PHP中利用cookie实现自动登录(案例)-代码收集-无忧免费主机论坛

PHP中利用cookie实现自动登录(案例)

admin 2016-10-27 1834

判断用户是否登录,先从session读取,没有的话,再试着去读cookie。

代码:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>登录</title>
</head>
<body>
    <form action="do_login.php" method="post">
        username <input type="text" name="username" /><br>
        password <input type="password" name="password" /><br>
        remember <input type="checkbox" name="remember" value="1" /><br>
        <input type="submit" value="Login" />
    </form>
</body>
</html>

do_login.php

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
<?php
    $key="88888";
    session_start();
    if($_POST['username']=='admin' && $_POST['password']=='123456'){
        //登录成功
        $user['id']=1314;            //用户id
        $user['name']='phperblog.cn';    //用户显示名称
        $_SESSION['user']=$user;
        //如果选中记住我，就将登录信息放入Cookie中
        if($_POST['remember'] == '1'){
            //将登录信息，存放在Cookie中
            $value=serialize($user);            
            $md5str=md5($value.$key);
            setcookie('autoLogin', $md5str . $value ,time()+60*60*24*30,'/');
        }
        header('Location: index.php');
    }else{
        echo '用户名或密码不匹配';
    }

index.php

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
<?php
    $key="88888";
    //开启Session
    session_start();
    //如果Session中没有登录信息，尝试从Cookie中加载用户信息
    if(empty($_SESSION['user']['id'])){
        $value=$_COOKIE['autoLogin'];
        // 去掉魔术引号
        if (get_magic_quotes_gpc()) {
            $value=stripslashes($value);
        }
        $md5str=substr($value,0,32);
        $value=substr($value,32);
        //校验
        if(md5($value . $key) == $md5str){
            $user=unserialize($value);
            $_SESSION['user']=$user;
        }
    }
?><!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>首页</title>
</head>
<body>
 
    <div class="top">欢迎您 
        <?php
            if(isset($_SESSION['user']['id'])){
                echo $_SESSION['user']['name'];
                echo ' <a href="logout.php">注销</a>';
            }else{
                echo ' <a href="login.php">请登录</a>';
            }
        ?>
    </div>
    
</body>
</html>

logout.php

1
2
3
4
5
6
<?php
    //注销
    session_start();
    unset($_SESSION['user']);
    setcookie('autoLogin','',time()-1,'/');
    header('Location: index.php');

最新回复 (1)

发新帖

admin

主题数
71

帖子数
61

注册排名
1

PHP中利用cookie实现自动登录(案例)

admin

作者最近主题：