英文:
Warning: session_encode(): Cannot encode non-existent session in site (Have started Session)
问题
我在一个php文件（Logit.php）中有以下代码，并从中调用下面的日志记录函数：
if (session_status() === PHP_SESSION_NONE) {
session_start();
}
function logging($string){
// 其他操作
$SESSIONData = session_encode(); // 字段长度：8192
// 其他操作
}
包含此日志记录脚本的php文件正在作为一个cron作业运行，有时我在命令行中运行它。我在我的Apache日志中收到以下错误：
警告：session_encode()：无法编码不存在的会话位于
/var/www/example.com/Logit.php
对于为什么会出现这个错误，有什么想法吗？我找到的与此错误相关的信息非常有限，也没有解决此问题的方法。在Stack Overflow上，我只找到了三个与之有关的问题，而且关联性很小。
英文:
I have the following code in a php file (Logit.php) and I call the logging function below from it:
if (session_status() === PHP_SESSION_NONE) {
session_start();
}
function logging($string){
// Other stuff
$SESSIONData = session_encode(); // Field Length: 8192
// Other stuff
}
The php file that includes this logging script is running as a cron job and sometimes I run it at the command line. I get the following error in my Apache logs:
> Warning: session_encode(): Cannot encode non-existent session in
> /var/www/example.com/Logit.php
Any thoughts on why, and how can I remove this error? Information related to this error is very sparse and doesn't address this issue. I got only three hits on SO that were even remotely related.
答案1
得分: 1
根据PHP文档，如果会话被禁用（在您的情况下，非Web服务器脚本很可能是这样），session_status() 可能会返回 PHP_SESSION_DISABLED。如果您的脚本在禁用会话的环境中运行，那么这正是您将获得的行为。session_start 没有被调用，因为 session_status() === PHP_SESSION_NONE 为假（所以您不会在这里得到错误），并且 session_encode() 在没有会话的情况下被调用（因为它们无法存在，因为被禁用了），导致错误。
英文:
According to the PHP docs, session_status() might return PHP_SESSION_DISABLED if sessions are disabled (which is likely for non-webserver scripts, as in your case). If your script is run in an environment with sessions disabled, this is exactly the behaviour you would get. session_start isn't called because session_status() === PHP_SESSION_NONE is false (so you don't get an error there), and session_encode() is called without a session (which can't exist anyway because they are disabled), resulting in an error
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