PHP会话不可写时抛出错误？

Question

Is there a way to detect and throw an error if PHP session is not writable?

In a large code base, it can be difficult to know if session_write_close() was called prior to a session changing code. And when you think you are updating the session, it might be actually not writable, and this can go unnoticed.

Answer 1

You can check for the status of the session.

if (session_status() !== PHP_SESSION_ACTIVE) {
    //PHP 7
    throw new Error();
   }

After session_write_close() has been called the status would be PHP_SESSION_NONE