Ajax Sepet Mantığında Siparişleri Alma Sorunu

session_start();

function addToCart($product_item){

    if (isset($_SESSION['shoppingCart'])) {
        
        $shoppingCart = $_SESSION['shoppingCart'];
        $products = $shoppingCart['products'];
        
    }else{

        $products = array();
    }


    // Adet Kontrolü...

    if(array_key_exists($product_item->urun_id, $products)){
        $products[$product_item->urun_id]->count++;
    } else {
        $products[$product_item->urun_id] = $product_item;
    }

    // Sepetin Hesaplanması...
    $total_price = 0.0;
    $total_count = 0;

    foreach ($products as $product){

        $product->total_price = $product->count * $product->urun_fiyat;
        $total_price = $total_price + $product->total_price;
        $total_count += $product->count;
    }

    $summary["total_price"] = $total_price;
    $summary["total_count"] = $total_count;

    $_SESSION["shoppingCart"]["products"] = $products;
    $_SESSION["shoppingCart"]["summary"]  = $summary;

    return $total_count;

    //print_r($products);
    // $products[$product_item->urun_id] = $product_item;
    // print_r($products);

}

//SEPETE EKLEME ÇIKARMA

if(isset($_POST["p"])){

    $islem = $_POST["p"];

    if ($islem == "addToCart") {

        $id = $_POST['product_id'];

        $product = $db->query("SELECT * FROM urun WHERE urun_id={$id}", PDO::FETCH_OBJ)->fetch();
        $product->count =1;

        echo addToCart($product);
        

    }else if($islem == "removeFromCart"){

        $id = $_POST["product_id"];

        echo removeFromCart($id);
    }


}