How to achieve seven days without login in php
php method to implement seven-day login-free: 1. Create a button on the front-end for users to choose seven-day login-free; 2. In the back-end, query the user's ID based on the username and password submitted by the user; 3. Store the user ID in cooike; 4. Set the expiration time of seven days.
The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.
php How to avoid login for seven days?
Implement the 7-day login-free function in php to prevent cookie spoofing
1. Login-free idea
The user selects the seven-day login-free button , the backend queries the user's ID based on the username and password submitted by the user, stores the user ID in cooike and sets an expiration time of seven days. When cookie information is not cleared (when exiting abnormally), the background helps users log in. It is actually implemented using cookies.
2. Verify login file: 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;
}3. Database configuration file: 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 $e->getMessage();
}4. Login page file: login.php
<?php
if($_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>5. Home page file: 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>Recommended study: " PHP video tutorial》
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