👀 Views: 82 💬 Answers: 1 📅 Created: 2025-06-09

php session pdo custom-session-handler PHP

I've hit a wall trying to I'm writing unit tests and I'm experiencing an issue where session data is not persisting across multiple requests in my PHP 8.1 application..... I'm using a custom session handler with `session_set_save_handler()` to store session data in my MySQL database. However, after setting a session variable, it seems to be lost on the next request. Here's a simplified version of my session handler implementation: ```php class MySessionHandler implements SessionHandlerInterface { private $pdo; public function __construct($pdo) { $this->pdo = $pdo; } public function open($savePath, $sessionName) { return true; } public function close() { return true; } public function read($sessionId) { $stmt = $this->pdo->prepare("SELECT session_data FROM sessions WHERE session_id = :session_id"); $stmt->execute([':session_id' => $sessionId]); $data = $stmt->fetchColumn(); return $data ? $data : ""; } public function write($sessionId, $data) { $stmt = $this->pdo->prepare("REPLACE INTO sessions (session_id, session_data) VALUES (:session_id, :session_data)"); return $stmt->execute([':session_id' => $sessionId, ':session_data' => $data]); } public function destroy($sessionId) { $stmt = $this->pdo->prepare("DELETE FROM sessions WHERE session_id = :session_id"); return $stmt->execute([':session_id' => $sessionId]); } public function gc($maxlifetime) { $stmt = $this->pdo->prepare("DELETE FROM sessions WHERE last_updated < :time"); return $stmt->execute([':time' => time() - $maxlifetime]); } } ``` I've registered the session handler like this: ```php $pdo = new PDO('mysql:host=localhost;dbname=test', 'user', 'password'); $handler = new MySessionHandler($pdo); session_set_save_handler($handler, true); session_start(); ``` After starting the session, I set a session variable: ```php $_SESSION['user_id'] = 42; ``` However, when I try to access `$_SESSION['user_id']` on subsequent requests, it returns `NULL`. I've checked the database, and the session data seems to be stored correctly, but it doesn't seem to be reading it back properly. I've also ensured that the session ID is consistent across requests by checking `session_id()`. Is there something I'm missing here? Could it be related to PHP's session cookie settings or something in the way I'm handling the session lifecycle? Any insights would be appreciated. I recently upgraded to Php 3.9. What would be the recommended way to handle this? Has anyone dealt with something similar? I'm coming from a different tech stack and learning Php.