如何在PHP中以ms为单位获取当前时间? [英] How to get current time in ms in PHP?

问题描述

我想得到的就像time()一样，但以毫秒为单位应该是准确的:

What I want to get is the very like time(),but should be accurate in ms:

2010-11-15 21:21:00:987

在PHP中有可能吗?

推荐答案

function udate($format, $utimestamp = null) {
  if (is_null($utimestamp))
    $utimestamp = microtime(true);

  $timestamp = floor($utimestamp);
  $milliseconds = round(($utimestamp - $timestamp) * 1000000);

  return date(preg_replace('`(?<!\\\\)u`', $milliseconds, $format), $timestamp);
}

echo udate('Y-m-d H:i:s:u'); // 2010-11-15 21:21:00:987

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