登陆小demo 

<?php
if( isset($_COOKIE['username']) && isset($_COOKIE['auth'])){
$arr = explode(':',$_COOKIE['auth']);
$id = end($arr);
$link = mysqli_connect('127.0.0.1','root','root','xmz',8889) or die("连接失败");
mysqli_set_charset($link,'utf8');

$sql = "select id,username,password from member where id ={$id} ";
$res = mysqli_query($link,$sql);
if(mysqli_num_rows($res)){
    $row = mysqli_fetch_assoc($res);

    $authStr = md5($row['username'].$row['password'].'xmz').":".$id;

    if($authStr == $_COOKIE['auth']){
        exit("<script>
alert('正在登陆中，请稍后');
location.href = 'shouye.php';
</script>");
    }

}}
?>

<!doctype html>
<html lang="en">
<head>
    <title>Bootstrap 实例</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">
    <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
    <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column">
            <h3 class="text-center">
                登陆页面
            </h3>
            <form role="form" method="post" action="doLogin.php">
                <div class="form-group">
                    <label for="exampleInputEmail1">请输入用户名</label><input type="text" class="form-control" id="username" name="username" />
                </div>
                <div class="form-group">
                    <label for="exampleInputPassword1">请输入密码</label><input type="password" class="form-control" id="password"  name="password"/>
                </div>

                <div class="checkbox">
                    <label><input type="checkbox"  name="autoLogin" value="1"/>一周内自动登陆</label>
                </div> <button type="submit" class="btn btn-default">登陆</button>
            </form>
        </div>
    </div>
</div>
</body>
</html>

　　

<?php
$username = $_POST['username'];
$password = md5($_POST['password']);
$autoLogin = isset($_POST['autoLogin'])?1:0;
$link = mysqli_connect('127.0.0.1','root','root','xmz',8889) or die("数据库连接失败");
mysqli_set_charset($link,'utf8');
$sql = "SELECT id,username, password FROM member WHERE username = '{$username}' and password = '{$password}'";

 $res = mysqli_query($link,$sql);
 $num = mysqli_num_rows($res);

  if($num){
     $row =  mysqli_fetch_assoc($res);
     if($autoLogin == 1){
         setcookie('username',$username,strtotime('+7 days'));
         $salt = 'xmz';
         $auth = md5($username.$password.$salt).":".$row['id'];
         setcookie('auth',$auth,strtotime('+7 days'));
         exit("<script>
alert('登陆成功');
location.href = 'shouye.php';
</script>");
     }else{
         setcookie('username',$username);
         $salt = 'xmz';
         $auth = md5($username.$password.$salt).":".$row['id'];
         setcookie('auth',$auth);
         exit("<script>
alert('登陆成功');
location.href = 'shouye.php';
</script>");
     }

  }else{
      exit("<script>
alert('密码错误');
location.href = 'login.php';
</script>");
  }

　　

<?php
  if(!isset($_COOKIE['username']) && (!isset($_COOKIE['auth']))){
      exit("<script>
alert('请先登陆');
location.href = 'login.php';
</script>");
  }
  $arr = explode(':',$_COOKIE['auth']);
  $id = end($arr);
  $link = mysqli_connect('127.0.0.1','root','root','xmz',8889) or die("连接失败");
  mysqli_set_charset($link,'utf8');

  $sql = "select id,username,password from member where id ={$id} ";
  $res = mysqli_query($link,$sql);
  if(mysqli_num_rows($res)){
       $row = mysqli_fetch_assoc($res);

       $authStr = md5($row['username'].$row['password'].'xmz').":".$id;

       if($authStr != $_COOKIE['auth']){
           exit("<script>
alert('校验失败');
location.href = 'login.php';
</script>");
       }
  }else{
      exit("<script>
alert('请先登陆');
location.href = 'login.php';
</script>");
  }
?>
<!doctype html>
<html lang="en">
<head>
    <title>Bootstrap 实例</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">
    <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
    <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body><div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column">
            <nav class="navbar navbar-default" role="navigation">
                <div class="navbar-header">
                    <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"> <span class="sr-only">Toggle navigation</span><span class="icon-bar"></span><span class="icon-bar"></span><span class="icon-bar"></span></button> <a class="navbar-brand" href="#">Brand</a>
                </div>

                <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
                    <ul class="nav navbar-nav">
                        <li class="active">
                            <a href="#">Link2</a>
                        </li>
                        <li>
                            <a href="#">Link</a>
                        </li>
                        <li class="dropdown">
                            <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown<strong class="caret"></strong></a>
                            <ul class="dropdown-menu">
                                <li>
                                    <a href="#">Action</a>
                                </li>
                                <li>
                                    <a href="#">Another action</a>
                                </li>
                                <li>
                                    <a href="#">Something else here</a>
                                </li>
                                <li class="divider">
                                </li>
                                <li>
                                    <a href="#">Separated links</a>
                                </li>
                                <li class="divider">
                                </li>
                                <li>
                                    <a href="#">One more separated link</a>
                                </li>
                            </ul>
                        </li>
                    </ul>
                    <form class="navbar-form navbar-left" role="search">
                        <div class="form-group">
                            <input type="text" class="form-control" />
                        </div> <button type="submit" class="btn btn-default">Submit</button>
                    </form>
                    <ul class="nav navbar-nav navbar-right">
                        <li>
                            <a href=""> 欢迎您 <?php echo $_COOKIE['username']; ?></a>
                        </li>
                        <li class="dropdown">
                            <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown<strong class="caret"></strong></a>
                            <ul class="dropdown-menu">
                                <li>
                                    <a href="#">Action</a>
                                </li>
                                <li>
                                    <a href="#">Another action</a>
                                </li>
                                <li>
                                    <a href="#">Something else here</a>
                                </li>
                                <li class="divider">
                                </li>
                                <li>
                                   欢迎您
                                </li>

                            </ul>
                        </li>
                    </ul>
                </div>

            </nav>
        </div>
    </div>
</div></body>
</html>

　　

posted @ 2019-06-23 02:04  X__cicada  阅读(189)  评论(0)    收藏  举报