{
define('UTF8_ENABLED', FALSE);
log_message('debug', 'UTF-8 Support Disabled');
}
log_message('info', 'Utf8 Class Initialized');
}
// --------------------------------------------------------------------
/**
* Clean UTF-8 strings
*
* Ensures strings contain only valid UTF-8 characters.
*
* @param string $str String to clean
* @return string
*/
public function clean_string($str)
{
if ($this->is_ascii($str) === FALSE)
{
if (MB_ENABLED)
{
$str = mb_convert_encoding($str, 'UTF-8', 'UTF-8');
}
elseif (ICONV_ENABLED)
{
$str = @iconv('UTF-8', 'UTF-8//IGNORE', $str);
}
}
return $str;
}
// --------------------------------------------------------------------
/**
* Remove ASCII control characters
*
* Removes all ASCII control characters except horizontal tabs,
* line feeds, and carriage returns, as all others can cause
* problems in XML.
*
* @param string $str String to clean
* @return string
*/
public function safe_ascii_for_xml($str)
{
return remove_invisible_characters($str, FALSE);
}
// --------------------------------------------------------------------
/**
* Convert to UTF-8
*
* Attempts to convert a string to UTF-8.
*
* @param string $str Input string
* @param string $encoding Input encoding
* @return string $str encoded in UTF-8 or FALSE on failure
*/
public function convert_to_utf8($str, $encoding)
{
if (MB_ENABLED)
{
return mb_convert_encoding($str, 'UTF-8', $encoding);
}
elseif (ICONV_ENABLED)
{
return @iconv($encoding, 'UTF-8', $str);
}
return FALSE;
}
// --------------------------------------------------------------------
/**
* Is ASCII?
*
* Tests if a string is standard 7-bit ASCII or not.
*
* @param string $str String to check
* @return bool
*/
public function is_ascii($str)
{
return (preg_match('/[^\x00-\x7F]/S', $str) === 0);
}
}
|
