[英]How to get ID on a specific row in PHP and MySQL
PHP给我的错误
注意:未定义的索引:第6行的C:\\ xampp \\ htdocs \\ odieinventory \\ admin \\ add_sales.php中的product_id
这是我的查询
<?php
if (isset($_POST['addCart'])) {
$product_id = $_POST['product_id'];
$qtyBuy = $_POST['qtyBuy'];
$addQuery = "INSERT INTO sales (product_id, quantity) VALUES ($product_id, $qtyBuy)";
$execQuery = mysqli_query($connection, $addQuery);
}
?>
这是我的桌子
<form action="add_sales.php" method="POST">
<?php
$query = "SELECT * FROM products";
$exec = mysqli_query($connection, $query);
while ($row = mysqli_fetch_array($exec)) {
$product_id = $row['product_id'];
$product_name = $row['product_name'];
$description = $row['description'];
$product_quantity = $row['quantity'];
$product_price = $row['sell_price'];
?>
<tr>
<td class="text-center"><?php echo $product_id; ?>
<input type="hidden" name="product_id" value="<?php echo $product_id; ?>">
</td>
<td><?php echo $product_name; ?></td>
<td><?php echo $description; ?></td>
<td><?php echo $product_price; ?></td>
<td><?php echo $product_quantity; ?></td>
<td><input type="number" min="1" max="999" name="qtyBuy"></td>
</tr>
<?php } ?>
</tbody>
</table>
</div>
<div class="form-group">
<input type="submit" name="addCart" value="Add Items to Cart" class="btn btn-info pull-right">
</div>
</div>
</form>
我也想寻求有关如何在购物车中插入记录的建议。 通过单击“将项目添加到购物车”,我只想通过购物车上的定量输入传递带有值的项目。 如何用PHP实现呢?
在表文件table.php中,您必须:
1-打开table
并tbody
HTML标签
2-使您的html属性表单名称为数组(您有多个具有相同名称的输入),在这种情况下,您仅提交了最后一个product_id
和最后一个qtyBuy
输入值。
<form action="add_sales.php" method="POST">
<div><table><tbody>
<?php
$query = "SELECT * FROM products";
$exec = mysqli_query($connection, $query);
while ($row = mysqli_fetch_array($exec)) {
$product_id = $row['product_id'];
$product_name = $row['product_name'];
$description = $row['description'];
$product_quantity = $row['quantity'];
$product_price = $row['sell_price'];
?>
<tr>
<td class="text-center"><?php echo $product_id; ?>
<input type="hidden" name="product_id[]" value="<?php echo $product_id; ?>">
</td>
<td><?php echo $product_name; ?></td>
<td><?php echo $description; ?></td>
<td><?php echo $product_price; ?></td>
<td><?php echo $product_quantity; ?></td>
<td><input type="number" min="1" max="999" name="qtyBuy[]"></td>
</tr>
<?php } ?>
</tbody>
</table>
</div>
<div class="form-group">
<input type="submit" name="addCart" value="Add Items to Cart" class="btn btn-info pull-right">
</div>
</form>
在您的add_sales.php文件中,您必须循环$_POST['qtyBuy']
变量,并检查每种产品的给定数量是否> 0
<?php
if (isset($_POST['addCart']) && $_POST['addCart']=="Add Items to Cart") {
foreach($_POST['qtyBuy'] as $index=>$value){
if($value > 0){
$addQuery = "INSERT INTO sales (product_id, quantity) VALUES (".$_POST['product_id'][$index].", ".$value.")";
$execQuery = mysqli_query($connection, $addQuery);
}
}
}
?>
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