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UUID.php
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<?php
declare
(
strict_types
=
1
);
namespace
Keruald\OmniTools\Strings
;
class
UUID
{
/**
* @return string A RFC 4122 compliant v4 UUID
*/
public
static
function
UUIDv4
()
:
string
{
// Code by Andrew Moore
// See http://php.net/manual/en/function.uniqid.php#94959
// https://www.ietf.org/rfc/rfc4122.txt
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
)
);
}
}
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UUID.php (1 KB)
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