php 未定义变量：$_SESSION
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Undefined variable: $_SESSION
提问by Ian Hunter
I'm getting E_NOTICEerrors in a core CakePHP file when it tries to reference a never-set or unset session (cake/libs/cake_session.php line 372):
我E_NOTICE在核心 CakePHP 文件中尝试引用从未设置或未设置的会话 ( cake/libs/cake_session.php line 372) 时出现错误：
function read($name = null) {
if (is_null($name)) {
return $this->__returnSessionVars();
}
if (empty($name)) {
return false;
}
$result = Set::classicExtract($_SESSION, $name);
}
I've done a search through my code (in the app/ directory) and I can't find references to $_SESSIONor session_destroy. Am I missing anything?
我已经搜索了我的代码（在 app/ 目录中），但找不到对$_SESSION或 的引用session_destroy。我错过了什么吗？
This error shows up when I try to run any unit tests. Is this...normal? I've cleared out the cake/directory and replaced it with another one (same version) just to make sure that I hadn't inadvertently modified anything in the core files, but I still get the same error. I'm not sure if this is just a flaw in the framework or something else.
当我尝试运行任何单元测试时会出现此错误。这……正常吗？我已经清除了cake/目录并将其替换为另一个（相同版本），以确保我没有无意中修改了核心文件中的任何内容，但我仍然遇到相同的错误。我不确定这是否只是框架或其他方面的缺陷。
EDIT
编辑
Here are the results of the test run on the command line:
以下是在命令行上测试运行的结果：
Welcome to CakePHP v1.3.11 Console
---------------------------------------------------------------
App : app
Path: /var/www/program/app
---------------------------------------------------------------
CakePHP Test Shell
---------------------------------------------------------------
Running app case models/owners_equity
E_NOTICE: Undefined variable: _SESSION in /var/www/program/cake/libs/cake_session.php on line 372
E_NOTICE: Undefined variable: _SESSION in /var/www/program/cake/libs/cake_session.php on line 372
ERROR->Unexpected PHP error [Undefined variable: _SESSION] severity [E_NOTICE] in [/var/www/program/cake/libs/cake_session.php line 372]
in testGenerateOwnerWithdrawals
in BalanceTestCase
in /var/www/program/app/tests/cases/models/owners_equity.test.php
ERROR->Unexpected PHP error [Undefined variable: _SESSION] severity [E_NOTICE] in [/var/www/program/cake/libs/cake_session.php line 372]
in testGenerateOwnerWithdrawals
in BalanceTestCase
in /var/www/program/app/tests/cases/models/owners_equity.test.php
采纳答案by Ian Hunter
Turned out there was some extra code in the AppModel that was messing things up:
结果发现 AppModel 中有一些额外的代码把事情搞砸了：
in beforeFindand afterFind:
在beforeFind和afterFind：
App::Import("Session");
$session = new CakeSession();
$sim_id = $session->read("Simulation.id");
I don't know why, but that was what the problem was. Removing those lines fixed the issue I was having.
我不知道为什么，但这就是问题所在。删除这些行解决了我遇到的问题。
回答by Ghostman
You need make sure to start the session at the top of every PHP file where you want to use the $_SESSIONsuperglobal. Like this:
您需要确保在要使用$_SESSION超全局变量的每个 PHP 文件的顶部启动会话。像这样：
<?php
session_start();
echo $_SESSION['youritem'];
?>
You forgot the Session HELPER.
你忘记了会话助手。
Check this link : book.cakephp.org/2.0/en/core-libraries/helpers/session.html
检查此链接：book.cakephp.org/2.0/en/core-libraries/helpers/session.html
