<?php require __DIR__.'/common.inc'; use Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage; $storage = new NativeSessionStorage(['cookie_samesite' => 'lax']); $storage->setSaveHandler(new TestSessionHandler()); $storage->start(); $_SESSION = ['foo' => 'bar']; $storage->regenerate(true); ob_start(fn ($buffer) => preg_replace('~_sf2_meta.*$~m', '', str_replace(session_id(), 'random_session_id', $buffer)));