Time calculation not considering minutes

[justinhn]

Hey guys,

I'm having a little trouble with time manipulation using PHP, was wondering if anybody could help me.

I'm trying to input 2 time strings, and then find their difference.
eg $start==09:00, $finish==10:30,
and get $difference==01:30

My problem is that currently I am able to subtracts hours, but the minutes are not being considered. So the result i get from the above is 01:00 not 01:30. If i had inputted start=9:00, finish=10:59, i'd still get difference=1:00.

Here is my code so far:

$start == 09:00;
$finish ==10:30;
$startConvert == date("H:i", strtotime("".$start));
$finishConvert == date("H:i", strtotime("".$finish));
$difference = $finishConvert - $startConvert;
$differenceConvert = date("H:i", strtotime("".$difference));

Any suggestions would be most appreciated

• Justin

[Installer]

1) "==" is a comparison operator, not assignment.
2) The times need to be in quotes; they're nonsensical as numerics.

Here's a way to do it:

$start = '09:00'; 
$finish = '10:30'; 
$startConvert = strtotime($start); 
$finishConvert = strtotime($finish); 
$difference = $finishConvert - $startConvert; 
$diff_hrs = floor($difference / (60 * 60));
$diff_secs = round(($difference - ($diff_hrs * 3600)) / 60);
echo $diff_hrs . ':' . $diff_secs;