1

我已经在 php 中编写了登录和注销脚本。我可以登录但注销不起作用。有人请指出错误。我完全迷路了。这是完整的代码。

1.登录php代码：

    <?php
session_start();
require_once('login/connectvars.php');
$msg = "";

if(!isset($_SESSION['username']) && isset($_COOKIE['username']))
{
    $_SESSION['username'] = $_COOKIE['username'];
}

if(isset($_POST['submit']))
{
    $dbc = mysqli_connect(DB_HOST,DB_USER,DB_PASSWORD,DB_NAME);
    $username = mysqli_real_escape_string($dbc,trim($_POST['username']));
    $password = mysqli_real_escape_string($dbc,trim($_POST['password']));

    if(!empty($username) && !empty($password))
    {
        $query = "SELECT username FROM users_dns WHERE username = '$username' AND password = SHA('$password')";
        $data = mysqli_query($dbc,$query) or die(mysqli_error($dbc));

        if(mysqli_num_rows($data) == 1)
        {
            $row = mysqli_fetch_array($data);
            $_SESSION['username'] = $row['username'];
            setcookie('username',$row['username'],time()+(60*6));
            $msg = 'success';
        }
        else
        {
            $msg = 'enter correct values..';
        }
    }
    else
    {
        $msg = 'Enter all fields..';
    }
}

?>

2.我在 HTML 中用于检查会话的代码。

   <div id="login_form">
          <h2>
            <?php echo $msg; ?>
          </h2>
       <?php
       if(isset($_SESSION['username']))
        {
            echo 'nothing<br />';
            echo '<a href="login/logout.php">log out'.$_SESSION['username'].'</a><br />';
        }
        else
        {
       ?>
         <form id="login"  method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
            <table>
                  <tr>
                     <th>Username:</th>
                     <th>Password:</th>
                  </tr>
                  <tr>
                     <td><input type="text" name="username" /></td>
                     <td><input type="password" name="password" /></td>
                   </tr>
                   <tr>
                      <td><input type="submit" name="submit" value="Log In" class="submit" /></td>
                      <td><a href="login/signup.php"><input type="button" class="submit" value="Sign Up" /></a></td>
                   </tr>
            </table>
         </form>
         <?php
         }
         ?>
    <!-- login form -->

   </div>

3.注销脚本

    <?php
session_start();

if(isset($_SESSION['username']))
{
    $_SESSION = array();

    if(isset($_COOKIE[session_name()]))
    {
        setcookie(session_name(),'',time() - 3600);
    }
    session_destroy();
}

setcookie('username','',time() - 3600);

echo 'redirecting you...please wait..';
header("Refresh: 3;url=http://localhost/");
?>
4

2 回答 2

3

尝试删除所有 cookie。

<?php

if (isset($_SERVER['HTTP_COOKIE']))
{
    $cookies = explode(';', $_SERVER['HTTP_COOKIE']);
    foreach($cookies as $cookie)
    {
        $mainCookies = explode('=', $cookie);
        $name = trim($mainCookies[0]);
        setcookie($name, '', time()-1000);
        setcookie($name, '', time()-1000, '/');
    }
}

并且session您需要了解更多关于ob_start(); and ob_flush();. 干杯。

于 2013-01-25T08:24:10.287 回答
0

对于注销只需使用：

session_destroy();
header('Location: index.php'); // file name where you want to redirect after logout
exit();
于 2013-01-25T08:13:09.607 回答