我有两页。 menu.php是显示数据库中所有项目的地方，并且有一个＆＃34; ADD＆＃34;按钮添加这些项目。这些项应该被添加到另一个页面中的表中（addtocart.php）。问题是它只添加了我点击＆＃34;添加＆＃34;的第一个项目。按钮。当我为其他项目做同样的事情时，它什么都不做。
这里只添加了一个项目，当我返回并再次点击另一个项目的添加按钮时，表格中没有任何内容。它只保留一个项目，没有更新。 Addtocart.php
以下是menu.php
<div id = "breakfast2">
<h2>Breakfast</h2>
<?php
$conn1 = mysqli_connect("localhost", "root", "", "cart_mexican") or
die();
$dbsql1 = "SELECT * FROM breakfast ORDER BY id ";
$query1 = mysqli_query($conn1, $dbsql1);
if(mysqli_num_rows($query1) > 0)
{
while($row1= mysqli_fetch_assoc($query1) or die)
{
?>
<div class = "col-md-4">
<form method = "POST" action ="addtocart.php?action = add &id=<?phpecho
$row1 ['id']; ?>">
<img src = "<?php echo $row1["image_path"]; ?>" class = "img-responsive"
/><br>
<h4 class ="text-primary"><?php echo $row1["name"]; ?></h4>
<center><h4 class = "text-primary">Rs <?php echo $row1["price"]; ?></h4>
</center>
<input type = "text" name ="quantity" class = "form-control"
style="width: 260px" />
<input type = "hidden" name ="hidden_name" value = "<?php echo
$row1["name"]; ?>" />
<input type = "hidden" name ="hidden_price" value = "<?php echo
$row1["price"]; ?>" />
<center><input type = "submit" name ="add_to_cart" style = "margin-
left:0px; margin-top: 5px;" class ="btn btn-small btn-success" value=
"Add"/>
</div>
</form>
</div>
<?php
}
}
?>
以下是addtocart.php
<?php
session_start();
$connect = mysqli_connect("localhost", "root", "", "cart_mexican");
if(isset($_POST["add_to_cart"]))
{
if(isset($_SESSION["shopping_cart"]))
{
$item_array_id = array_column($_SESSION["shopping_cart"], "item_id");
if(!in_array($_GET["id"], $item_array_id))
{
$count = count($_SESSION["shopping_cart"]);
$item_array = array(
'item_id' => $_GET["id"],
'item_name' => $_POST["hidden_name"],
'item_price' => $_POST["hidden_price"],
'item_quantity' => $_POST["quantity"]
);
$_SESSION["shopping_cart"][$count] = $item_array;
}
else
{
echo '<script>alert("Item Already Added")</script>';
echo '<script>window.location="addtocart.php"</script>';
}
}
else
{
$item_array = array(
'item_id' => $_GET["id"],
'item_name' => $_POST["hidden_name"],
'item_price' => $_POST["hidden_price"],
'item_quantity' => $_POST["quantity"]
);
$_SESSION["shopping_cart"][0] = $item_array;
}
}
if(isset($_GET["action"]))
{
if($_GET["action"] == "delete")
{
foreach($_SESSION["shopping_cart"] as $keys => $values)
{
if($values["item_id"] == $_GET["id"])
{
unset($_SESSION["shopping_cart"][$keys]);
echo '<script>alert("Item Removed")</script>';
echo '<script>window.location="addtocart.php"</script>';
}
}
}
}
?>
表格的HTML代码
<div class="container" style="width:700px;">
<div style="clear:both"></div>
<br />
<h3>Order Details</h3>
<div class="table-responsive">
<table class="table table-bordered">
<tr>
<th width="40%">Item Name</th>
<th width="10%">Quantity</th>
<th width="20%">Price</th>
<th width="15%">Total</th>
<th width="5%">Action</th>
</tr>
<?php
if(!empty($_SESSION["shopping_cart"]))
{
$total = 0;
foreach($_SESSION["shopping_cart"] as $keys => $values)
{
?>
<tr>
<td><?php echo $values["item_name"]; ?></td>
<td><?php echo $values["item_quantity"]; ?></td>
<td>Rs <?php echo $values["item_price"]; ?></td>
<td>Rs <?php echo
number_format($values["item_quantity"] * $values["item_price"], 2); ?>
</td>
<td><a href="addtocart.php?action=delete&id=<?php
echo $values["item_id"]; ?>"><span class="text-danger">Remove</span></a>
</td>
</tr>
<?php
$total = $total + ($values["item_quantity"]*$values["item_price"]);
}
?>
<tr>
<td colspan="3" align="right">Total</td>
<td align="right">Rs <?php echo
number_format($total, 2); ?></td>
<td></td>
</tr>
<?php
}
?>
</table>
</div>
</div>