php - session 变量似乎没有保存

Question

非常简单的代码:

<?
session_start();
$_SESSION['t'.time()]     = "ok";
echo "<pre>".print_r($_SESSION, 1)."</pre>";
?>

如预期的那样显示类似

Array
(
    [t1330966834] => ok
    [t1330966835] => ok
    [t1330966836] => ok
)

3 页重新加载后。

让我们改变一些符号:

$_SESSION[time()]     = "ok";

(现在没有't')并且我希望在几次重新加载之后像

Array
(
    [t1330966834] => ok
    [t1330966835] => ok
    [t1330966836] => ok
    [1330967020] => ok
    [1330967021] => ok
    [1330967022] => ok
    [1330967023] => ok
)

但实际上结果是完全不同的:

   Array
    (
        [t1330966834] => ok
        [t1330966835] => ok
        [t1330966836] => ok
        [1330967020] => ok
    )

我们有 3 个先前的数组单元格和一个且只有一个“时间”单元格 - 无论您重新加载页面多少次。时间是正确的，每一秒都不同，但只有一个单元格没有“t”!我也试过了

$t =time();
$_SESSION[$t]     = "ok";

甚至

$t =intval(time());
$_SESSION[$t]     = "ok";

但随着时间的推移它仍然只有一个细胞。

在 2 个不同的服务器上测试 php 5.2.13 和 5.3.10。我做错了什么？

Answer 1

The keys in the $_SESSION associative array are subject to the same limitations as regular variable names in PHP, i.e. they cannot start with a number and must start with a letter or underscore. For more details see the section on variables in this manual.

http://php.net/manual/en/session.examples.basic.php