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不可变PHP类，用于存储时间段，而不依赖于日期。

内部使用 DateInterval 和 DateTime 来进行实际操作。

安装

使用composer安装

$ composer require p-sam/duration-immutable

使用方法

实例化

use SP\DurationImmutable\DurationImmutable;

DurationImmutable::fromSeconds(2); // 2s
DurationImmutable::fromSeconds(-30); // - 30s
DurationImmutable::fromSeconds(92, 0.200130); // 1m 32s 200ms 130µs

DurationImmutable::fromPHPDateInterval(new DateInterval('P1DT4H')); // 1d 4H
$refDate = DateTimeImmutable::createFromFormat(DateTimeImmutable::ATOM, '2020-01-10T00:00:00+00:00');
DurationImmutable::fromPHPDateInterval(
    new DateInterval('P1M3D'),
    $refDate
); // 34d

// refer to DateInterval::createFromDateString
// for documentation on accepted formats
DurationImmutable::fromHuman('1 hour - 15 minutes'); // 45m
DurationImmutable::fromHuman('yesterday'); // - 1d 

操作

use SP\DurationImmutable\DurationImmutable;

$duration = DurationImmutable::fromHuman('120 minutes'); // 2h

$duration->abs(); // 2h
$duration->add(DurationImmutable::fromHuman('30 minutes')); // 2h 30m
$duration->sub(DurationImmutable::fromHuman('3 hours + 10 minutes')); // - 1h 10m
$duration->mul(2.5); // 5h
$duration->div(-4); // - 30m

$dateTime = new DateTimeImmutable();
$duration->addTo($dateTime); // now + 2h

$duration->toSeconds(); // 7200
$duration->toIntervalSpec(); // "PT2H"
$duration->toPHPDateInterval(); // DateInterval("PT2H")