Time Calculations

beandip

I hope this makes sense.

I want to be able to calculate 10 minute "slots" once I know the start time and end time. Then once I know the time slots I want to dynamically build a drop-down menu that displays the available time slots. Each time slot can only hold two people, so once two people have picked a certain time slot, that slot should disappear from the drop down list.

To begin with I am trying to figure out if the Coordinator inputs a start time of 8 AM and an end time of 10 am how many slots are there. Obviously there are 6 10 minute slots per hour so a total of 12 slots.

The script should show a drop down that looks like this:

8:00
8:10
8:20
8:30
8:40
8:50
9:00
9:10
9:20
9:30
9:40
9:50

It seems to me that if $timeslot = 10 I should be able to start at $start_time and just increment by 10. However I would think the function would have to be time aware so that it knows once it reaches 8:50, the next slot is 9:00 and not 8:60.

Any thoughts?

TIA
Scott

rulian

you are right,and you can tackle this problem in many ways.
If you want to use PHP native functions you can convert your times to timestamps and add ten minutes 600 seconds then convert them back to a readout time like hh:mm, or in

or you can build a custom function to handle the addition of 10 minutes at a time. by simply going

$current_time="0:0:0";

function sumtime()
{
global $current_time;

$exp=explode(":",$current_time);
list($Days,$Hours,$Minutes) = $exp;
$Minutes=$Minutes + 10;
if ($Minutes==60)
{
$Minutes=0;
$Hours = $Hours + 1;
}
if ($Hours == 24)
{
$Hours = 0;
$Days = $Days + 1;
}
$current_time=$Days.":".$Hours.":".$Minutes;
}

This was real quick, but something or the sort

beandip

Rulian -- I apologize for not posting sooner. Your suggestion was very useful. I was able to take what you said and run with it to get what I wanted. I'm not quite there yet but when I am I will try to post the end result in case it helps others.