forked from pgaultier/guid
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Guid.php
177 lines (151 loc) · 4.44 KB
/
Guid.php
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
<?php
/**
* Guid.php
*
* PHP version 5.3+
*
* @author Philippe Gaultier <pgaultier@sweelix.net>
* @copyright 2010-2014 Sweelix
* @license http://www.sweelix.net/license license
* @version 1.0.0
* @link http://www.sweelix.net
* @category guid
* @package sweelix.guid
*/
namespace guid;
/**
* Simple guid generator.
* A lot of code as been borrowed around the web.
*
* <code>
* // generate a v4 guid
* $guid = Guid::v4();
* </code>
*
*
* @author Philippe Gaultier <pgaultier@sweelix.net>
* @copyright 2010-2014 Sweelix
* @license http://www.sweelix.net/license license
* @version 1.0.0
* @link http://www.sweelix.net
* @category guid
* @package sweelix.guid
*/
class Guid {
/**
* Generate V3 guid
*
* @param string $namespace guid format : xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
* @param string $name name to encode in guid format
*
* @return boolean|string
* @since 1.0.0
*/
public static function v3($namespace, $name) {
$result = false;
if(static::isValid($namespace) === true) {
// Get hexadecimal components of namespace
$nhex = str_replace(array('-','{','}'), '', $namespace);
// Binary Value
$nstr = '';
// Convert Namespace UUID to bits
for($i = 0; $i < strlen($nhex); $i+=2) {
$nstr .= chr(hexdec($nhex[$i].$nhex[$i+1]));
}
// Calculate hash value
$hash = md5($nstr . $name);
$result = sprintf('%08s-%04s-%04x-%04x-%12s',
// 32 bits for "time_low"
substr($hash, 0, 8),
// 16 bits for "time_mid"
substr($hash, 8, 4),
// 16 bits for "time_hi_and_version",
// four most significant bits holds version number 3
(hexdec(substr($hash, 12, 4)) & 0x0fff) | 0x3000,
// 16 bits, 8 bits for "clk_seq_hi_res",
// 8 bits for "clk_seq_low",
// two most significant bits holds zero and one for variant DCE1.1
(hexdec(substr($hash, 16, 4)) & 0x3fff) | 0x8000,
// 48 bits for "node"
substr($hash, 20, 12)
);
}
return $result;
}
/**
* Generate V4 guid
*
* @return string
* @since 1.0.0
*/
public static function v4() {
return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
// 32 bits for "time_low"
mt_rand(0, 0xffff), mt_rand(0, 0xffff),
// 16 bits for "time_mid"
mt_rand(0, 0xffff),
// 16 bits for "time_hi_and_version",
// four most significant bits holds version number 4
mt_rand(0, 0x0fff) | 0x4000,
// 16 bits, 8 bits for "clk_seq_hi_res",
// 8 bits for "clk_seq_low",
// two most significant bits holds zero and one for variant DCE1.1
mt_rand(0, 0x3fff) | 0x8000,
// 48 bits for "node"
mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
);
}
/**
* Generate V5 guid
*
* @param string $namespace guid format : xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
* @param string $name name to encode in guid format
*
* @return boolean|string
* @since 1.0.0
*/
public static function v5($namespace, $name) {
if(!static::isValid($namespace)) return false;
$result = false;
if(static::isValid($namespace) === true) {
// Get hexadecimal components of namespace
$nhex = str_replace(array('-','{','}'), '', $namespace);
// Binary Value
$nstr = '';
// Convert Namespace UUID to bits
for($i = 0; $i < strlen($nhex); $i+=2) {
$nstr .= chr(hexdec($nhex[$i].$nhex[$i+1]));
}
// Calculate hash value
$hash = sha1($nstr . $name);
$result = sprintf('%08s-%04s-%04x-%04x-%12s',
// 32 bits for "time_low"
substr($hash, 0, 8),
// 16 bits for "time_mid"
substr($hash, 8, 4),
// 16 bits for "time_hi_and_version",
// four most significant bits holds version number 5
(hexdec(substr($hash, 12, 4)) & 0x0fff) | 0x5000,
// 16 bits, 8 bits for "clk_seq_hi_res",
// 8 bits for "clk_seq_low",
// two most significant bits holds zero and one for variant DCE1.1
(hexdec(substr($hash, 16, 4)) & 0x3fff) | 0x8000,
// 48 bits for "node"
substr($hash, 20, 12)
);
}
return $result;
}
/**
* Check if selected guid is valid
*
* @param ustring $uuid guid to check
*
* @return boolean
* @since 1.0.0
*/
public static function isValid($uuid) {
return (preg_match('/^\{?[0-9a-f]{8}\-?[0-9a-f]{4}\-?[0-9a-f]{4}\-?'.
'[0-9a-f]{4}\-?[0-9a-f]{12}\}?$/i', $uuid) === 1);
}
}