php 怎麼實現七天免登入

2022-10-25 14:00:39

php實現七天免登入的方法:1、在前端建立一個使用者選擇七天免登入的按鈕;2、在後端中,根據使用者提交的使用者名稱和密碼查詢到使用者的id;3、將使用者id存入cooike中;4、設定七天的過期時間即可。

php入門到就業線上直播課:進入學習
Apipost = Postman + Swagger + Mock + Jmeter 超好用的API偵錯工具:

本教學操作環境:windows7系統、PHP8.1版、Dell G3電腦。

php 怎麼實現七天免登入?

php中實現7天免登入功能,防止cookie欺騙

1、免登入思路

使用者選擇七天免登入按鈕,後端根據使用者提交的使用者名稱和密碼查詢到使用者的id將使用者id存入cooike中並設定七天的過期時間。在不清除cookie資訊(非正常退出的時候),後臺幫助使用者登入。實際就是利用cooki實現。

2、驗證登入檔案: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){
    //驗證成功
    clearCookie();
    if($islogin==1){
        //記住密碼
        setcookie("username",$res['username'],strtotime('+7 days'));
        $token = settoken($res['username'],$res['password'],$res['id']);
        setcookie("token",$token,strtotime('+7 days'));
    }else{
        // 無記住密碼
        setcookie("username",$res['username']);
        $token = settoken($res['username'],$res['password'],$res['id']);
        setcookie("token",$token);
    }
    exit("
        <script>
            alert('登入成功!');
            location.href ='index.php';
        </script>
    ");
}else{
    //驗證失敗
    exit("
        <script>
            alert('使用者名稱或密碼有誤!');
            location.href ='login.php';
        </script>
    ");
}
//清除cookie
function clearCookie(){
    setcookie("username",'',time()-1800);
    setcookie("token",'',time()-1800);
}
//設定token
function settoken($username,$password,$id)
{
    $salk = "czx";
    $token = md5($salk.$username.$password)."*".$id;
    return $token;
}
登入後複製

3、資料庫組態檔:config.php

<?php
//主機地址
define("DB_HOST","localhost");
//資料庫使用者名稱
define("DB_USER","root");
//資料庫密碼
define("DB_PASSWORD","root123");
// 資料庫型號
define("DB_TYPE","mysql");
// 資料庫名稱
define("DB_NAME","my_user");
//資料庫編碼
define('DB_CHARSET', 'utf8');
//資料庫埠號
define('DB_PORT', '3306');
//定義PDO的DSN,資料來源名,包括主機名,埠號和資料庫名稱。
define('DSN', DB_TYPE.":host=".DB_HOST.";dbname=".DB_NAME.";charset=".DB_CHARSET);
try{
    //連線資料款
    $pdo = new PDO(DSN,DB_USER,DB_PASSWORD);
} catch(PDOException $e){
     //捕捉特定於資料庫資訊的PDOEXCEPTION 異常
    echo  $e->getMessage();
} catch(Throwable $e){
    //捕捉擁有Throwable介面的錯誤或者其他異常
    echo $e->getMessage();
}
登入後複製

4、登入頁面檔案 : 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('使用者已登入,請直接存取!');
                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>登入</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 >登入</h3>
    <form action="checkLogin.php" method="post">
        <div>
            <div>
                <span>使用者名稱:</span>
                <input type="text" name="uname">
            </div>
            <div>
                <span>密&nbsp;&nbsp;&nbsp;碼:</span>
                <input type="password" name="pwd">
            </div>
            <div>
                <input type="radio"" name="islogin" value="1">
                <span>記住密碼</span>
            </div>
            <div>
                <input  type="submit" value="登入">
            </div>
        </div>
    </form>
</body>
</html>
登入後複製

5、首頁檔案:index.php

<?php
    $token = $_COOKIE['token'];
    $token_arr = explode("*",$token);
    $uid = end($token_arr);//獲取使用者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('請先登入');
                loction.href ='login.php';    
                </script>            
            ");
        }
    }else{
        exit("
            <script>
                alert('請您先登入');
                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>首頁</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>陶轉轉首頁</h1>
    <div>
      <div>
        <ul>
          <li><a href="">LOGO</a></li>
          <li><a href="">首頁</a></li>
          <li><a href="">分類一</a></li>
        </ul>
      </div>
      <div>
        <span>歡迎您,<?php echo $result['username'];?></span>
        <a href="./login.php?act=out">退出</a>
      </div>
    </div>
  </body>
</html>
登入後複製

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