Time Trouble

[phlow]

I tried to create an array[year][month][day] that contains a 1 whenever the day exists, e.g. array[2002][11][19] should be 1 while array[2002][2][30] should be 0.
I always get a parse error ("Cannot use a scalar value as an array") in the line where I want to set the 1.
My code

for($i=2002; $i<=2003; $i++) // years
{
	$valid[$i]=1;

for($j=1; $j<=12; $j++) // months
{
	$valid[$i][$j]=1; // ERROR

	for($k=1; $k<=31; $k++) // days
	{
		if(checkdate($j, $k, $i)==1)
		{
			$valid[$i][$j][$k]=1; //ERROR
		}
	}
}
}

I would be really thankful for any hints. Thanx, Phlow.

[Weedpacket]

You use $valid[$i]=1; which makes $valid[$i] a number. Because it's a number, saying $valid[$i][$j] doesn't make sense, because $valid[$i] isn't an array.

Why do you have the lines
$valid[$i]=1;
$valid[$i][$j]=1;
anyway? That's saying (by your description) that years and months are valid days as well.