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Psr\Clock implementations

This repository provides a couple of Psr\Clock implementations, based on the draft PSR. This currently is not a package, it might become a package when the PSR is accepted.

System time

SystemClock is the most simple Psr\Clock implementation that always will return the current systemtime. It essential replaces new \DateTimeImmuitable().

Changing timezones

TimeZonedClock and its descendants UTCClock and LocalClock are facades for other clock that will convert any clocks output to the desired timezone.

// $utc_clock->now() will always return a DateTimeImmutable in the UTC timezone
$utc_clock = new UTCClock(new SystemClock());

// $my_clock->now() will always return a DateTimeImmutable in the Europe/Amsterdam timezone
$my_clock = new TimeZonedClock(new SystemClock(), new DateTimeZone('Europe/Amsterdam'));

Stuck in time

FixedClock will always return a DateTimeImmutable for the same date and time provided in the constructor.

RepeatableClock will always return a DateTimeImmutable for the same date and time, obtained on the first call to now()

UnixEpochClock will always return a DateTimeImmutable for the UNIX epoch 1970-01-01 00:00:00 UTC.

Controlled clocks

ManualClock allows manual control over the DateTimeImmutable that is returned. It has convenience functions to add or subtract time intervals.

Sequenced clock allow the user to provide a list of DateTimeInterface object that will be returned in sequence. ManuallySequencedClock progresses to the next provided DateTimeImmutable when calling tick. AutomaticallyProgressingClock will progress to the next entry when calling now().

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