bcmath有时会返回浮点数，有时会返回舍入结果

I have a variable $newTime, which is time in seconds made by mktime(), and I want to convert it into number of days.

In this case it is over 86.400 (which is a number of seconds in a day), and I try to divide it by 86.400 to get number of days (rounded).

But sometimes I get:

Case 1: 87951 / 86400 = 1.0179513888 (1 day ago)
Case 2: 156257 / 86400 = 1.8085300925 (2 days ago)

and sometimes:

Case 1: 87986 / 86400 = 1 (Should be 1 day ago)
Case 2: 156292 / 86400 = 1 (Should be 2 days ago)

This is the code:

$newTime = round(bcdiv($newTime, bcmul("24", bcmul("60", "60"))),0);

When I don't use bcmath, just the regular math ($newTime / (60*60*24)), I get floating results every time.

Have you set the scale using bcscale? If it is set to 0, it could explain the behaviour. Please, try to call bcscale(100) before your computation;

You could use:

$newTime = round( $newTime / (60 * 60 * 24));

With no bcmath at all please.

Examples:

$newTime = 156292;
$newTime = round( $newTime / (60 * 60 * 24));
echo $newTime; //2 Always

$newTime = 87986;
$newTime = round( $newTime / (60 * 60 * 24));
echo $newTime; //1 Always