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我正在尝试在 opencart.com 的购物车中创建一个您保存的选项。我已经使用 vqmod 完成了与您保存相同的功能以显示在产品页面中。但我发现购物车很难做到这一点。这是我的 vqmod 代码，用于在产品页面中添加您的保存选项。

<modification>
    <id><![CDATA[@tik Savings Note]]></id>
    <version><![CDATA[1.1]]></version>
    <vqmver><![CDATA[2.1.7]]></vqmver>
    <author><![CDATA[OC2PS]]></author>
    <file name="catalog/view/theme/default/template/product/product.tpl">
        <operation>
            <search position="before" offset="2" error="log"><![CDATA[<?php if ($tax) { ?>]]></search>
            <add><![CDATA[<br /><span class="you-save" style="color:red;"><?php echo $text_yousave; ?> <?php echo $yousave; ?></span>]]></add>
        </operation>
    </file>
    <file name="catalog/language/english/product/product.php">
       <operation>
            <search position="replace" error="log"><![CDATA[// Entry]]></search>
            <add><![CDATA[$_['text_yousave']        = 'You save:';// Entry]]></add>
       </operation>
    </file>
    <file name="catalog/controller/product/product.php">
        <operation>
            <search position="replace" error="log"><![CDATA[$data['text_tax'] = $this->language->get('text_tax');]]></search>
            <add><![CDATA[$data['text_tax'] = $this->language->get('text_tax');
                 $data['text_yousave'] = $this->language->get('text_yousave');]]></add>
        </operation>
        <operation>
            <search position="replace" error="log"><![CDATA[$data['special'] = $this->currency->format($this->tax->calculate($product_info['special'], $product_info['tax_class_id'], $this->config->get('config_tax')));]]></search>
            <add><![CDATA[$data['special'] = $this->currency->format($this->tax->calculate($product_info['special'], $product_info['tax_class_id'], $this->config->get('config_tax')));
                $data['yousave'] = $this->currency->format($this->tax->calculate($product_info['price']-$product_info['special'], $product_info['tax_class_id'], $this->config->get('config_tax')));
                $data['yousavepercent'] = round(($product_info['price']-$product_info['special'])*100/$product_info['price'],0);]]></add>
        </operation>
        <operation>
            <search position="replace" error="log"><![CDATA[$special = $this->currency->format($this->tax->calculate($result['special'], $result['tax_class_id'], $this->config->get('config_tax')));]]></search>
            <add><![CDATA[$special = $this->currency->format($this->tax->calculate($result['special'], $result['tax_class_id'], $this->config->get('config_tax')));
                    $yousave = $this->currency->format($this->tax->calculate($result['price']-$result['special'], $result['tax_class_id'], $this->config->get('config_tax')));
                    $yousavepercent = round(($result['price']-$result['special'])*100/$result['price'],0);]]></add>
        </operation>        
    </file>
</modification>
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