Symfony:在操作之间传递参数(使用重定向)

composer require symfony/http-foundation

public function firstAction(Request $request)
{
    // Get the session object and the flash bag
    $session = $request->getSession();
    $flashBag = $session->getFlashBag();

    // Add a message to the flash bag
    $flashBag->add('success', 'This is a success message!');

    // Redirect to the second action
    return $this->redirectToRoute('second_action');
}

public function secondAction(Request $request)
{
    // Get the session object and the flash bag
    $session = $request->getSession();
    $flashBag = $session->getFlashBag();

    // Get the messages from the flash bag
    $successMessages = $flashBag->get('success');

    // Render the second template with the messages
    return $this->render('second.html.twig', [
        'successMessages' => $successMessages,
    ]);
}

{% for message in successMessages %}
    <div class="alert alert-success">{{ message }}</div>
{% endfor %}