如何将 phtml/php 文件中的变量传递给 js 文件

这是关于Magento电子商务网站的。
我现在需要将一个变量从 view.phtml 传递给 product.js。

首先，我在php文件（view.phtml）中创建了一个if语句，以便从数据库中获取折扣率：

if(Mage::getSingleton('customer/session')->isLoggedIn()) {
    $customerData = Mage::getSingleton('customer/session')->getCustomer();
    //echo $customerData->getemail();
    $conn = Mage::getModel('core/resource')->getConnection('core_read');
            $sql = 'select max(sl.discount_amount) from salesrule sl 
                    join salesrule_customer_group scg on scg.rule_id = sl.rule_id
                    join customer_entity ce on ce.group_id = scg.customer_group_id
                    where ce.email = "'.$customerData->getemail().'";';
        $results = $conn->fetchAll($sql);
        //echo $results;
    }

    else
        { $factor =  100;} //only apply to NOTLOGGED IN's custom option price label

    foreach ($results as $result){
        {   $factor = $result['max(sl.discount_amount)'];
        }
        //echo '<small> Discounted price: </small> $',$prices*($factor/100);        
    } 

如您所见，该方法正在重新调整$factor，我需要将此变量$factor传递给 product.js（javascript） 文件中。

  var subPrice = 0;
            var subPriceincludeTax = 0;

            //var a = test;
            Object.values(this.customPrices).each(function(el){
                if (el.excludeTax && el.includeTax) {
                    subPrice += parseFloat(el.excludeTax); // this will affect the price when changing option *important
                    //so need to change somewhere else in the same time to full fill the requirementirement
                    // but it doesn;t change to backend value
                    subPriceincludeTax += parseFloat(el.includeTax);
                } else {
                    subPrice += parseFloat(el.price);
                    subPriceincludeTax += parseFloat(el.price);
                }
            });
            excl += subPrice;//also affect the final price *frontEnd
            incl += subPriceincludeTax;

我试图通过 JSON 传递它，但它根本不起作用，我无法弄清楚原因。我有类似echo json_encode($factor);的东西来验证输出，它看起来不错，但仍然无法传递到外部 js 文件。

谁能帮忙？谢谢

更新 1：在 php 文件中，我添加了这些：

var optionsPrice = new Product.OptionsPrice(<?php echo $this->getJsonConfig() ?>); 
var tester = "<?php echo json_encode($factor);?>"
</script>

并将这些代码传递给 js，例如：

var subPrice = 0;
            var subPriceincludeTax = 0;
            var tester = tester;
            //var a = test;
            Object.values(this.customPrices).each(function(el){
                if (el.excludeTax && el.includeTax) {
                    subPrice += parseFloat(el.excludeTax)*tester; // this will affect the price when changing option *important
                    //so need to change somewhere else in the same time to full fill the requirementirement
                    // but it doesn;t change to backend value
                    subPriceincludeTax += parseFloat(el.includeTax);
                } else {
                    subPrice += parseFloat(el.price);
                    subPriceincludeTax += parseFloat(el.price);
                }
            });
            excl += subPrice;//also affect the final price *frontEnd
            incl += subPriceincludeTax;

但这似乎不起作用:(

更新 2根据 outlooker，我尝试在 phtml 文件中添加输入类型，如下所示：

<script type="text/javascript">
var optionsPrice = new Product.OptionsPrice(<?php echo $this->getJsonConfig() ?>); //the var of the option price, disable to disable price options
**<input type="hidden" id="factorDiscount" value="<?php echo $factor;?>"/>**
</script>

之后，我还在 js 文件中实现了 var，调用并使用它：

    var subPrice = 0;
            var subPriceincludeTax = 0;
            var factor = $("#factorDiscount").val();//is not global

            Object.values(this.customPrices).each(function(el){
                if (el.excludeTax && el.includeTax) {
                    subPrice += parseFloat(el.excludeTax)*factor; // this will affect the price when changing option *important
                    subPriceincludeTax += parseFloat(el.includeTax);
                } else {
                    subPrice += parseFloat(el.price);
                    subPriceincludeTax += parseFloat(el.price);
                }
            });

它现在不起作用，但我明白你的意思，但我可能不会以正确的方式插入代码。有什么意见吗？先生，谢谢

更新 3谢谢你的帮助，先生。我完美地将代码插入了 phtml 文件中，但是当我尝试使用它时，它似乎没有从 php 获取数据

var subPrice = 0;
            var subPriceincludeTax = 0;
            var factor = $("#factorDiscount").val();//I declare the var here

            Object.values(this.customPrices).each(function(el){
                if (el.excludeTax && el.includeTax) {
                    subPrice += parseFloat(el.excludeTax)*factor; // trying to times the var factor with the price but don't know if i am doing the right things.
                    subPriceincludeTax += parseFloat(el.includeTax);
                } else {
                    subPrice += parseFloat(el.price);
                    subPriceincludeTax += parseFloat(el.price);
                }
            });