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Use session control to implement page login and logout functions

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2020-01-22 11:45:333137browse

Use session control to implement page login and logout functions

First is an ordinary login page implementation

Use session control to implement page login and logout functions

Login pagelogin.php

<!DOCTYPE html>
<html>
    <head>
        <title>登陆页</title>
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
    </head>
    <body>
        <div>
            <div class="card col-12 mt-5">
                <div>
                    <h4>
                        用户登录
                    </h4>
                    <div class="col-12 mt-4 d-flex justify-content-center">
                        <form method="post" action="action.php">
                            <input type="hidden" name="action" value="login">
                            <div>
                                <label for="username">用户名</label>
                                <input type="text"
                                       class="form-control"
                                       id="username"
                                       name="username"
                                       placeholder="请输入用户名">
                            </div>
                            <div>
                                <label for="password">密码</label>
                                <input type="password"
                                       class="form-control"
                                       id="password"
                                       name="password"
                                       placeholder="请输入密码">
                            </div>
                            <div class="form-group form-check">
                                <input type="checkbox"
                                       class="form-check-input"
                                       id="remember"
                                       name="remember">
                                <label
                                       for="remember">
                                    在这台电脑上记住我的登录状态
                                </label>
                            </div>
                            <button type="submit"
                                    class="btn btn-primary">
                                登录
                            </button>
                        </form>
                    </div>
                </div>
            </div>
        </div>
    </body>
</html>

Login function implementationaction.php
##

  <?php
    session_start();
    switch ($_REQUEST[&#39;action&#39;]) {
        case &#39;login&#39;:
            $username = $_POST[&#39;username&#39;];
            $password = $_POST[&#39;password&#39;];
            $remember = $_POST[&#39;remember&#39;];
            $user = getUser();
            if ($username != $user[&#39;username&#39;]) {
                // 登录失败
                sendLoginFailedResponse();
            }
            if ($password != $user[&#39;password&#39;]) {
                // 登录失败
                sendLoginFailedResponse();
            }
            if ($remember) {
                rememberLogin($username);
            }
            $_SESSION[&#39;username&#39;] = $username;
            header("location:index.php");
            break;
        case &#39;logout&#39;:
            session_unset();
            setcookie("username", "", time() - 1);
            header("location:login.php");
            break;
    }
    function getUser() {
        return array(
            "username" => "cyy",
            "password" => "123456"
        );
    }
    function sendLoginFailedResponse() {
        $response = "<script>
    alert(&#39;用户名或密码错误！&#39;);
    window.location=&#39;login.php&#39;;
    </script>";
        echo $response;
        die;
    }
    function rememberLogin($username) {
        setcookie("username", $username, time() + 7 * 24 * 3600);
    }

Homepageindex.php

Use session control to implement page login and logout functions

<?php
    session_start();
    if (rememberedLogin()) {
        $_SESSION[&#39;username&#39;] = $_COOKIE[&#39;username&#39;];
    }
    if (!hasLoggedIn()) {
        header("location:login.php");
        die;
    }
    function hasLoggedIn() {
        return isset($_SESSION[&#39;username&#39;]) && validateUsername($_SESSION[&#39;username&#39;]);
    }
    function validateUsername($username) {
        return $username == "cyy";
    }
    function rememberedLogin() {
        return isset($_COOKIE[&#39;username&#39;]) && validateUsername($_COOKIE[&#39;username&#39;]);
    }
    ?>
    <!DOCTYPE html>
    <html>
        <head>
            <title>主页</title>
            <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
        </head>
        <body>
            <div>
                <nav class="navbar navbar-light bg-light">
                    <a>
                        使用 Cookie 和 Session 实现会话控制
                    </a>
                    <a href="action.php?action=logout">
                        <button class="btn btn-outline-danger my-2 my-sm-0"
                                type="button">
                            注销
                        </button>
                    </a>
                </nav>
                <div class="d-flex justify-content-around mt-5">
                    <div class="card col-5">
                        <div>
                            <h5>
                                会话控制实战内容一
                            </h5>
                            <h6 class="card-subtitle mb-2 text-muted">
                                SESSION 部分
                            </h6>
                            <p>
                                实现用户认证功能，用户登录、退出与身份识别
                            </p>
                        </div>
                    </div>
                    <div class="card col-5">
                        <div>
                            <h5>
                                会话控制实战内容二
                            </h5>
                            <h6 class="card-subtitle mb-2 text-muted">
                                COOKIE 部分
                            </h6>
                            <p>
                                实现登录记住用户功能，七天免登录认证
                            </p>
                        </div>
                    </div>
                </div>
                <div class="d-flex justify-content-around mt-4">
                    <div class="card col-5">
                        <div>
                            <h5>
                                会话控制实战内容一
                            </h5>
                            <h6 class="card-subtitle mb-2 text-muted">
                                SESSION 部分
                            </h6>
                            <p>
                                实现用户认证功能，用户登录、退出与身份识别
                            </p>
                        </div>
                    </div>
                    <div class="card col-5">
                        <div>
                            <h5>
                                会话控制实战内容二
                            </h5>
                            <h6 class="card-subtitle mb-2 text-muted">
                                COOKIE 部分
                            </h6>
                            <p>
                                实现登录记住用户功能，七天免登录认证
                            </p>
                        </div>
                    </div>
                </div>
            </div>
        </body>
    </html>

Next is the session control example: Wishing Wall source code

Wish wall home page

index.php

##

  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
    <head>
        <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
        <title>许愿墙</title>
        <link rel="stylesheet" href="Css/index.css" />
        <script type="text/javascript" src=&#39;Js/jquery-1.7.2.min.js&#39;></script>
        <script type="text/javascript" src=&#39;Js/index.js&#39;></script>
    </head>
    <body>
        <div id=&#39;top&#39;>
            <a href="wish.php"><span id=&#39;send&#39;></span></a>
        </div>
        <div id=&#39;main&#39;>
            <?php
            //连接数据库
            $connection=mysqli_connect(&#39;127.0.0.1&#39;,&#39;root&#39;,&#39;123456&#39;);
            if(mysqli_connect_error()){
                die(mysqli_connect_error());
            }
            mysqli_select_db($connection,&#39;wall&#39;);
            mysqli_set_charset($connection,&#39;utf8&#39;);
            $sql="SELECT * FROM wall";
            $result=mysqli_query($connection,$sql);
            //显示留言
            while($row=mysqli_fetch_assoc($result)){
                $wish_time=$row[&#39;wish_time&#39;];
                $time=date(&#39;Y-m-d H:i:s&#39;,$wish_time);
                $id=$row[&#39;id&#39;];
                //判断留言板颜色
                switch($row[&#39;color&#39;]){
                    case &#39;a1&#39;:
                        echo "<dl class=&#39;paper a1&#39;>";
                        break;
                    case &#39;a2&#39;:
                        echo "<dl class=&#39;paper a2&#39;>";
                        break;
                    case &#39;a3&#39;:
                        echo "<dl class=&#39;paper a3&#39;>";
                        break;
                    case &#39;a4&#39;:
                        echo "<dl class=&#39;paper a4&#39;>";
                        break;
                    case &#39;a5&#39;:
                        echo "<dl class=&#39;paper a5&#39;>";
                        break;
                    default:
                        echo "<dl class=&#39;paper a1&#39;>";
                        break;
                }
                echo "<dt>";
                echo "<span>{$row[&#39;name&#39;]}</span>";
                echo "<span>No.{$row[&#39;id&#39;]}</span>";
                echo "</dt>";
                echo "<dd>{$row[&#39;content&#39;]}</dd>";
                echo "<dd>";
                echo "<span>{$time}</span>";
                echo "<a href=\"delete.php?num={$id}\"></a>";
                echo "</dd>";
                echo "</dl>";
            }
            mysqli_close($connection);
            ?>
        </div>
        
    <!--[if IE 6]>
        <script type="text/javascript" src="./Js/iepng.js"></script>
        <script type="text/javascript">
            DD_belatedPNG.fix(&#39;#send,#close,.close&#39;,&#39;background&#39;);
        </script>
    <![endif]-->
    </body>
    </html>
Use session control to implement page login and logout functions

Add wish page

wish.php

<!DOCTYPE  >
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
    <head>
        <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
        <title>许愿墙</title>
        <link rel="stylesheet" href="Css/index.css" />
        <script type="text/javascript" src=&#39;Js/jquery-1.7.2.min.js&#39;></script>
        <script type="text/javascript" src=&#39;Js/index.js&#39;></script>
        <style type="text/css">
            #content {
                width: 638px;
                height:650px;
                margin:0 auto;
                margin-top:100px;
                /*background-color:#F0FAFF;
                border:2px solid #C9F;*/
            }
            #content .c-top{
                width: 638px;
                height: 80px;
                background: url(./Images/content_top.jpg) no-repeat;
            }
            #content .c-bottom{
                width: 638px;
                height: 50px;
                background: url(./Images/content_bottom.jpg) no-repeat;
            }
            .c-content{
                width: 638px;
                height: 470px;
                background: url(./Images/content_bg.jpg) repeat;
            }
            .papercolor{
                width:588px;
                height: 60px;
                margin-left: 35px;
                padding-top:15px;
            }
            .p-left{
                float: left;
                width: 120px;
                line-height: 27px;
            }p-left
            .p-right{
                float: left;            
            }
            .color330{
                float: left;
                margin-left: 20px;
                border-right: #404040 1px solid; 
                border-top: #404040 1px solid;  
                border-left:#404040 1px solid;
                width: 25px;
                cursor: pointer;
                border-bottom: #404040 1px solid;
                height: 25px;
            }
            .papercontent{
                width: 588px;
                height: 210px;
                margin-left: 35px;
            }
            .left{
                width: 294px;
                height:100px;
                float: left;
            }
            .right{
                width: 294px;
                height:100px;
                float: left;
            }
            .left-top{
                margin-bottom: 10px;
            }
            .left-bottom{
            }
            .right-top{
                margin-bottom: 10px;
            }
            .right-bottom{
                width:200px;
                height:150px;
                border: 1px solid orange;
                margin-left:20px;
                background-color:#E8DEFF;
            }
            .name{
                clear: both;
                width: 588px;
                height: 50px;
                margin-left: 35px;
                margin-top:10px;
            }
            .name-left{
                width:60px;
                height: 26px;
                line-height: 26px;
                float: left;
            }
            .name-right{
                float: left;
            }
            .name-right input{
                width: 200px;
                height: 26px;
            }
            .code{
                clear: both;
                width: 588px;
                height: 50px;
                margin-left: 35px;
                margin-top:10px;
            }
            .code-left{
                width:50px;
                height: 26px;
                line-height: 26px;
                float: left;
            }
            .code-content{
                width:100px;
                float: left;
            }
            .code-content input{
                width: 100px;
                height: 26px;
            }
            .code-right{
                float:left;
                margin-left: 10px;
            }
            .code-right input{
                width: 40px;
                height: 26px;
                background-color: pink;
            }
            .submit{
                width:174px;
                height:38px;
                background: url(./Images/pic_submit.gif) no-repeat;
                margin-left:217px;
            }
            .shuname{
                width:80px;
                height:25px;
                margin-left: 120px;
            }
            span{
                font-size: 13px;
                font-family: "微软雅黑";
            }
        </style>
        
    </head>
    <body>
        <div id=&#39;top&#39;></div>
        <div id="content">
            <div></div>
            <form action="add.php" method="post" id="myfrom">
                <div>
                    <div>
                        <div>
                            <span>请选择纸条颜色:</span>
                        </div>
                        <div>
                            <div id="a1" style="background:#FFDFFF"></div>
                              <div id="a2" style="background:#C3FEC0"></div>
                              <div id="a3" style="background:#FFE3b8"></div>
                              <div id="a4" style="background:#CEECFF"></div>
                             <div id="a5" style="background:#E8DEFF"></div>
                             <input type="hidden" value="" name="idvalue" id="idvalue">                   
                        </div>
                    </div>
                    <div>
                        <div>
                            <div>
                                <span>输入你的祝福纸条内容:</span>
                            </div>
                            <div>
                                <textarea cols="25" rows="8" id="textfont" name="textfont"></textarea>
                            </div>
                        </div>
                        <div>
                            <div>
                                <span>纸条效果预览:</span>
                            </div>
                            <div>
                                <div style="height:15px"><span>第x条</span><br/></div>
                                 <div style="height:100px;margin-top:10px"><span id="font"></span></div>
                                 <div><span id="name">署名:</span></div>            
                            </div>
                        </div>
                    </div>
                    <div>
                        <div>
                            <span>您的署名:</span>
                        </div>
                        <div>
                            <input id="nameright" type="text" name="name" value="">
                        </div>
                    </div>
                    <div>
                        <div>
                            <span>验证码:</span>
                        </div>
                        <div>
                            <input id="codeone" type="text" name="recode" value=""><span></span>
                        </div>
                        <div>
                            <input id="codetwo" type="text" name="code" value="<?php echo mt_rand(1000,9999); ?>" readonly>
                        </div>                
                    </div>
                    <!--<div><button type="submit" style="width:174px;height:38px"></button></div>-->
                    <input style="BORDER-RIGHT: #f33b78 1px outset; BORDER-TOP: #f33b78 1px outset; FONT-WEIGHT: bold; BORDER-LEFT: #f33b78 1px outset; COLOR: #ffffff; BORDER-BOTTOM: #f33b78 1px outset; BACKGROUND-COLOR: #70ae0b;margin-left: 225px" type="submit" value="→ 开始贴许愿小纸条 ←" name="submit" id="submit">
                    
                        <a href="index.php"><input type="button" name="Submit2" value="返回"></a>    
                </div>
            </form>
            <hr/ style="color:orange;width:550">
            <div></div>
        </div>
    <!--[if IE 6]>
        <script type="text/javascript" src="./Js/iepng.js"></script>
        <script type="text/javascript">
            DD_belatedPNG.fix(&#39;#send,#close,.close&#39;,&#39;background&#39;);
        </script>
    <![endif]-->
        <script type="text/javascript">
            //改变颜色
            $(".color330").click(function(){            
                var value=$(this).css("background-color");
                var idvalue=$(this).attr("id");
                console.log(idvalue);
                $("#idvalue").attr("value",idvalue);
                $(".right-bottom").css("background-color",value);
            })
            //改变值触发的事件
            var textfont = document.getElementById(&#39;textfont&#39;);
            var font = document.getElementById(&#39;font&#39;);
            textfont.onchange=function(){
                font.innerHTML=textfont.value;            
            }
            //改变值触发的事件
            var nameright = document.getElementById(&#39;nameright&#39;);
            nameright.onchange=function(){
                document.getElementById("name").innerText="署名: "+nameright.value;    
            }
            
            //在填写完毕验证码之后验证是否一致
            var codeone = document.getElementById(&#39;codeone&#39;);
            var codetwo = document.getElementById(&#39;codetwo&#39;);
            //表单时区焦点事件
            codeone.onblur=function(){
                //验证两次验证码是否一致
                if(codeone.value != codetwo.value){
                    this.nextSibling.innerHTML=&#39;验证码不一致!&#39;
                    this.nextSibling.style.color=&#39;red&#39;;
                }
            }
            $( &#39;#submit&#39; ).click( function () {
                window.location.href="add.php"; 
            } );
                
        </script>
    </body>
    </html>
Use session control to implement page login and logout functions

Add wish fulfillment

add.php

    <?php
    // 获取表单提交数据
    $name=$_POST[&#39;name&#39;];
    $textfont=$_POST[&#39;textfont&#39;];
    $wish_time=time();
    $color=$_POST[&#39;idvalue&#39;];
    // 数据库操作
    $connection=mysqli_connect(&#39;127.0.0.1&#39;,&#39;root&#39;,&#39;123456&#39;);
    if(mysqli_connect_error()){
        die(mysqli_connect_error());
    }
    mysqli_select_db($connection,&#39;wall&#39;);
    mysqli_set_charset($connection,&#39;utf8&#39;);
    $sql="INSERT INTO wall(content,name,wish_time,color) VALUES(&#39;$textfont&#39;,&#39;$name&#39;,$wish_time,&#39;$color&#39;)";
    $result=mysqli_query($connection,$sql);
    if($result){
        echo &#39;<script>alert("发布成功！");document.location = "index.php";</script>&#39;;
    }else{
        echo &#39;<script>alert("发布失败！");document.location = "index.php";</script>&#39;;
    }
    mysqli_close($connection);
    ?>

Delete wish

delete .php

    <?php
    //接受要删除的留言id
    $num=$_GET[&#39;num&#39;];
    // 数据库操作
    $connection=mysqli_connect(&#39;127.0.0.1&#39;,&#39;root&#39;,&#39;123456&#39;);
    if(mysqli_connect_error()){
        die(mysqli_connect_error());
    }
    mysqli_select_db($connection,&#39;wall&#39;);
    mysqli_set_charset($connection,&#39;utf8&#39;);
    $sql="DELETE FROM wall WHERE id=$num";
    $result=mysqli_query($connection,$sql);
    if($result){
        echo &#39;<script>alert("删除成功！");document.location = "index.php";</script>&#39;;
    }else{
        echo &#39;<script>alert("删除失败！");document.location = "index.php";</script>&#39;;
    }
    mysqli_close($connection);
    ?>
Use session control to implement page login and logout functions

Attach database structure

wall.sql

-- phpMyAdmin SQL Dump
-- version 4.8.5
-- https://www.phpmyadmin.net/
--
-- 主机： localhost
-- 生成日期： 2019-08-18 22:08:38
-- 服务器版本： 8.0.12
-- PHP 版本： 7.3.4
SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
SET AUTOCOMMIT = 0;
START TRANSACTION;
SET time_zone = "+00:00";
/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8mb4 */;
--
-- 数据库： `wall`
--
-- --------------------------------------------------------
--
-- 表的结构 `wall`
--
CREATE TABLE `wall` (
  `id` tinyint(4) NOT NULL COMMENT &#39;留言编号&#39;,
  `content` varchar(200) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT &#39;留言内容&#39;,
  `name` varchar(20) NOT NULL DEFAULT &#39;匿名的宝宝&#39; COMMENT &#39;署名&#39;,
  `wish_time` int(11) NOT NULL COMMENT &#39;留言时间&#39;,
  `color` char(2) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT &#39;留言背景色&#39;
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
--
-- 转存表中的数据 `wall`
--
INSERT INTO `wall` (`id`, `content`, `name`, `wish_time`, `color`) VALUES
(17, &#39;111&#39;, &#39;111&#39;, 1566136880, &#39;a1&#39;),
(19, &#39;333&#39;, &#39;333&#39;, 1566136894, &#39;a3&#39;),
(21, &#39;555&#39;, &#39;555&#39;, 1566136911, &#39;a5&#39;),
(24, &#39;9999&#39;, &#39;9999&#39;, 1566137235, &#39;a4&#39;);
--
-- 转储表的索引
--
--
-- 表的索引 `wall`
--
ALTER TABLE `wall`
  ADD PRIMARY KEY (`id`);
--
-- 在导出的表使用AUTO_INCREMENT
--
--
-- 使用表AUTO_INCREMENT `wall`
--
ALTER TABLE `wall`
  MODIFY `id` tinyint(4) NOT NULL AUTO_INCREMENT COMMENT &#39;留言编号&#39;, AUTO_INCREMENT=26;
COMMIT;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;

Supplementary knowledge points:


[Use COOKIE to achieve session control]

Used to store key user information

Saved on the client (browse Server)

Transmitted through HTTP request/response headers

Use session control to implement page login and logout functions【COOKIE EXPIRED】

● COOKIE EXPIRED

● User manually deletes COOKIE

● The server clears the validity of COOKIE

[Use SESSION to achieve session control]

● Used to store user-related information

● Saved on the server

● Locate the SESSION content through the SESSION ID saved on the client

Use session control to implement page login and logout functions【SESSION invalidation/clearance】

● COOKIE expires (close browser)

● User manually deletes COOKIE

● Server deletes SESSION file or clears SESSION content

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