note 110969 modified in function.session-unset by danbrown
| From: | danbrown@php.net | Date: | Thu, 17 Jan 2013 15:27:51 +0000 |
| Subject: | note 110969 modified in function.session-unset by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-193150@lists.php.net to get a copy of this message | ||
There is nothing magical about the $_SESSION superglobal and unsetting it.
One has simply to remember that all the session_* functions will use continue to
use exactly that instance of array that was set up by session_start.
Consider this example:
<?php
session_start();
var_dump($_SESSION);
$a =& $_SESSION;
unset($_SESSION);
$a['x'] = 1; // $a refers to the original $_SESSION
$_SESSION['x'] = 2; // new unrelated array
session_write_close();
// saved session contains x => 1
?>
--was--
There is nothing magical about the $_SESSION superglobal and unsetting it.
One has simply to remember that all the session_* functions will use continue to
use exactly that instance of array that was set up by session_start.
Consider this example:
<?php
session_start();
var_dump($_SESSION);
$a =& $_SESSION;
unset($_SESSION);
$a['x'] = 1; // $a refers to the original $_SESSION
$_SESSION['x'] = 2; // new unrelated array
session_write_close();
// saved session contains x => 1
http://php.net/manual/en/function.session-unset.php