removing items from multidimensional array

i have this array $cartSizes[$productid] where $productid is an array of 8 values (qt1-qty8). $cartSizes is stored in a $_SESSION array.

example $cartSizes array that has 3 $productid:

[cartSizes] => Array ( [8061ABL] => Array ( [1] => 0 [2] => 3 [3] => 4 [4] => 5 [5] => 0 [6] => 0 [7] => 0 [8] => 0 ) [6105AAOAU] => Array ( [1] => 3 [2] => 0 [3] => 0 [4] => 0 [5] => 0 [6] => 0 [7] => 0 [8] => 0 ) [8001JNA/WH] => Array ( [1] => 0 [2] => 5 [3] => 0 [4] => 0 [5] => 0 [6] => 0 [7] => 0 [8] => 0 ) )

i want to make a function to delete some contents ($productid) from this array when i press this link...the 'id' i pass is the same as $productid...so it's interchangeable.

<a href="cart.php?action=delete&id='.$id.'" >Remove</a>

in cart.php, i have

switch ($action) {
     
        case 'delete':
                $rows = count($cartSizes);
		for ($i=0; $i<$rows;i++) {
			if ($cartSizes[$i] = $_GET['id'] {
				unset($cartSizes[$i];
			}
		}
		$cartSizes = array_values($cartSizes);
break;}

Code (markup):

this doesn't work....it's an associative array where $productid is a string of alphanumerics, is this what's wrong?

 

huh, i mixed up associative and regular arrays...this seems to work...any further suggestions?

foreach ($cartSizes as $productid) 
		{
			 if ($productid = $_GET['id']) 
			 {			
				unset($cartSizes[$productid]);
			 }
		}

Code (markup):