Unexpected Output When Using Custom Session Handler with PHP 8.1
I'm sure I'm missing something obvious here, but I am implementing a custom session handler in PHP 8.1 using `session_set_save_handler()`, but I am experiencing unexpected behavior with session data not being saved correctly. I have a class that implements the `SessionHandlerInterface` and overrides the required methods, but when I try to use `$_SESSION` to store data, it seems to be empty after the first request. Here is the relevant part of my code: ```php class MySessionHandler implements SessionHandlerInterface { public function open($savePath, $sessionName) { // Custom open logic return true; } public function close() { // Custom close logic return true; } public function read($id) { // Read session data from storage return ''; } public function write($id, $data) { // Write session data to storage return true; } public function destroy($id) { // Logic to destroy a session return true; } public function gc($maxlifetime) { // Garbage collection logic return true; } } $handler = new MySessionHandler(); session_set_save_handler($handler, true); session_start(); $_SESSION['user'] = 'JohnDoe'; ``` After setting a session variable, I navigate to another page and attempt to access `$_SESSION`. However, it seems that the session is not persisting, and thus `$_SESSION['user']` is empty. I've checked to ensure that the session ID is not changing between requests. I've also tried to implement logging in the `write` and `read` methods to verify that they are being called, and they are, but the data being read is always empty. I suspect there might be a question with the `write` method, but I'm not sure what I might be missing. Can anyone help identify what could be going wrong? Is there something specific I should be aware of when implementing custom session handlers in PHP 8.1?