calculations with time...

[miles_rich]

can nyone tell me a good way to do easy calculations with time, eg hours, and mins??

so if i start traveling at 6.30 and stop at 12, how long have i been traveling?? 5.30 hours...

if you understand what i mean please help.

[_SuperString]

do it like this:

// function for geting the time difference in minutes.
function CorrectMinutes($time1, $time2)
{
	$t2ar = explode(".", $time2);
		$h2 = $t2ar[0];
		$m2 = $t2ar[1];
	$t1ar = explode(".", $time1);
		$h1 = $t1ar[0];
		$m1 = $t1ar[1];
	$h = $h2 - $h1;
	$m = $m2 - $m1;
	$mm = ($h*60) +$m;
return $mm;
}

// function for converting minutes back to hours
function CorrectHours($Minutes)
{
	if ($Minutes < 0) { $Min = Abs($Minutes);
	} else {
		$Min = $Minutes;
	} 
  		$H = Floor($Min / 60);
  		$M = ($Min - ($H * 60)) / 100;
  		$Hours = $H + $M;
    if ($Minutes < 0) {
		$Hours = $Hours * (-1);
	}
		$expl = explode(".", $Hours);
		$H=$expl[0];
	if (empty($expl[1])) {
		$expl[1]=00;
	}
		 $M=$expl[1];
	if (strlen($M)<2) {
		$M = $M . 0;
	}
		$Hours=$H . "." . $M;
return $Hours;
}


// run it like this
$time1 = "09.30";
$time2 = "17.00";

$minutes = CorrectMinutes($time1,$time2);
$hours = CorrectHours($minutes);

echo "the differnce between $time1 and $time2 is:<br>";
echo "minutes = $minutes<br>";
echo "hours = $hours";

[miles_rich]

Thankyou very mush super lol