如何以毫秒的精度获得PHP的时间？ [英] How to get time in PHP with nanosecond precision?

问题描述

如果没有，可用的最高精度是多少？

解决方案

microtime 功能是您正在寻找的。

PHP不提供精度高于微秒的功能。

您可以使用 系统如果您正在运行Linux，则可以从机器获取值直接 ：

  $ nanotime = system（'date +％s％N'）; 
  

％s 是由 ％N 附加的秒数，这是纳秒的数量。

Is this even possible in PHP?

If not, what is the highest precision available?

解决方案

The microtime function is what you're looking for.

PHP does not supply a function that has higher precision than microseconds.

You can use the system function to get the value straight from the machine if you are running Linux:

$nanotime = system('date +%s%N');

%s is the amount of seconds, appended by %N, which is the amount of nanoseconds.

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