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(PHP 4, PHP 5)
session_destroy — Destrói todos os dados registrados em uma sessão
session_destroy() destrói todos os dados associados com a sessão atual. Ela não desregistra nenhuma das variáveis globais associadas a sessão atual, nem desregistra o cookie de sessão.
Para poder matar a sessão junto, como para fazer o log out do usuário, o id da sessão também deve ser desregistrado. Se for usado um cookie para propagar o id de sessão (funcionamento padrão), então o cookie de sessão deve ser excluído. setcookie() pode ser usado para isso.
Retorna TRUE em caso de sucesso ou FALSE em falhas.
Exemplo #1 Destruindo uma sessão com $_SESSION
<?php
// Initialize the session.
// If you are using session_name("something"), don't forget it now!
session_start();
// Unset all of the session variables.
$_SESSION = array();
// If it's desired to kill the session, also delete the session cookie.
// Note: This will destroy the session, and not just the session data!
if (isset($_COOKIE[session_name()])) {
setcookie(session_name(), '', time()-42000, '/');
}
// Finally, destroy the session.
session_destroy();
?>
Nota: Apenas use session_unset() para código antigo obsoleto que não use $_SESSION.
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