Question

我正在尝试创建一个循环以在我的结帐页面上显示购物车总额。我试图在循环中创建一些数组变量来保存我的值，但控制台给了我一个“ 意外的错误。 *附加到“ p”和“ q”的“ i”值是指我的购物车表中所显示产品的ID。

购物车表代码：

<?php 
$query = "select * from tbl_cart WHERE 
member_id= '$member_id'";
$result = mysqli_query($conn,$query);
if (!$result) {
printf("Error: %s\n", mysqli_error($conn));
exit();
}
echo "<table id='anyclass'>";
echo "<tr>
         <th style= border-right-style:none; 
id='image1'></th>
         <th style= text-align: center; 
border-left-style:none; 
id='product1'>Product</th>
         <th id='price1'>Price</th>
         <th id='quantity1'>Quantity</th>
         <th id='remove1'>Remove</th>


    </tr>";

$i=1;
while($row = $result->fetch_assoc()) {  


echo "<tr class= 'trhide'>";

echo          '<td style=border-right-
style:none;><img src="' . $row['image'] 
. '" /></td>';

echo          "<td style=border-left-
style:none; 
id='product'>".$row['product_id']."</td>";

echo "<td style= 'text-align: right;' id= 
'p$i' >".$row['price']."
</td>"; 
echo          "<td id= 'quantity' >". "
<input id= 'q$i' style='border:none' 
type = 'text' class= 'change' value= 
$row[quantity] name= $row[id] data-id= 
$row[id] 
>" . "</td>";

echo          "<td id= 'delete'><span 
class='delete' data-id= $row[id] ><img 
src=delete.svg></span></td>";  

echo          "<td id= 'o$i' >".$row['oz']."
</td>"; 
echo      "</tr>";

  $i++;
}
echo  "<tr>
          <td>Total:</td>
          <td id= 'total'></td>

  </tr>";
echo "</table>";


 ?>

    <script>
var total0=0;
var sum=0;
var i;
for (i = 1; i < 1000; i++) { 
   if(document.getElementById("p"+i)==null){
     var p[i]= 0;
    }

else{varp[i]=parseFloat
(document.getElementById
('p'+i).innerText)*100;}




if(document.getElementById('q'+i)==null){
     var q[i]= 0;
    }
    else{var q[i]= 
document.getElementById('q'+i).value;
    }


    var total[i]= parseInt(p[i]) * 
parseInt(q[i]);

    var sum= sum + total[i];

}

window.alert(sum);

</script>

Answer 1

我不确定这是否是好的代码，但是它对我有用，并解决了我的问题。

<script>
var total0=0;
var sum=0;
var i;
var q = new Array();
var p = new Array();
var total = new Array();
for (i = 1; i < 1000; i++) { 
   if(document.getElementById("p"+i)==null){
      p[i]= 0;
    }

else{p[i]=parseFloat(document.getElementById('p'+i)
.innerText)*100;
    }

     if(document.getElementById('q'+i)==null){
     q[i]= 0;
    }
    else{q[i]= document.getElementById('q'+i).value;
    }



    total[i]= parseInt(p[i]) * parseInt(q[i]);

    var sum= sum + total[i];

}

var result= sum/100;
document.getElementById('total').innerHTML = '$' + 
result;

javascript购物车数学循环

1 个答案: