Php 如何使用angularjs在mysql中存储数学函数值？

我正在创建发票生成器。因为我想在我的数据库中存储总计、折扣和所有内容。 总额和折扣的计算如下

<tr ng-repeat="list in data">
  <td> 
    <label class="clabel">Subtotal</label>
  </td>
  <td ng-model="subtotal">{{list.sale_price*list.quantity}}</td>
</tr>
<tr ng-repeat="list in data">
  <td> 
    <label class="clabel">Tax(2%)</label>
  </td>
  <td ng-model="tax">{{((list.sale_price*list.quantity)*2)/100}}</td>
</tr>
<tr ng-repeat="list in data">
  <td> 
    <label class="clabel">Discount(%)</label>
  </td>
  <td ng-model="discount">{{((list.sale_price*list.quantity)*list.discount)/100}}</td>
</tr>
<tr ng-repeat="list in data">
  <td> 
    <label class="clabel">Total</label>
  </td>
  <td ng-model="total">{{((list.sale_price*list.quantity)+(((list.sale_price*list.quantity)*2)/100))-(((list.sale_price*list.quantity)*list.discount)/100)}}</td>
</tr>
<tr>
    <td colspan="2">
    <button class="btn btn-success" style="margin-left:400px;" ng-click="GenerateBill();updateAll()">Generate Invoice</button>
    </td>
</tr>

请帮帮我…

你可以试试这个

$scope.updateAll=function()
{ 
     data={
                subtotal:$scope.product.sale_prize*$scope.product.quantity,
                tax:$scope.product.sale_prize * $scope.product.quantity*2/100,
                discount:$scope.product.sale_prize * $scope.product.quantity*$scope.product.discount/100,
                total:$scope.product.sale_prize * $scope.product.quantity+$scope.product.sale_prize * $scope.product.quantity*2/100-$scope.product.sale_prize *$scope.product.quantity* $scope.product.discount/100

         }

        $http.post("../pos_system/Widgets/updatedata.php?barc="+$scope.barc,data).success(function(data)
       { 
           //do your stuff here;
        });
 }

在HTML部分进行此更改

<tr >
  <td> 
    <label class="clabel">Subtotal</label>
  </td>
  <td><input type="text" class="cinput" placeholder="sale price"  ng-value="list.sale_price*list.quantity" readonly="" />
  </td>
</tr>
<tr >
  <td> 
    <label class="clabel">Tax(2%)</label>
  </td>
  <td><input type="text" class="cinput" placeholder="sale price"  ng-value="((list.sale_price*list.quantity)*2)/100" readonly="" />
  </td>
</tr>
<tr>
  <td> 
    <label class="clabel">Discount(%)</label>
  </td>
  <td>
  <input type="text" class="cinput" placeholder="sale price"  ng-value="((list.sale_price*list.quantity)*list.discount)/100" readonly="" />
  </td>
</tr>
<tr >
  <td> 
    <label class="clabel">Total</label>
  </td>
  <td >
  <input type="text" class="cinput" placeholder="sale price"  ng-value="((list.sale_price*list.quantity)+(((list.sale_price*list.quantity)*2)/100))-(((list.sale_price*list.quantity)*list.discount)/100)" readonly="" />
  </td>
</tr>
<tr>
    <td colspan="2">
    <button class="btn btn-success" style="margin-left:400px;" ng-click="GenerateBill();updateAll()">Generate Invoice</button>
    </td>
</tr>

小计
税款（2%）
折扣（%）
全部的
生成发票

如果您想让我们为您编写整个数据库层，那就太宽泛了。更不用说您还没有提供任何关于平台的信息。

<tr >
  <td> 
    <label class="clabel">Subtotal</label>
  </td>
  <td><input type="text" class="cinput" placeholder="sale price"  ng-value="list.sale_price*list.quantity" readonly="" />
  </td>
</tr>
<tr >
  <td> 
    <label class="clabel">Tax(2%)</label>
  </td>
  <td><input type="text" class="cinput" placeholder="sale price"  ng-value="((list.sale_price*list.quantity)*2)/100" readonly="" />
  </td>
</tr>
<tr>
  <td> 
    <label class="clabel">Discount(%)</label>
  </td>
  <td>
  <input type="text" class="cinput" placeholder="sale price"  ng-value="((list.sale_price*list.quantity)*list.discount)/100" readonly="" />
  </td>
</tr>
<tr >
  <td> 
    <label class="clabel">Total</label>
  </td>
  <td >
  <input type="text" class="cinput" placeholder="sale price"  ng-value="((list.sale_price*list.quantity)+(((list.sale_price*list.quantity)*2)/100))-(((list.sale_price*list.quantity)*list.discount)/100)" readonly="" />
  </td>
</tr>
<tr>
    <td colspan="2">
    <button class="btn btn-success" style="margin-left:400px;" ng-click="GenerateBill();updateAll()">Generate Invoice</button>
    </td>
</tr>