<?php

// Custom session handler defined BEFORE the worker loop

class PreLoopSessionHandler implements SessionHandlerInterface

{

private static array $data = [];

public function open(string $path, string $name): bool

{

return true;

}

public function close(): bool

{

return true;

}

public function read(string $id): string|false

{

return self::$data[$id] ?? '';

}

public function write(string $id, string $data): bool

{

self::$data[$id] = $data;

return true;

}

public function destroy(string $id): bool

{

unset(self::$data[$id]);

return true;

}

public function gc(int $max_lifetime): int|false

{

return 0;

}

}

// Set the session handler BEFORE the worker loop

$handler = new PreLoopSessionHandler();

session_set_save_handler($handler, true);

$requestCount = 0;

do {

$ok = frankenphp_handle_request(function () use (&$requestCount): void {

$requestCount++;

$output = [];

$output[] = "request=$requestCount";

$action = $_GET['action'] ?? 'check';

switch ($action) {

case 'use_session':

// Try to use the session - should work with pre-loop handler

$error = null;

set_error_handler(function ($errno, $errstr) use (&$error) {

$error = $errstr;

return true;

});

try {

session_id('test-preloop-' . $requestCount);

$result = session_start();

if ($result) {

$_SESSION['test'] = 'value-' . $requestCount;

session_write_close();

$output[] = "SESSION_OK";

} else {

$output[] = "SESSION_START_FAILED";

}

} catch (Throwable $e) {

$output[] = "EXCEPTION:" . $e->getMessage();

}

restore_error_handler();

if ($error) {

$output[] = "ERROR:" . $error;

}

break;

case 'check':

default:

$saveHandler = ini_get('session.save_handler');

$output[] = "save_handler=$saveHandler";

if ($saveHandler === 'user') {

$output[] = "HANDLER_PRESERVED";

} else {

$output[] = "HANDLER_LOST";

}

}

echo implode("\n", $output);

});

} while ($ok);