zhishifufei_php/vendor/psr/clock/README.md

PSR Clock

This repository holds the interface for PSR-20.

Note that this is not a clock of its own. It is merely an interface that describes a clock. See the specification for more details.

Installation

composer require psr/clock

Usage

If you need a clock, you can use the interface like this:

<?php

use Psr\Clock\ClockInterface;

class Foo
{
    private ClockInterface $clock;

    public function __construct(ClockInterface $clock)
    {
        $this->clock = $clock;
    }

    public function doSomething()
    {
        /** @var DateTimeImmutable $currentDateAndTime */
        $currentDateAndTime = $this->clock->now();
        // do something useful with that information
    }
}

You can then pick one of the implementations of the interface to get a clock.

If you want to implement the interface, you can require this package and implement Psr\Clock\ClockInterface in your code.

Don't forget to add psr/clock-implementation to your composer.jsons provides-section like this:

{
  "provides": {
    "psr/clock-implementation": "1.0"
  }
}

And please read the specification text for details on the interface.