还记得跨页的字段吗？

#page1
session_start();
$_SESSION[\'foo\'] = \'bar\';

#page2
session_start();
echo $_SESSION[\'foo\'] #echoes bar

unset($_SESSION[\'foo\']); #destroy foo
#if you want to discard the entire session, use
session_destroy(); #going down! 

#main.php
session_start();
if (isset($_POST[\'id\'], $_POST[\'password\'])) {
    $_SESSION[\'id\'] = $_POST[\'id\'];
    $_SESSION[\'password\'] = $_POST[\'password\'];
}
#rest of main.php

#console.php and plugins.php
session_start();
if (isset($_SESSION[\'id\'], $_SESSION[\'password\']))
    #do stuff

action