Question

I would like check how iteration is between two dates with interval 30 minutes.

I have for example:

$one = new DateTime('2012-01-20 06:00');
$two = new DateTime('2012-01-20 17:30');

$first = $one->format('H:i');
$second = $two->format('H:i');
$interval = 30;

In this example $iteration = 23, but how can i calculate this?

Answer 1

You divide the amount of minutes between the datetimes with the desired interval.

$one = strtotime('2012-01-20 06:00');
$two = strtotime('2012-01-20 17:30');
$interval = 30;

echo round(($two - $one) / ($interval * 60));

(I’ve taken a shortcut and am divided the amount of seconds by amount of seconds in 30 minutes)

http://codepad.org/yhv0hdWl