利用PHP的纳秒计时器获取当前时间精确到纳秒

<?php

/**
 * Created by PhpStorm.
 * User: LinFei
 * Created time 2022/11/25 15:10:51
 * E-mail: fly@eyabc.cn
 */
declare (strict_types=1);

date_default_timezone_set('Asia/Shanghai');

// 获取当前纳秒计时器时间
$currentHrtime = hrtime(true);
// 获取当前时间戳转换为纳秒
$time = microtime(true) * 1.0E9;
// 计算出纳秒计时器跟当前时间的时间差
$timeDiff = $time - $currentHrtime;

while (true) {
    // 获取当前精确到纳秒的时间戳
    $currentTime = hrtime(true) + $timeDiff;

    var_dump(number_format($currentTime, 0, '', ''));
    var_dump(date('Y-m-d H:i:s', intval($currentTime / 1.0E9)));

    sleep(1);
}