FilesExpand file tree

 master

/

Uuid.php

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

48 lines (37 loc) · 1.09 KB

 master

/

Uuid.php

Top

File metadata and controls

• Code
• Blame

48 lines (37 loc) · 1.09 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

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

<?php

/**

* @file

* Contains \DrupalPatchUtils\Php.

*/

namespace DrupalPatchUtils;

/**

* Generates a UUID v4 using PHP code.

*

* Loosely based on Ruby's UUIDTools generate_random logic.

*

* @see http://uuidtools.rubyforge.org/api/classes/UUIDTools/UUID.html

*/

class Uuid {

/**

* {@inheritdoc}

*/

public static function generate() {

$hex = substr(hash('sha256', microtime() . mt_rand()), 0, 32);

// The field names refer to RFC 4122 section 4.1.2.

$time_low = substr($hex, 0, 8);

$time_mid = substr($hex, 8, 4);

$time_hi_and_version = base_convert(substr($hex, 12, 4), 16, 10);

$time_hi_and_version &= 0x0FFF;

$time_hi_and_version |= (4 << 12);

$clock_seq_hi_and_reserved = base_convert(substr($hex, 16, 4), 16, 10);

$clock_seq_hi_and_reserved &= 0x3F;

$clock_seq_hi_and_reserved |= 0x80;

$clock_seq_low = substr($hex, 20, 2);

$nodes = substr($hex, 20);

$uuid = sprintf('%s-%s-%04x-%02x%02x-%s',

$time_low, $time_mid,

$time_hi_and_version, $clock_seq_hi_and_reserved,

$clock_seq_low, $nodes);

return $uuid;

}

}