PHP时间表计算过去24小时

Question

I'm trying to calculate a timesheet i'm working on within a JS onChange event, the following works but it wont work past midnight, for example 23:00 - 01:00 returns 22 instead of 2 or rather 2.00 as I'd like it to report to 2 decimal places.

$startm = date_create({mS}); //create a php datetime object
$finishm = date_create({mF});
$t_diff = date_diff($startm, $finishm); //calculate the difference
{mT} = $t_diff->h + round($t_diff->i/60,2) + {mOt} + {mOt2} /24; //add everything up

The form has the following fields

    Start Tme = mS - 24hr time 
    Finish Time = mF - 24hr time
    Overtime = mOt - int
    Overtime 2 = mOt2 - int
    Total = mT - int

Answer 1

You can just add a check if $startm is past noon and $finishm is NOT past noon, $total -= 12 . This of course won't work for shifts that last more than 24 hours, but that doesn't seem to be an acceptance criteria for your code.