UUID - Universally Unique Identifier

Version 7 UUIDs using a Unix timestamp for PHP

Installation

You can install the package via composer:

composer require ghostwriter/uuid

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Usage

Initialize a new Uuid instance with a given UUID string

use Ghostwriter\Uuid\Uuid;

$uuid = new Uuid('0000669c-8deb-7fe7-b9cc-692b216999a3');

echo $uuid->toString(); // 0000669c-8deb-7fe7-b9cc-692b216999a3

Generate a new UUID

echo Uuid::new()->toString(); // 0000669c-8f99-711e-9ed0-72a35c3b6fb3

Generate a new UUID with a specific timestamp

echo Uuid::new(new DateTimeImmutable())->toString(); // 0000669c-8faf-7e4b-9ed9-45c4c2b27f07

Compare UUIDs based on their timestamp

$uuid1 = Uuid::new(new DateTimeImmutable('-1 year'));
$uuid2 = Uuid::new(new DateTimeImmutable('-1 month'));
$uuid3 = Uuid::new(new DateTimeImmutable('-1 week'));
$uuid4 = Uuid::new(new DateTimeImmutable('-1 day'));

assert(0 === $uuid1->compare($uuid1));
assert(-1 === $uuid1->compare($uuid2));
assert(-1 === $uuid1->compare($uuid3));
assert(-1 === $uuid1->compare($uuid4));

assert(1 === $uuid2->compare($uuid1));
assert(0 === $uuid2->compare($uuid2));
assert(-1 === $uuid2->compare($uuid3));
assert(-1 === $uuid2->compare($uuid4));

assert(1 === $uuid3->compare($uuid1));
assert(1 === $uuid3->compare($uuid2));
assert(0 === $uuid3->compare($uuid3));
assert(-1 === $uuid3->compare($uuid4));

assert(1 === $uuid4->compare($uuid1));
assert(1 === $uuid4->compare($uuid2));
assert(1 === $uuid4->compare($uuid3));
assert(0 === $uuid4->compare($uuid4));

/** @var array{0:UuidInterface,1:UuidInterface,2:UuidInterface,3:UuidInterface} $uuids */
$uuids = [$uuid3, $uuid1, $uuid4, $uuid2];

usort($uuids, static fn (UuidInterface $left, UuidInterface $right): int => $left->compare($right));

assert($uuid1->toString() === $uuids[0]->toString());
assert($uuid2->toString() === $uuids[1]->toString());
assert($uuid3->toString() === $uuids[2]->toString());
assert($uuid4->toString() === $uuids[3]->toString());

Credits

• Nathanael Esayeas
• All Contributors

Changelog

Please see CHANGELOG.md for more information on what has changed recently.

License

Please see LICENSE for more information on the license that applies to this project.

Security

Please see SECURITY.md for more information on security disclosure process.