Question

请我试着回应下一行中列的总和，但它显示的是prev行。

这是代码

 $body = "<html><body><table border='1'>
<tr>
<th>Shop Name</th>
<th>Product Name</th>
<th>Size</th>
<th>Color Name</th>
<th>Quantity</th>
<th>Price</th>
<th>Cost</th>
</tr>";
$totalPrice = 0;
$pplresult = mysql_query("SELECT * FROM repplac WHERE Uname = '{$_SESSION['username']}'");   
while($row = mysql_fetch_assoc($pplresult)){ 
    $body .= "<tr>
        <td>" . $row['Sname'] ."</td>
        <td>" . $row['Pname'] ."</td>
        <td>" . $row['Psize'] ."</td>
        <td>" . $row['Pcolour'] ."</td>
        <td>" . $row['Pquantity'] ."</td>
        <td>" . $row['Price'] ."</td>
        <td>" . $row['Tprice'] ."</td>
        </tr>";
         $totalPrice += $row['Tprice'];
}
$body .= "<tr>

            <td>" . $totalprice ."</td>
        </tr>";

$body .="</table></body></html>";

Answer 1

给td一个7的colspan，所以它是100％宽：

$body .="<tr>
    <td colspan="7">" . $totalprice ."</td>
    </tr>";

您还可以通过汇总查询中的价格来提高效率：

SELECT *, SUM(Tprice) AS total_price FROM repplac WHERE Uname = '{$_SESSION['username']}'

或

SELECT Sname, Pname, Psize, Pcolour, Pquantity, Price, Tprice, SUM(Tprice) AS total_price FROM repplac WHERE Uname = '{$_SESSION['username']}'

然后在你的PHP中

$body .= ... $row['total_price'] ...;

Answer 2

首先，为什么两次运行相同的查询？您可以在与写出行时相同的迭代中进行求和：

$body = "<html><head><title></title></head><body><table>";
$totalPrice = 0;
$pplresult = mysql_query("SELECT * FROM repplac WHERE Uname = '{$_SESSION['username']}'");   
while($row = mysql_fetch_assoc($pplresult)){ 
    $body .= "<tr>
        <td>" . $row['Sname'] ."</td>
        <td>" . $row['Pname'] ."</td>
        <td>" . $row['Psize'] ."</td>
        <td>" . $row['Pcolour'] ."</td>
        <td>" . $row['Pquantity'] ."</td>
        <td>" . $row['Price'] ."</td>
        <td>" . $row['Tprice'] ."</td>
        </tr>";
    $totalPrice += $row['Tprice'];
}
// echo "$totalprice";
// Add a column with colspan 6 to push the totalprice column under the Tprice column.
$body .= '<tr>
            <td colspan="6">
            <td>' . $totalprice ."</td>
        </tr>";


$body .="</table></body></html>";

Answer 3

您想要显示最后一列下的总数吗？

为此你需要在后面的tr中添加一些td，即

$body .="<tr>
        <td colspan=6></td>
        <td>" . $totalprice ."</td>
    </tr>";

即使您的代码也不合适。为什么你会为同一个mysql查询结果集重复两次while循环，

$pplresult = mysql_query("SELECT * FROM repplac WHERE Uname = '{$_SESSION['username']}'");   
while($row = mysql_fetch_assoc($pplresult)){ 
    $body .= "<tr>
        <td>" . $row['Sname'] ."</td>
        <td>" . $row['Pname'] ."</td>
        <td>" . $row['Psize'] ."</td>
        <td>" . $row['Pcolour'] ."</td>
        <td>" . $row['Pquantity'] ."</td>
        <td>" . $row['Price'] ."</td>
        <td>" . $row['Tprice'] ."</td>
    </tr>";
    $totalprice += $row['TPrice'];
}

$body .="<tr>
            <td colspan=6>Total :</td>
            <td>" . $totalprice ."</td>
        </tr>";


$body .="</table></body></html>";

Answer 4

尝试添加colspan } <td colspan=7>" . $totalprice ."</td>

回显求和结果

4 个答案: