登錄表單顯示首次成功登錄

Question

他們的關鍵詞搜索毫無意義，我什么也找不到。 希望你們幫助我。 這是代碼：

<?php
    if(!isset($_SESSION['userid']))
    {
        include ("loginSection.php");
    }
    else
    {
        include ("loggedON.php");
    }
?>

它在我的標題中。 它可以正常工作，但問題是用戶名和密碼正確時，它會在第一次顯示表單時顯示“登錄成功”消息。 但導航后就可以了。 無論如何，在頁面加載之前有沒有在會話中檢查userid的方法，因此第一次不會顯示登錄表單？

 <?php
    if (!empty($_POST['userpassSubmit']))
    {
        $username = $_POST['username'];
        $password = $_POST['password'];

        $query = "SELECT id, username FROM users WHERE username = ? AND password = ? LIMIT 1";
        $statement = $databaseConnection->prepare($query);
        $statement->bind_param('ss', $username, $password);

        $statement->execute();
        $statement->store_result();

        if ($statement->num_rows == 1)
        {
            $statement->bind_result($_SESSION['userid'], $_SESSION['username']);
            $statement->fetch();
            echo "login successful";
        }
        else
        {
            echo "incorrect username password combination";
        }
    }        



    echo '
             <div class="row">
              <div class="col-sm-12 text-center">

                <form id="regForm" role="form" action='.$_SERVER['PHP_SELF'].' method="post" class="form-inline">
                    <div class="form-group">
                        <label for="username">username</label>
                        <input type="text" class="form-control" id="username" name="username"><br>
                    </div>
                    <div class="form-group">
                        <label for="password">password</label>
                        <input type="password" class="form-control" id="password" name="password"><br>
                    </div>
                    <input name="userpassSubmit" class="btn btn-default" type="submit" value="login">
                </form>

              </div>
         </div>';
?>

Answer 1

您需要創建注銷頁面或清除cookie才能顯示您的登錄頁面。 在注銷頁面中，您需要銷毀或取消設置會話。

**logout.php**

session_start();

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

Answer 2

對不起

我認為以下代碼已添加到您的loginSection.php頁面

<?php
  session_start();

  if(isset($_SESSION['userid']))
  {

?>

  <script>

    window.location.href='loggedON.php';

  </script>

<?php

  }

    if (!empty($_POST['userpassSubmit']))
    {
        $username = $_POST['username'];
        $password = $_POST['password'];

        $query = "SELECT id, username FROM users WHERE username = ? AND password = ? LIMIT 1";
        $statement = $databaseConnection->prepare($query);
        $statement->bind_param('ss', $username, $password);

        $statement->execute();
        $statement->store_result();

        if ($statement->num_rows == 1)
        {
            $statement->bind_result($_SESSION['userid'], $_SESSION['username']);
            $statement->fetch();
            echo "login successful";
        }
        else
        {
            echo "incorrect username password combination";
        }
    }        



    echo '
             <div class="row">
              <div class="col-sm-12 text-center">

                <form id="regForm" role="form" action='.$_SERVER['PHP_SELF'].' method="post" class="form-inline">
                    <div class="form-group">
                        <label for="username">username</label>
                        <input type="text" class="form-control" id="username" name="username"><br>
                    </div>
                    <div class="form-group">
                        <label for="password">password</label>
                        <input type="password" class="form-control" id="password" name="password"><br>
                    </div>
                    <input name="userpassSubmit" class="btn btn-default" type="submit" value="login">
                </form>

              </div>
         </div>';
?>