【发布时间】：2015-04-26 07:45:51
【问题描述】：
我创建了一个有效的购物车对象。但是当我尝试将对象保存到会话中时，存储了该对象的错误内容。正在保存的值是对象从购物车中清除后的值，空的。
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Testing the Shopping Cart</title>
</head>
<body>
<?php # cart.php
// This script uses the ShoppingCart and Item classes.
//error_reporting(0);
// Create the cart:
session_start();
try {
require('ShoppingCart.php');
require('userMenu.php');
$cart = new ShoppingCart();
// Create some items:
require('Item.php');
require ('Connect.php');
$conn=Connect::doConnect();
$query = "SELECT product_id, product_name, product_price from product";
$result = mysqli_query($conn, $query);
$i=0;
$w = array();
$new_cart;
if ($result->num_rows > 0) {
// output data of each row
echo '<table border='."1".'><form action="cart.php" method="post"><tr><td>';
echo '<b>'."Id produs".'</td><td><b>'."Denumire".'</td><td><b>'."Pret".'</td><td>'."Numar de bucati solicitate".'</td></tr><tr>';
while($row = $result->fetch_assoc()) {
echo '<td>'.$row["product_id"].'</td><td>'. $row["product_name"].'</td><td>'. $row["product_price"]. '</td><td>
<input type="input" value="0" name="quantity[]"><input type="hidden" value="'.$row["product_id"].'" name="item_adjust[]"></td>';
echo '</tr>';
$i++;
$w[$i]=new Item($row["product_id"], $row["product_name"],$row["product_price"]);
$cart->addItem($w[$i]);
//$cart->deleteItem($w[$i]);
}
echo '</td></tr><tr><td colspan="3"><input type="submit" value="Adauga in cosul de cumparaturi" name="adjQ"></td></tr></table>';
//foreach ()
} else {
echo "0 results";
}
$conn->close();
if($_POST["adjQ"]){
echo "In stoc avem ".$i." tipuri de produse";
// Update some quantities:
$cart_items_new = array_combine($_POST['item_adjust'],$_POST['quantity']);
foreach ($cart_items_new as $product_id=>$quantity){
//$item=new Item($product_id,Item->);
//Item $it;
//->updateItem($item->getId($product_id), $qty);
//$cart->updateItem(getId($product_id), $quantity);
$conn=Connect::doConnect();
$query1 = "SELECT product_id, product_name, product_price from product where
product_id='$product_id'";
$result1 = mysqli_query($conn, $query1);
$row1=mysqli_fetch_array($result1);
if($quantity>0){
$cart->updateItem($w[$product_id], $quantity);
echo $product_id.$quantity."+".$row1["product_name"];
}
else{
$cart->deleteItem($w[$product_id]);
}
}
// Show the cart contents:
echo '<h2>Continutul cosului de cumparaturi (' . count($cart) . ' tipuri de produse)</h2>';
echo "The user is " . $_SESSION["user"] . ".<br>";
echo "User type is " . $_SESSION["user_type"] . ".";
$new_cart = unserialize(serialize($cart));
if (!$cart->isEmpty()) {
foreach ($cart as $arr) {
// Get the item object:
$item = $arr['item'];
// Print the item:
printf('<p><strong>%s</strong>: %d @ $%0.2f bucata.<p>', $item->getName(), $arr['qty'], $item->getPrice());
} // End of foreach loop!
} // End of IF.
}
echo '</td></tr><tr><td colspan="2"><input type="submit" value="Salveaza" name="session"></td><td></td></tr></form></table>';
if ($_POST['session'])
{
echo "You entered the number ";
$serialize_cart=serialize($new_cart);
$_SESSION["cart"]=$serialize_cart;
}
}
catch (Exception $e) {
}
?>
</body>
</html>
当我按下第二个提交按钮时我做错了什么。
【问题讨论】：
-
我认为它与第二个提交按钮有关，当它按下它时会清除表单并将这些值存储到新的序列化对象中。
-
尝试使用 if (isset($_POST['session']))
-
不起作用。我收到错误：致命错误：在 ...\cart.php 中的非对象上调用成员函数 isEmpty()。在我调用第二个按钮之前，$new_cart 具有对应的对象 $cart 值。在我调用名为 session 的按钮后，$new_Cart 为空，不包含任何值。
标签： php session deep-copy storing-data