错误无法删除购物车中的重复商品

Question

在显示产品清单的索引页面上，将同一产品添加到购物车。

index.php

<?php
    session_start();
    include('php/config.php');
    $status="";

    if (isset($_POST['id_product']) && $_POST['id_product']!=""){
        $id_product = $_POST['id_product'];

        $sql = $mysqli->prepare("SELECT id_product,product,price,imagen FROM products WHERE id_product=?");
        $sql->bind_param("i",$id_product);
        $sql->execute();
        $sql->bind_result($id_product,$product,$price,$imagen);
        $sql->fetch();

        $cartArray = array(
            $id_product=>array(
                'id_product'=>$id_product,
                'product'=>$product,
                'price'=>$price,
                'quantity'=>1,
                'imagen'=>$imagen
            )
        );

        if(empty($_SESSION["shopping_cart"])) {
            $_SESSION["shopping_cart"] = $cartArray;
            $status = "<div class='box'>The product was added to the cart!</div>";
        } else {
            $array_keys = array_keys($_SESSION["shopping_cart"]);
            if(in_array($id_product,$array_keys)) {
                $status = "<div class='box' style='color:red;'>The product is already added to your cart!</div>";
            } else {
                $_SESSION["shopping_cart"] = array_merge($_SESSION["shopping_cart"],$cartArray);
                $status = "<div class='box'>The product was added to the cart!</div>";
            }
        }
    }
?>
    <div class="container">
        <div class="starter-template center-screen">
            <h1>List of products</h1>
            <?php
                $result = $mysqli->prepare("SELECT id_product,product,price,imagen FROM products");
                $result->execute();
                $result->store_result();

                $result->bind_result($id_product,$product,$precio,$imagen);
                while ($result->fetch()) {
                    echo "<div class='product_wrapper'>
                    <form method='post' action=''>
                    <input type='hidden' name='id_product' value=".$id_product." />
                    <div class='image'><img src='".$imagen."' /></div>
                    <div class='name'>".$product."</div>
                    <div class='price'>$".$price."</div>
                    <button type='submit' class='buy'>Buy Now</button>
                    </form>
                    </div>";
                }
            ?>  
        </div>
        <div style="clear:both;"></div>
        <div class="message_box" style="margin:10px 0px;">
            <?php echo $status; ?>
        </div>
    </div>

我在购物车的页面上显示并添加了消除产品的动作

cart.php

<?php
    session_start();
    $status="";
    if (isset($_POST['action']) && $_POST['action']=="remove"){
        if(!empty($_SESSION["shopping_cart"])) {
            foreach($_SESSION["shopping_cart"] as $key => $value) {
                if($_POST["id_product"] == $key){
                    unset($_SESSION["shopping_cart"][$key]);
                    $status = "<div class='box' style='color:red;'>The product is removed from your cart!</div>";
                }
                if(empty($_SESSION["shopping_cart"]))
                    unset($_SESSION["shopping_cart"]);
            }
        }
    }
?>
                <table class="table">
                    <tbody>
                        <tr>
                            <td></td>
                            <td>ARTICLE</td>
                            <td>QUANTITY</td>
                            <td>PRICE</td>
                            <td>SUBTOTAL</td>
                        </tr>
                        <?php
                            foreach ($_SESSION["shopping_cart"] as $product){
                        ?>
                        <tr>
                            <td><img src='<?php echo $product['imagen']; ?>' width="50" height="40" /></td>
                            <td><?php echo $product['product']; ?><br>
                                <form method='post' action=''>
                                    <input type='hidden' name='id_producto' value="<?php echo $product["id_product"]; ?>" />
                                    <input type='hidden' name='action' value="remove" />
                                    <button type='submit' class='remove'>Remove Item</button>
                                </form>
                            </td>
                            <td>
                                <?php echo $product['quantity']; ?>                             
                            </td>
                            <td><?php echo "$".$product["price"]; ?></td>
                            <td><?php echo "$".$product["price"]*$product["quantity"]; ?></td>
                        </tr>
                        <?php
                            $total_price += ($product["price"]*$product["quantity"]);
                        }
                        ?>
                        <tr>
                            <td colspan="5" align="right">
                                <strong>TOTAL: <?php echo "$".$total_price; ?></strong><br>
                            </td>
                        </tr>
                    </tbody>
                </table>

我提出的问题是产品被重复，并且不能消除重复的产品

enter image description here

我做错了什么，请帮帮我