Verzeichnisstruktur phpBB-3.2.0
- Veröffentlicht
- 06.01.2017
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byte_safe_strings.php
001 <?php
002 /**
003 * Random_* Compatibility Library
004 * for using the new PHP 7 random_* API in PHP 5 projects
005 *
006 * The MIT License (MIT)
007 *
008 * Copyright (c) 2015 Paragon Initiative Enterprises
009 *
010 * Permission is hereby granted, free of charge, to any person obtaining a copy
011 * of this software and associated documentation files (the "Software"), to deal
012 * in the Software without restriction, including without limitation the rights
013 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
014 * copies of the Software, and to permit persons to whom the Software is
015 * furnished to do so, subject to the following conditions:
016 *
017 * The above copyright notice and this permission notice shall be included in
018 * all copies or substantial portions of the Software.
019 *
020 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
021 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
022 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
023 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
024 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
025 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
026 * SOFTWARE.
027 */
028
029 if (!function_exists('RandomCompat_strlen')) {
030 if (
031 defined('MB_OVERLOAD_STRING') &&
032 ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING
033 ) {
034 /**
035 * strlen() implementation that isn't brittle to mbstring.func_overload
036 *
037 * This version uses mb_strlen() in '8bit' mode to treat strings as raw
038 * binary rather than UTF-8, ISO-8859-1, etc
039 *
040 * @param string $binary_string
041 *
042 * @throws TypeError
043 *
044 * @return int
045 */
046 function RandomCompat_strlen($binary_string)
047 {
048 if (!is_string($binary_string)) {
049 throw new TypeError(
050 'RandomCompat_strlen() expects a string'
051 );
052 }
053
054 return mb_strlen($binary_string, '8bit');
055 }
056
057 } else {
058 /**
059 * strlen() implementation that isn't brittle to mbstring.func_overload
060 *
061 * This version just used the default strlen()
062 *
063 * @param string $binary_string
064 *
065 * @throws TypeError
066 *
067 * @return int
068 */
069 function RandomCompat_strlen($binary_string)
070 {
071 if (!is_string($binary_string)) {
072 throw new TypeError(
073 'RandomCompat_strlen() expects a string'
074 );
075 }
076 return strlen($binary_string);
077 }
078 }
079 }
080
081 if (!function_exists('RandomCompat_substr')) {
082
083 if (
084 defined('MB_OVERLOAD_STRING')
085 &&
086 ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING
087 ) {
088 /**
089 * substr() implementation that isn't brittle to mbstring.func_overload
090 *
091 * This version uses mb_substr() in '8bit' mode to treat strings as raw
092 * binary rather than UTF-8, ISO-8859-1, etc
093 *
094 * @param string $binary_string
095 * @param int $start
096 * @param int $length (optional)
097 *
098 * @throws TypeError
099 *
100 * @return string
101 */
102 function RandomCompat_substr($binary_string, $start, $length = null)
103 {
104 if (!is_string($binary_string)) {
105 throw new TypeError(
106 'RandomCompat_substr(): First argument should be a string'
107 );
108 }
109
110 if (!is_int($start)) {
111 throw new TypeError(
112 'RandomCompat_substr(): Second argument should be an integer'
113 );
114 }
115
116 if ($length === null) {
117 /**
118 * mb_substr($str, 0, NULL, '8bit') returns an empty string on
119 * PHP 5.3, so we have to find the length ourselves.
120 */
121 $length = RandomCompat_strlen($length) - $start;
122 } elseif (!is_int($length)) {
123 throw new TypeError(
124 'RandomCompat_substr(): Third argument should be an integer, or omitted'
125 );
126 }
127
128 return mb_substr($binary_string, $start, $length, '8bit');
129 }
130
131 } else {
132
133 /**
134 * substr() implementation that isn't brittle to mbstring.func_overload
135 *
136 * This version just uses the default substr()
137 *
138 * @param string $binary_string
139 * @param int $start
140 * @param int $length (optional)
141 *
142 * @throws TypeError
143 *
144 * @return string
145 */
146 function RandomCompat_substr($binary_string, $start, $length = null)
147 {
148 if (!is_string($binary_string)) {
149 throw new TypeError(
150 'RandomCompat_substr(): First argument should be a string'
151 );
152 }
153
154 if (!is_int($start)) {
155 throw new TypeError(
156 'RandomCompat_substr(): Second argument should be an integer'
157 );
158 }
159
160 if ($length !== null) {
161 if (!is_int($length)) {
162 throw new TypeError(
163 'RandomCompat_substr(): Third argument should be an integer, or omitted'
164 );
165 }
166
167 return substr($binary_string, $start, $length);
168 }
169
170 return substr($binary_string, $start);
171 }
172 }
173 }
174