PHP会话和表单输入名称变得混乱

Question

我看到一些奇怪的行为：

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

然后我的代码通过此代码发布以表单形式发送的输入值：

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

这个帖子中的帖子空了。但是，Print显示我的会话$ _SESSION ['shippingOption']为空，它应显示先前已分配给它的字符串。 --------------------------张贴全部证明 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 

您可以清楚地看到每次POST后，具有相同名称的SESSION失去其值。这太疯狂了!!!

Answer 1

$_POST未直接填充$_SESSION。您需要将值分配给会话

即

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

修改

发布更多代码后，在设置$shippingOption;之前，您似乎没有定义$_SESSION['shippingOption'] = $shippingOption;

确保订单如下：

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