php integral value looping!!

[aewarnick]

$i=3;
for(; $i >= 0; --$i)
{
  --$i; echo $i."  ";
}

$i goes back to 3 instead of decrementing to -1.

How can I change that behaviour?

[aewarnick]

Nevermind, I was wrong. I must have done something else wrong in my code.
I just whipped the above up real quick as an example. It turned out to be a bad one.

[aewarnick]

Still having the problem.
Here is the code:

function EndsWith($s, $find, $caseSensitive= 0)
{
	$i= strlen($s);
	$ci= strlen($find);
	if(!$ci || !$i)
		return 0;
	--$i; --$ci;
	$sl; $findL;
	if(!$caseSensitive)
	{
		$sl= strtolower($s); $findL= strtolower($find);
	}
	for(; $i >= 0 && $ci >= 0; --$i, --$ci)
	{
		if($caseSensitive)
		{
			if($s[$i] !== $find[$ci])
				return 0;
		}
		else
		{
			if($sl[$i] !== $findL[$ci])
			{
				echo $ci."  ";
				return 0;
			}
			else echo $ci."  ";
		}
	}
	if($ci == -1)
		return 1;
	return 0;
}

Output is when $ci starts at 3 is:
3 2 1 0 3