Date difference using only working hours

[G_Williams]

I need help creating a Date difference function using only working hours. Monday to Friday 9 to 5. If a entry was added Friday @ 4:00. I need this function to show 2 hours when viewed Monday @ 10:00.

I've been searching the net for 2 hours looking for something. Surely someone else has needed this in the past.

If someone could help me out or point me in the right direction, I would really appriciate it.

Cheers,
Glen

[sidney]

this works with valid work hours date times greater than one hour differnce needs refining
its not in a function and will probebly require changng the date input formats but should put you going in some direction

$starttime=strtotime("mon, 9 aug 2004 16:00:00");
$endtime=strtotime("wed, 11 aug 2004 10:00:00");
for($i=$starttime;$i<$endtime;$i+=86400)
	{
	$dtime=date("w G i",$i);
	list($day,$hours,$mins)=explode(" ",$dtime);
	if($i==$starttime)
		{
		$difh=17-$hours;
		$difm=($difh*60)-$mins;
		$hold=480-$difm;
		}
	elseif($day >0 && $day <6)
		$difm=$difm+480;
	}

	for($j=$i-($hold*60);$j<$endtime;$j+=3600)
		{$day=date("w",$j);
		if($day >0 && $day <6)
			$difm=$difm+60;
	}
	$dif=($difm/60);
echo $dif." Hours have past";  

[G_Williams]

Excellent! This gives me a starting point anyway. I think I can tweak this for my needs.

Thanks again!!
Glen