PHP会话和表单输入名称变得混乱[关闭]

Question

我看到一些奇怪的行为：

我有 2 个会话设置了一些值：$_SESSION['shippingZip'] 和 $_SESSION['shippingOption']。

然后我的代码通过这段代码发布表单中发送的输入值：

$shippingOption = $_POST['shippingOption'];
Print_r ($_SESSION);
$shippingZip = $_POST['shippingZip'];

在此通道中，这些 POST 将变为空。但是，当它应该显示以前分配给它的字符串时，打印显示我的会话 $_SESSION['shippingOption'] 为空。 -------------------------- 发布完整的证明 会话加载了一些数据：

$_SESSION['shippingOption'] = $shippingOption;
$_SESSION['shippingZip']= $shippingZip;

然后：

Print_r ($_SESSION);
$shippingOption = $_POST['shippingOption'];
Print_r ($_SESSION);
$shippingZip = $_POST['shippingZip'];
Print_r ($_SESSION);

输出：

Array ( [itemAdded] => 1 [Payment_Amount] => 46.52 [cart] => Array ( [4] => Array ( [itemId] => 4 [qty] => 1 ) ) [shippingOption] => FIRST CLASS [shippingZip] => 10025 [shippingPrice] => 1.52 ) 
Array ( [itemAdded] => 1 [Payment_Amount] => 46.52 [cart] => Array ( [4] => Array ( [itemId] => 4 [qty] => 1 ) ) [shippingOption] => [shippingZip] => 10025 [shippingPrice] => 1.52 ) 
Array ( [itemAdded] => 1 [Payment_Amount] => 46.52 [cart] => Array ( [4] => Array ( [itemId] => 4 [qty] => 1 ) ) [shippingOption] => [shippingZip] => [shippingPrice] => 1.52 

您可以清楚地看到在每次 POST 之后，同名的 SESSION 是如何失去其价值的。太疯狂了！！！

Answer 1

$_POST 不直接填充$_SESSION。您需要将值分配给会话

即

$_SESSION['shippingOption'] = $_POST['shippingOption'];

编辑

在您发布更多代码后，您似乎没有在设置 $shippingOption; 之前定义它 $_SESSION['shippingOption'] = $shippingOption;

确保顺序如下：

$shippingOption = $_POST['shippingOption'];
$_SESSION['shippingOption'] = $shippingOption;