如果在PHP中没有从while循环返回任何行，则隐藏div

Question

如果没有从MySQL返回的行，我想用类“product-list”隐藏div。 我的div代码如下：

$sql_product = "select * from `product_detail`";
$result_product = $this->db->query($sql_product);

<div class="table-responsive product-list">
    <h5>Product Detail</h5>
    <table class="table table-striped">
        <thead>
            <tr>
                <th>Product Name</th>
                <th>Quantity</th>
                <th>MRP</th>
                <th>Amount</th>
            </tr>
        </thead>
        <tbody>
            <?php
                while($row = mysqli_fetch_array($result_product)){     
                $product_name = $row['product_name'];
                $category_name = $row['category_name'];
                $quantity = $row['quantity'];
                $product_mrp = $row['mrp'];           
                $amount = $row['amount']; 
            ?>
            <tr>
                <th><?php echo $category_name; ?> / <?php echo $product_name; ?></th>
                <th><?php echo $quantity; ?></th>
                <th><?php echo $product_mrp; ?></th>
                <th><?php echo $amount; ?></th>
            </tr>
            <?php } ?>
        </tbody>
    </table>
</div>

Answer 1

只需使用IF语句如下：

  <?php
    $sql_product = "select * from `product_detail`";
    $result_product = $this->db->query($sql_product);

    if ($result_product->num_rows > 0) { ?>
      <div class="table-responsive product-list">
         ...
      </div>
    <?php } ?>