How to destroy a specific session?

Question

Here’s the thing: I have an application/game that uses sessions to memorize the data that users have chosen.

Whenever the user restarts the game I need to reset the information, so was using perfectly the

     session_destroy();

until I had to use

$_SESSION['email'] e $_SESSION['senha']

so that the user only had access to the game page if he was logged in.

So now if I use the

session_destroy();

sessions that keep the user logged in are also destroyed and he is redirected to the home page.

I tried to use

unset(); 

to empty only the sessions I need to restart, but then the system does not work properly. Sometimes I have to keep pressing the reset button several times...

Any suggestions?

Look what I’m doing:

      if ($_POST['entrada'] === "ex" ) //primeiro if
      {

          if(isset($_SESSION['palavra']))
           {
              unset($_SESSION['palavra']); 
           }

          if(isset($_SESSION['sessoes']))
          {
           unset($_SESSION['sessoes']); 
          }              
         if(isset($_SESSION['letra']))   
         {
          unset($_SESSION['letra']); 
         }


      }//fecha o primeiro if

Inside this main if are more than ten sessions to unsetar, I put only three to exemplify what I’m doing.

VAR DUMP no $_SESSION: array(13) { ["background"]=> string(5) "background" ["email"]=> string(25) "[email protected]" ["password"]=> string(8) "deusdeus" ["class"]=> string(7) "input" ["count"]=> int(3) ["pos"]=> int(0) ["pos_2"]=> int(2) ["error"]=> string(1) "v" ["erro_1"]=> string(1) "m" ["erro_2"]=> string(1) "w" ["erro_3"]=> string(1) "x" ["erro_4"]=> string(1) "z" ["erro_5"]=> string(1) "y" }

Answer 1

Updating

You can do subgroups in the session:

$_SESSION['login'] = array( 'email' => '[email protected]' , 'senha' => 'userpassword' );
$_SESSION['games'] = array( 'palavra' => 'Helicóptero' , 'letra' => 'a' );

Your session will be in 2 groups: login data(email, password), and game data(word, letter...)

[login] => Array('email' => '[email protected]' , 'senha' => 'userpassword')
[games] => Array('palavra' => 'Helicóptero' , 'letra' => 'a' )

You can remove a specific Intel from the games session using unset( $_SESSION['games']['palavra'] ) or to restart the game you remove the full session of the game using unset( $_SESSION['games'] ), this will keep the user session unchanged.

---

Removing indices from Session

Unset unlocked a session variable, while session_destroy() will destroy all sessions for the user.

unset( $_SESSION['palavra'] );  // irá remover apenas os dados de 'palavra'
session_destroy();  // irá remover todas as sessões do usuário.

---

I don’t know if it’ll satisfy your doubt, but I’m just a simple example...

// criando sessões de login
session_start();
$email = $_SESSION['email'];
$senha = $_SESSION['senha'];

// criando sessões do jogo
$senha = $_SESSION['palavra'];
$senha = $_SESSION['letra'];

// removendo todas as sessões
session_start();
session_destroy();
unset( $_SESSION );

// removendo sessões do jogo
// opção 1)
unset( $_SESSION['palavra'] );
unset( $_SESSION['senha'] );

// opção 2)
$_SESSION['palavra'] = null;
$_SESSION['senha'] = null;

Masta you use as condition in each Session you need to check.

Answer 2

You can do it like this:

session_start();
$tmpemail = $_SESSION['email'];
$tmpsenha = $_SESSION['senha'];
session_destroy();
session_start();
$_SESSION['email'] = $tmpemail;
$_SESSION['senha'] = $tmpsenha;