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php 怎么实现七天免登录

藏色散人

发布： 2022-10-25 11:13:28

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2147人浏览过

php实现七天免登录的方法：1、在前端创建一个用户选择七天免登录的按钮；2、在后端中，根据用户提交的用户名和密码查询到用户的id；3、将用户id存入cooike中；4、设置七天的过期时间即可。

php 怎么实现七天免登录

本教程操作环境：windows7系统、PHP8.1版、Dell G3电脑。

php 怎么实现七天免登录？

php中实现7天免登录功能，防止cookie欺骗

1、免登录思路

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用户选择七天免登录按钮，后端根据用户提交的用户名和密码查询到用户的id将用户id存入cooike中并设置七天的过期时间。在不清除cookie信息（非正常退出的时候），后台帮助用户登录。实际就是利用cooki实现。

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2、验证登录文件：checkLogin.php

<?php
header('content-type:text/html;charset=utf-8');
require './config.php';
$username = $_POST['uname'];
$password = md5($_POST['pwd']);
$islogin = $_POST['islogin'];
$sql = "SELECT * FROM `mu_user` WHERE `username`=? AND `password`=? ";
$stm = $pdo -> prepare($sql);
$stm ->bindParam(1,$username);
$stm ->bindParam(2,$password);
$stm ->execute();
$res = $stm->fetch(PDO::FETCH_ASSOC);
if($stm->rowCount() == 1){
    //验证成功
    clearCookie();
    if($islogin==1){
        //记住密码
        setcookie("username",$res['username'],strtotime('+7 days'));
        $token = settoken($res['username'],$res['password'],$res['id']);
        setcookie("token",$token,strtotime('+7 days'));
    }else{
        // 无记住密码
        setcookie("username",$res['username']);
        $token = settoken($res['username'],$res['password'],$res['id']);
        setcookie("token",$token);
    }
    exit("
        <script>
            alert('登录成功！');
            location.href ='index.php';
        </script>
    ");
}else{
    //验证失败
    exit("
        <script>
            alert('用户名或密码有误！');
            location.href ='login.php';
        </script>
    ");
}
//清除cookie
function clearCookie(){
    setcookie("username",'',time()-1800);
    setcookie("token",'',time()-1800);
}
//设置token
function settoken($username,$password,$id)
{
    $salk = "czx";
    $token = md5($salk.$username.$password)."*".$id;
    return $token;
}

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3、数据库配置文件：config.php

<?php
//主机地址
define("DB_HOST","localhost");
//数据库用户名
define("DB_USER","root");
//数据库密码
define("DB_PASSWORD","root123");
// 数据库型号
define("DB_TYPE","mysql");
// 数据库名称
define("DB_NAME","my_user");
//数据库编码
define('DB_CHARSET', 'utf8');
//数据库端口号
define('DB_PORT', '3306');
//定义PDO的DSN，数据源名，包括主机名，端口号和数据库名称。
define('DSN', DB_TYPE.":host=".DB_HOST.";dbname=".DB_NAME.";charset=".DB_CHARSET);
try{
    //连接数据款
    $pdo = new PDO(DSN,DB_USER,DB_PASSWORD);
} catch(PDOException $e){
     //捕捉特定于数据库信息的PDOEXCEPTION 异常
    echo  $e->getMessage();
} catch(Throwable $e){
    //捕捉拥有Throwable接口的错误或者其他异常
    echo $e->getMessage();
}

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4、登录页面文件： login.php

<?php
    if($_GET['act'] == 'out'){
        setcookie("username",'',time()-1800);
        setcookie("token",'',time()-1800);
    }
    $token = $_COOKIE['token'];
    $username = $_COOKIE['username'];
    if(!empty($username) &&!empty($token)&& ($_GET['act'] != 'out')){
        exit("
            <script>
                alert('用户已登录，请直接访问！');
                location.href ='index.php';
            </script>
        ");
    }
?>
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>登录</title>
</head>
<style>
    *{
        margin: 0px;
        padding: 0;
    }
    .contater {
        border: 1px solid #000;
        width: 300px;
        display: flex;
        flex-direction: column;
        margin: auto;
    }
    .contater>div {
        margin-top: 20px;
    }
    h3 {
        text-align: center;
    }
    .contater > .submit >input{
        margin: 15px 140px;
        font-size: 1.5rem;
    }
</style>
<body>
<h3 >登录</h3>
    <form action="checkLogin.php" method="post">
        <div>
            <div>
                <span>用户名：</span>
                <input type="text" name="uname">
            </div>
            <div>
                <span>密   码：</span>
                <input type="password" name="pwd">
            </div>
            <div>
                <input type="radio"" name="islogin" value="1">
                <span>记住密码</span>
            </div>
            <div>
                <input  type="submit" value="登录">
            </div>
        </div>
    </form>
</body>
</html>

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5、首页文件：index.php

<?php
    $token = $_COOKIE['token'];
    $token_arr = explode("*",$token);
    $uid = end($token_arr);//获取用户id
    require "./config.php";
    $sql = "SELECT * FROM `mu_user` WHERE `id`=?";
    $stm = $pdo ->prepare($sql);
    $stm ->bindParam(1,$uid);
    $stm ->execute();
    $result =$stm->fetch(PDO::FETCH_ASSOC);
    if($stm->rowCount()==1){
        $salk = "czx";
        $token_res = md5($salk.$result['username'].$result['password']);
        if($token_res != $token_arr[0]){
            exit("
                <script>
                alert('请先登录');
                loction.href ='login.php';    
                </script>            
            ");
        }
    }else{
        exit("
            <script>
                alert('请您先登录');
                location.href='login.php';
            </script>
        ");
    }
?>
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>首页</title>
  </head>
  <style>
    * {
      margin: 0px;
      padding: 0px;
      box-sizing: border-box;
    }
    h1 {
      text-align: center;
    }
    a {
      text-decoration: none;
      font-size: 1.5rem;
      color: darkgray;
    }
    a:hover {
      background-color: lightskyblue;
      border-radius: 5%;
      /* font-size: 2rem; */
    }
    li {
        list-style-type: none;
        color: darkgray;
    }
    span {
        color: darkgray;
        font-size: 1.5rem;
        margin-right: 15px;
        color:burlywood
    }
    .top {
      /* width: 960px; */
      background-color: linen;
      display: flex;
      flex-flow: row nowrap;
      justify-content: space-between;
    }
    .top > div {
      margin: 10px 40px;
    }
    .column {
      /* width: 960px; */
      display: flex;
      flex-flow: row nowrap;
      justify-content: space-around;
    }
    .column > li {
      margin-right: 65px;
      padding: 0px 20px;
    }
  </style>
  <body>
    <h1>陶转转首页</h1>
    <div>
      <div>
        <ul>
          <li><a href="">LOGO</a></li>
          <li><a href="">首页</a></li>
          <li><a href="">分类一</a></li>
        </ul>
      </div>
      <div>
        <span>欢迎您,<?php echo $result['username'];?></span>
        <a href="./login.php?act=out">退出</a>
      </div>
    </div>
  </body>
</html>

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