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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
<?php
/**
* Random_* Compatibility Library
* for using the new PHP 7 random_* API in PHP 5 projects
*
* The MIT License (MIT)
*
* Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
*
* 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.
*/
if (!is_callable('RandomCompat_strlen')) {
if (
defined('MB_OVERLOAD_STRING') &&
ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING
) {
/**
* strlen() implementation that isn't brittle to mbstring.func_overload
*
* This version uses mb_strlen() in '8bit' mode to treat strings as raw
* binary rather than UTF-8, ISO-8859-1, etc
*
* @param string $binary_string
*
* @throws TypeError
*
* @return int
*/
function RandomCompat_strlen($binary_string)
{
if (!is_string($binary_string)) {
throw new TypeError(
'RandomCompat_strlen() expects a string'
);
}
return (int) mb_strlen($binary_string, '8bit');
}
} else {
/**
* strlen() implementation that isn't brittle to mbstring.func_overload
*
* This version just used the default strlen()
*
* @param string $binary_string
*
* @throws TypeError
*
* @return int
*/
function RandomCompat_strlen($binary_string)
{
if (!is_string($binary_string)) {
throw new TypeError(
'RandomCompat_strlen() expects a string'
);
}
return (int) strlen($binary_string);
}
}
}
if (!is_callable('RandomCompat_substr')) {
if (
defined('MB_OVERLOAD_STRING')
&&
ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING
) {
/**
* substr() implementation that isn't brittle to mbstring.func_overload
*
* This version uses mb_substr() in '8bit' mode to treat strings as raw
* binary rather than UTF-8, ISO-8859-1, etc
*
* @param string $binary_string
* @param int $start
* @param int $length (optional)
*
* @throws TypeError
*
* @return string
*/
function RandomCompat_substr($binary_string, $start, $length = null)
{
if (!is_string($binary_string)) {
throw new TypeError(
'RandomCompat_substr(): First argument should be a string'
);
}
if (!is_int($start)) {
throw new TypeError(
'RandomCompat_substr(): Second argument should be an integer'
);
}
if ($length === null) {
/**
* mb_substr($str, 0, NULL, '8bit') returns an empty string on
* PHP 5.3, so we have to find the length ourselves.
*/
$length = RandomCompat_strlen($binary_string) - $start;
} elseif (!is_int($length)) {
throw new TypeError(
'RandomCompat_substr(): Third argument should be an integer, or omitted'
);
}
// Consistency with PHP's behavior
if ($start === RandomCompat_strlen($binary_string) && $length === 0) {
return '';
}
if ($start > RandomCompat_strlen($binary_string)) {
return '';
}
return (string) mb_substr($binary_string, $start, $length, '8bit');
}
} else {
/**
* substr() implementation that isn't brittle to mbstring.func_overload
*
* This version just uses the default substr()
*
* @param string $binary_string
* @param int $start
* @param int $length (optional)
*
* @throws TypeError
*
* @return string
*/
function RandomCompat_substr($binary_string, $start, $length = null)
{
if (!is_string($binary_string)) {
throw new TypeError(
'RandomCompat_substr(): First argument should be a string'
);
}
if (!is_int($start)) {
throw new TypeError(
'RandomCompat_substr(): Second argument should be an integer'
);
}
if ($length !== null) {
if (!is_int($length)) {
throw new TypeError(
'RandomCompat_substr(): Third argument should be an integer, or omitted'
);
}
return (string) substr($binary_string, $start, $length);
}
return (string) substr($binary_string, $start);
}
}
}
|
