Symfony 表单无法启动会话：PHP 已启动

Question

我收到错误 无法启动会话：在向 Twig 发送表单视图时已由 PHP. 启动。我不知道为什么，我想知道。

动作

public function indexAction(Request $request) {

    $em = $this->getDoctrine()->getManager();

    $uploadFormType = new \phpUploadFileTest\phpUploadFileTestBundle\Form\UploadType();
    $uploadEntity= new \phpUploadFileTest\phpUploadFileTestBundle\Entity\Upload();
    $uploadForm = $this->createForm($uploadFormType, $uploadEntity );
    $uploadForm->handleRequest($request);


    if($uploadForm->isSubmitted() && $uploadForm->isValid()){



        $em->persist($uploadEntity);
        $em->flush();


    }
    return $this->render("phpUploadFileTestphpUploadFileTestBundle::index.html.twig", array("uploadForm" => $uploadForm->createView()));

}

错误发生在代码$uploadForm->createView()。当我删除它时，我没有收到该错误。

\phpUploadFileTest\phpUploadFileTestBundle\Form\UploadType->buildForm代码：

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder->add('name', "text",[])->add('file', "text",[]);
}

当我禁用表单上的 CSRF 并设置 "csrf_protection"=>false 时，该错误已修复。但我不想禁用 csrf 保护。

我不知道会话管理。但是 vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php at line 132:

抛出的错误

if (PHP_VERSION_ID >= 50400 && \PHP_SESSION_ACTIVE === session_status()) {
        throw new \RuntimeException('Failed to start the session: already started by PHP.');
    }

来自 /home/guervyl/NetBeansProjects/gvwb/website-creator-symfony/vendor/symfony/symfony/src/Symfony/Component/Security/Csrf/TokenStorage/SessionTokenStorage.php 第 90 行：

public function hasToken($tokenId)
{
    if (!$this->session->isStarted()) {
        **$this->session->start();**
    }
    return $this->session->has($this->namespace.'/'.$tokenId);

我创建了一个自定义 app_dev.php。在其中我开始了一个会话。我使用了 legacy session and session，但仍然出现该错误。

use Symfony\Component\HttpFoundation\Session\Session;
use Symfony\Component\HttpFoundation\Session\Storage\PhpBridgeSessionStorage;

// legacy application configures session
ini_set('session.save_handler', 'files');
ini_set('session.save_path', '/tmp');
session_start();

// Get Symfony to interface with this existing session
$session = new Session(new PhpBridgeSessionStorage());
$session->start();

...
$session->set(...);
...
$session->has(...);
...
$session->get(...);

我的 Symfony 版本是 2.8.20（我知道它很旧）

Answer 1

我通过将 storage_id: session.storage.php_bridge 添加到我的 config.yml 下修复了它：

framework:
    session: { handler_id: null, storage_id: session.storage.php_bridge}

然后在我的 php 文件中使用 Symfony Session class:

use Symfony\Component\HttpFoundation\Session\Session;
use Symfony\Component\HttpFoundation\Session\Storage\PhpBridgeSessionStorage;

// legacy application configures session
ini_set('session.save_handler', 'files');
ini_set('session.save_path', '/tmp');
session_start();

// Get Symfony to interface with this existing session
$session = new Session(new PhpBridgeSessionStorage());
$session->start();

...
$session->set(...);
...
$session->has(...);
...
$session->get(...);

来自there then there

Symfony 表单无法启动会话：PHP 已启动

Symfony form Failed to start the session: already started by PHP

php

symfony

symfony-2.8