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最近，我为我的企业安装了 Opencart cms，以便销售和出租一些产品。起初一切都还好，我设计了一个标志，创造了一个漂亮的主题并加入了一个新的类别。但是一段时间后，我发现不编辑 Opencart 的源代码就无法租用产品，我发现很难做到这一点。我尝试通过在第 239 行添加 $product_data[] 语句并将加号替换为 'price' 和 'total' 的乘号来进行编辑/catalog/controller/checkout/cart.php，如下if-else所示：

从：

 $product_data[] = array(
                    'cart_id'         => $cart['cart_id'],
                    'product_id'      => $product_query->row['product_id'],
                    'name'            => $product_query->row['name'],
                    'model'           => $product_query->row['model'],
                    'shipping'        => $product_query->row['shipping'],
                    'image'           => $product_query->row['image'],
                    'option'          => $option_data,
                    'download'        => $download_data,
                    'quantity'        => $cart['quantity'],
                    'minimum'         => $product_query->row['minimum'],
                    'subtract'        => $product_query->row['subtract'],
                    'stock'           => $stock,
                    'price'           => ($price + $option_price),
                    'total'           => ($price + $option_price) * $cart['quantity'],
                    'reward'          => $reward * $cart['quantity'],
                    'points'          => ($product_query->row['points'] ? ($product_query->row['points'] + $option_points) * $cart['quantity'] : 0),
                    'tax_class_id'    => $product_query->row['tax_class_id'],
                    'weight'          => ($product_query->row['weight'] + $option_weight) * $cart['quantity'],
                    'weight_class_id' => $product_query->row['weight_class_id'],
                    'length'          => $product_query->row['length'],
                    'width'           => $product_query->row['width'],
                    'height'          => $product_query->row['height'],
                    'length_class_id' => $product_query->row['length_class_id'],
                    'recurring'       => $recurring
                );

至：

if $option_query->row['type'] == 'select' & $option_query->row['name'] == 'Duration')
{
$product_data[] = array(
                'cart_id'         => $cart['cart_id'],
                'product_id'      => $product_query->row['product_id'],
                'name'            => $product_query->row['name'],
                'model'           => $product_query->row['model'],
                'shipping'        => $product_query->row['shipping'],
                'image'           => $product_query->row['image'],
                'option'          => $option_data,
                'download'        => $download_data,
                'quantity'        => $cart['quantity'],
                'minimum'         => $product_query->row['minimum'],
                'subtract'        => $product_query->row['subtract'],
                'stock'           => $stock,
                'price'           => ($price * $option_price),
                'total'           => ($price * $option_price) * $cart['quantity'],
                'reward'          => $reward * $cart['quantity'],
                'points'          => ($product_query->row['points'] ? ($product_query->row['points'] + $option_points) * $cart['quantity'] : 0),
                'tax_class_id'    => $product_query->row['tax_class_id'],
                'weight'          => ($product_query->row['weight'] + $option_weight) * $cart['quantity'],
                'weight_class_id' => $product_query->row['weight_class_id'],
                'length'          => $product_query->row['length'],
                'width'           => $product_query->row['width'],
                'height'          => $product_query->row['height'],
                'length_class_id' => $product_query->row['length_class_id'],
                'recurring'       => $recurring
            );
}else{
$product_data[] = array(
                'cart_id'         => $cart['cart_id'],
                'product_id'      => $product_query->row['product_id'],
                'name'            => $product_query->row['name'],
                'model'           => $product_query->row['model'],
                'shipping'        => $product_query->row['shipping'],
                'image'           => $product_query->row['image'],
                'option'          => $option_data,
                'download'        => $download_data,
                'quantity'        => $cart['quantity'],
                'minimum'         => $product_query->row['minimum'],
                'subtract'        => $product_query->row['subtract'],
                'stock'           => $stock,
                'price'           => ($price + $option_price),
                'total'           => ($price + $option_price) * $cart['quantity'],
                'reward'          => $reward * $cart['quantity'],
                'points'          => ($product_query->row['points'] ? ($product_query->row['points'] + $option_points) * $cart['quantity'] : 0),
                'tax_class_id'    => $product_query->row['tax_class_id'],
                'weight'          => ($product_query->row['weight'] + $option_weight) * $cart['quantity'],
                'weight_class_id' => $product_query->row['weight_class_id'],
                'length'          => $product_query->row['length'],
                'width'           => $product_query->row['width'],
                'height'          => $product_query->row['height'],
                'length_class_id' => $product_query->row['length_class_id'],
                'recurring'       => $recurring
            );                              
}

但是当我尝试测试它时，当我在同一张卡上放置一个带有另一个不同选项的持续时间选项时，我会为所有卡片项目获得一大笔款项 ($price * $option_price)

请问我该如何解决它或者是否有另一种方法可以在 Opencart 上同时出租和销售产品

简化： 我想添加一个持续时间选项价格（1 天或 2 天...），客户可以选择租用产品的天数并退货。总计 = 项目价格 * 持续时间（天数） * 产品数量

4

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