Fill Values in multidimensional Array (PHP)

[Da_2]

I've got a small problem. I'm working on a little package/product-list.
If you're watching a Package, my website should show you which products are in there.
If a product is more than one time in it, the array should be deleted and the value of the leftover array should be + 1 (each deleted array).

So here's my code:

// $products_in_package has all products in it
// First of all, the products come from a db and don't have a count
// So i first give them a count of 1

foreach ($products_in_package as $product => $value) {
          $products_in_package[$product]['count'] = intval(1);
        }

        foreach ($products_in_package as $product) {
          $id_to_find = intval($product['ID']);
          $product_count = intval($product['count']);
          $found_id = 0;

        // Now I try to find any ident products
        // If found and over 1 time (beacouse he finds the first too of course)
        // Then delete this array and count up the products count

          for ($i=0; $i <= count($products_in_package); $i++) {
            if(intval($products_in_package[$i]['ID']) === $id_to_find){

              $found_id++;
              if($found_id > 1){
                $product_count = $product_count + 1;
                print_r($product_count);
                $product['count'] = $product_count;
                //unset($products_in_package[$i]);
                //array_merge($products_in_package);

                print_r($product['count']);

                while($i > $products_in_package){
                  $i = 0;
                }
              }
            }
          }
        }

What I'm getting is the correct multidimensional array but the count is still 1.
What's wrong with the code?

Everytime I try to log the code i'm getting the right integer. (No, I already tried to delete the chache)
But if I log the array out of the loops, I get always the count of 1.

No answer in 4 days. Probably because the question is unclear. Perhaps this line?

if a product is more than one time in it, the array should be deleted and the value of the leftover array should be + 1

No idea what this means