Question

如何在不破坏会话变量的情况下取消设置会话变量，以便再次使用

<?php 
ini_set('display_errors', 0);
session_start();

     if(isset($_SESSION['username'])) 
      {
        if(isset($_POST['logout'])){

          session_unset();
          unset($_SESSION['username']);
          unset($_SESSION['password']);
          header('location:index.php');
        }

        if(isset($_POST['unset'])){
          session_destroy();
          header('location:registration.php');
        }
?>
<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">

    <h1>Welcome</h1>

      <form action="" method="post">
      <input type="submit" name="logout" value="logout" class="btn btn-danger">
      <input type="submit" name="unset" value="remove user" class="btn btn-danger">

      </form>    


    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
  </body>
</html>

<?php
}
else{
  echo "not login";
}
?>

这里有注销按钮，只想取消设置会话变量，以便可以在login.php中再次使用会话变量。

PS：我不想使用数据库。

Answer 1

您可以

<?php 
     if(isset($_POST['unset'])){
         //removes all the current variables in the 
         //session and re-initializes them to nothing or null
         $_SESSION = array();

         //or
         //for each variable in your session unset like - to remove single values.
         unset($_SESSION["username"]);
     }
?>

如何取消设置会话而不破坏？

1 个答案: