symfony用户访问网页的权限

Question

I want to make a certain twig input form on a web page available to user if he have a certain value in her database $row['GameId'];

so I tried to write if statement for the code like that

  $sqlo = $conn->query("SELECT * FROM user WHERE username='$tuser'");
  while ($row = $sqlo->fetch(PDO::FETCH_ASSOC))
  {
    $gid = $row['GameId'];

     if($gid == 0 ){
        $investor = $this->getDoctrine()->getRepository('AppBundle:User')->findOneBy(array('id' => $user->getId()));
        $MatchP = $investor->getMatchP();
        $form = $this->createForm(new TaskType(), $investor);

        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
             if(!empty($form->get('MatchP')->getData())){
                 $investor->setMatchP($form->get('MatchP')->getData());
             }
             else{
                 $investor->setMatchP($MatchP);
             }

             $em = $this->getDoctrine()->getManager();
             $em->persist($investor);
             $em->flush();

             $session = $this->getRequest()->getSession();


             /**
              * @Route("/siteblog_homepage/")
              */
            return $this->redirectToRoute('siteblog_homepage');
           }


     }
     else{

                ?> your value are not the right one to access to this page      <?

         }
     return $this->render('siteblogBundle:Default:index.html.twig', array(
         'form' => $form->createView(),
     ));        

    //}

}

but i get this error

Notice: Undefined variable: form

because this line

     'form' => $form->createView(),

so how to protect this page on the wright way ?

Answer 1

Firstable, you need to get outside from the while loop block, take a look :

 return $this->render('siteblogBundle:Default:index.html.twig', array(
         'form' => $form->createView(),
     )); 

Second :
You'r code can return 0 ,1 or many forms ,

while ($row = $sqlo->fetch(PDO::FETCH_ASSOC))
  {
    $gid = $row['GameId'];

     if($gid == 0 ){$form = $this->createForm(new TaskType(), $investor);
    /**/}

Take a look for every loop instruction you create a form so you don't know how many form you gonna build at the end because we dont know how many ($gid == 0 ) .
So i suggest to you that you render these all form to your view :

$forms = array();
array_push($forms,$form->createView());
return $this->render('siteblogBundle:Default:index.html.twig', array(
         'forms' => $forms));

By that way you pushed all your form into an array ,then all you need to do is to parse the array into your twig file:

{% for form in forms %}
    {{dump(form)}}
    {{form(form)}}
  {% endfor %}

wish i was helpful .