| 
<?php
 require __DIR__.'/common.inc';
 
 use Symfony\Component\HttpFoundation\Session\Flash\FlashBag;
 use Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage;
 
 $storage = new NativeSessionStorage();
 $storage->setSaveHandler(new TestSessionHandler());
 $flash = new FlashBag();
 $storage->registerBag($flash);
 $storage->start();
 
 $flash->add('foo', 'bar');
 
 print_r($flash->get('foo'));
 echo empty($_SESSION) ? '$_SESSION is empty' : '$_SESSION is not empty';
 echo "\n";
 
 $storage->save();
 
 echo empty($_SESSION) ? '$_SESSION is empty' : '$_SESSION is not empty';
 
 ob_start(function ($buffer) { return str_replace(session_id(), 'random_session_id', $buffer); });
 
 |