会话不适用于MAMP

Question

When i try to run my site on localhost i get an error: 当我尝试在localhost上运行我的网站时，出现错误：

Undefined index: log in ... on line 137

Within this file there is a line: 在此文件中有一行：

if (!$_SESSION['log']) { ...

Everything works on server, but not on localhost. 一切都可以在服务器上运行，但不能在本地主机上运行。 What can I do to fix it? 我该如何解决？

Answer 1

There is probably a difference between the level of error reporting between the server and your local setup. 服务器与本地设置之间的错误报告级别可能有所不同。

If you want to check if the variable is set (assuming that a session has been started...), you should use: 如果要检查是否设置了变量（假设会话已启动...），则应使用：

if (!isset($_SESSION['log'])) {

Or if you want to check if it is not set and / or empty or false : 或者，如果您要检查它是否未设置和/或为空或为false ：

if (empty($_SESSION['log'])) {

Both will not generate any warnings for non-set variables or array indices. 两者都不会对未设置的变量或数组索引生成任何警告。

Answer 2

It probably isn't working "on server," but is instead just not showing the error message to the page. 它可能无法在“服务器上”工作，但只是没有在页面上显示错误消息。

You can fix the warning re: the index by changing your if statement to this: 您可以通过将if语句更改为此来修复警告：索引：

if (isset($_SESSION['log']) && !$_SESSION['log']) {

Or to whatever condition you need it to be. 或无论您需要什么条件。