我做了一个代码，在会话中添加了商品ID，但是根本不需要，这是代码。
$my_array=array($_SESSION['buyid']);
array_push($my_array, $id);
// put the array in a session variable
$_SESSION['buyid'] = $my_array;
但以这种方式打印$ _session变量：
$orderamount = $_SESSION['amount'];
for ($i=1;$i<$orderamount;$i++){
$order = $_SESSION[$i]['buyid'];
print "<pre>";
print_r($_SESSION[$i]['buyid']);
print "</pre>";
输出：
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] =>
[1] => 14
)
[1] => 15
)
[1] => 7
)
[1] => 8
)
[1] => 9
)
[1] => 10
)
[1] => 11
)
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] =>
[1] => 14
)
[1] => 15
)
[1] => 7
)
[1] => 8
)
[1] => 9
)
[1] => 10
)
[1] => 11
)
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] =>
[1] => 14
)
[1] => 15
)
[1] => 7
)
[1] => 8
)
[1] => 9
)
[1] => 10
)
[1] => 11
)
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] =>
[1] => 14
)
[1] => 15
)
[1] => 7
)
[1] => 8
)
[1] => 9
)
[1] => 10
)
[1] => 11
)
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] =>
[1] => 14
)
[1] => 15
)
[1] => 7
)
[1] => 8
)
[1] => 9
)
[1] => 10
)
[1] => 11
)
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] =>
[1] => 14
)
[1] => 15
)
[1] => 7
)
[1] => 8
)
[1] => 9
)
[1] => 10
)
[1] => 11
)
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] =>
[1] => 14
)
[1] => 15
)
[1] => 7
)
[1] => 8
)
[1] => 9
)
[1] => 10
)
[1] => 11
)
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] =>
[1] => 14
)
[1] => 15
)
[1] => 7
)
[1] => 8
)
[1] => 9
)
[1] => 10
)
[1] => 11
)
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] =>
[1] => 14
)
[1] => 15
)
[1] => 7
)
[1] => 8
)
[1] => 9
)
[1] => 10
)
[1] => 11
)
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] =>
[1] => 14
)
[1] => 15
)
[1] => 7
)
[1] => 8
)
[1] => 9
)
[1] => 10
)
[1] => 11
)
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[0] =>
[1] => 14
)
[1] => 15
)
[1] => 7
)
[1] => 8
)
[1] => 9
)
[1] => 10
)
[1] => 11
)
我认为有一些问题，我需要在正常的数组中知道，以便制作结帐页面，将数据插入到mysql中并进行数学计算和其他检查，但我无法从数组中选择变量。< / p>
答案 0 :(得分：0)
问题在于$_SESSION[$i]，尽管$ _SESSION就像普通数组一样，使用int键迭代它并不是一个好主意。
我假设您要将买家ID添加到会话中，因此代码应如下所示：
// create buyId if it doesn't exist the better name would be "customersIds"
if (!is_array($_SESSION['buyid'])) {
$_SESSION['buyid'] = [];
}
// assuming that $id is passed somehow to this script when it's not empty add it to array, acts like array_push()
if (!empty($id)) {
$_SESSION['buyid'][] = $id;
}
它将添加到关键'buyId'下一个ID下的$ _SESSION。如果你想要它们是唯一的，你可以在添加in_array（）之前检查，如果id已经存在。
然后，如果您想从会话中获取所有买家ID。
// iterate over array in session and display buyIds
foreach ($_SESSION['buyid'] as $buyId) {
echo $buyId;
}