如何在PHP中减去microtime并以毫秒显示日期?
作者:互联网
如何在PHP中减去microtime并以毫秒显示日期?
例如:我已设置结束日期和时间
$endtime = 2012-02-21 10:29:59;
然后我有当前日期或开始日期与微量时间转换
$starttime = 2012-02-21 10:27:59.452;
function getTimestamp()
{
$microtime = floatval(substr((string)microtime(), 1, 8));
$rounded = round($microtime, 3);
return date("Y-m-d H:i:s") . substr((string)$rounded, 1, strlen($rounded));
}
echo getTimestamp(); //sample output 2012-02-21 10:27:59.452
现在我想减去:
$finaldate = $endtime – $starttime;
我希望我的输出是这样的:00:00:02.452
解决方法:
您需要使用microtime作为开始/结束值,并且只将其格式化以便在结尾显示.
// Get the start time in microseconds, as a float value
$starttime = microtime(true);
/************/
/* Do stuff */
/************/
// Get the difference between start and end in microseconds, as a float value
$diff = microtime(true) - $starttime;
// Break the difference into seconds and microseconds
$sec = intval($diff);
$micro = $diff - $sec;
// Format the result as you want it
// $final will contain something like "00:00:02.452"
$final = strftime('%T', mktime(0, 0, $sec)) . str_replace('0.', '.', sprintf('%.3f', $micro));
注意:这是从microtime返回浮点值并使用浮点运算来简化数学运算,因此浮动舍入问题可能导致您的数字略微偏离,但您最终将结果舍入为3位数,并且有轻微的波动在处理器时序中,无论如何都要大于浮点错误,所以这对你来说不是多个问题.
标签:php,microtime 来源: https://codeday.me/bug/20190929/1830359.html