php - 如何根据历史时间生成UUID？

Question

我正在使用 https://github.com/ramsey/uuid生成 UUID(基于时间的 v1 UUID)的库。

如何使用历史时间而不是当前时间从该库生成 UUID？

我感觉它与 FixedTimeProvider 类和类似下面的内容有关，但不确定如何让它工作。

$uuidFactory = new \Ramsey\Uuid\UuidFactory();
$uuidFactory->setTimeGenerator(new \Ramsey\Uuid\Generator\DefaultTimeGenerator(
    new \MyVendor\Uuid\NodeProvider(),
    new \MyVendor\Uuid\TimeConverter(),
    new \MyVendor\Uuid\TimeProvider()
));
\Ramsey\Uuid\Uuid::setFactory($uuidFactory);

$uuid = \Ramsey\Uuid\Uuid::uuid1();

Answer 1

这是你如何做到这一点:

$timestamp = strtotime('2017-01-01 12:00:00');
$startTimeProvider = new FixedTimeProvider([
        'sec' => $timestamp,
        'usec' => 0,
    ]);
$startTimeFeatureSet = new FeatureSet();
$startTimeFeatureSet->setTimeProvider($startTimeProvider);
$factory = new UuidFactory($startTimeFeatureSet);
Uuid::setFactory($factory);
echo Uuid::uuid1()->toString();

可以在这里测试生成的UUID的时间戳:https://www.famkruithof.net/uuid/uuidgen