{code snipped}

You could probably simplify this a bit with mktime(). The syntax is
mktime(hours, minutes, seconds):

$minsec = explode(":", $time);
$numsecs += mktime(0, $minsec[0], $minsec[1]);

That'll give you the number of seconds. Then at the end, you can say:

echo(floor($totalseconds / 60) . " minutes.");

to get the total number of minutes. Use ceil() instead of floor() if you
want to round up instead of down, or just echo((int)$totalseconds); to round
to the nearest integer.

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