How to implement a simple message board in php-PHP Problem-php.cn

How to implement a simple message board in php: 1. Create two tables in the database; 2. Write the send page and message page; 3. Implement user login through session; 4. Create a logout login page.

How to implement a simple message board in php

The operating environment of this article: Windows 7 system, PHP version 7.4, Dell G3 computer.

How to implement a simple message board in php?

PHP MySql implements a simple message board:

//Well, I learned from the book. I didn’t write the code myself, but I can understand it. I have time to write a better-looking one by myself~ (It took me a day if I am not skilled...

Message board is the basis for contact with WEB development. To write a message board, you need to know some basic tags on the front end. The database has a basic understanding of SQL language, basic knowledge of PHP, basic database basics and PHP basics => message board.

The front is high energy wow (the interface is really confusing...

First Build a database. There are two tables in the database, one to store account passwords, and one to store message information.

//创建数据库，里面有两张表Admin和Message
create database gbook;
//创建Admin表，记录用户名和密码
create table admin(
    username varchar(20) not null,
    userpass varchar(20) not null
);
//创建Message表，记录留言的id，留言人，留言日期，留言内容以及回复
create table message(
    id int(4) not null auto_increment primary key,
    author varchar(20) not null,
    addtime datetime not null,
    content varchar(1000) not null,
    reply varchar(1000) not null
);

Copy after login

First implement the user message part. This is the first step. If there is no message, the index page will be empty~

<!-- 1.用户填写留言部分 send.php -->
<!-- 可以首先编写send页面，只有用户提交了留言才能进行后面的留言显示，留言管理等等 -->
 
<?php
    $name = $_POST["name"];//从input里面传过来的name
    //看用户是否提交了新留言，如果提交了，则写入表message
    if( $name != ""){
        $content = $_POST["content"];
        //下面的代码用于获得当前日期和时间
        $addtime = date("Y-m-d h:i:s");//得到日期
        $link = mysqli_connect("127.0.0.1","root","Vmorish");//PHP连接数据库
        if( $link)
            echo "ok!<br>";
        else {
            echo "bad!<br>";
        }
        mysqli_select_db($link,"gbook");//选择数据库
        $insert = "insert into message(author,addtime,content,reply) values(&#39;$name&#39;,&#39;$addtime&#39;,&#39;$content&#39;,&#39;&#39;)";
        mysqli_query($link,$insert);
        mysqli_close($link);
        echo "<script language=javascript>alert(&#39;留言成功!单击确定查看留言.&#39;);location.href=&#39;index.php&#39;;</script>";
    }
    mysqli_close($link);
 
 ?>
 
<html>
 
<head>
    <title>欢迎来到陈雨情的留言本吼吼吼</title>
</head>
 
<body>
    <!-- border-collapse:collapse合并表格的边框 -->
    <table border=1 cellspacing=0 cellspadding=0 style="border-collapse:collapse" align=center width=400 bordercolor=black>
        <tr>
            <td height=100 bgcolor=#6c6c6c>
                <font style="font-size:30px" color=#ffffff face="黑体">欢迎来到×××的留言本吼吼吼</font>
            </td>
        </tr>
        <tr>
            <td height=25>
                 <a href=send.php>[我要写留言]</a> 
                 <a href=login.php>[管理留言]</a>
            </td>
        </tr>
        <tr>
            <td height=200>
                <form method="POST" action="send.php">
                    <table border="1" width="95%" id="table1" cellspacing="0" cellpadding="0" bordercolor="#808080" style="border-collapse:collapse" height="265">
                        <tr>
                            <td colspan="2" height="29">
                                <p align="center">欢迎填写你的留言</p>
                            </td>
                        </tr>
                        <tr>
                            <td width="32%">
                                <p align="right">你的名字</p>
                            </td>
                            <td width="67%">
                                <input type="text" name="name" size="20">
                            </td>
                        </tr>
                        <tr>
                            <td width="32%">
                                <p>留言内容</p>
                            </td>
                            <td width="67%">
                                <textarea rows="10" name="content" cols="31"></textarea>
                            </td>
                        </tr>
                        <tr>
                            <td width="99%" colspan="2">
                                <p align="center">
                                    <input type="submit" value="提交" name="B1">
                                </p>
                            </td>
                        </tr>
                    </table>
                </form>
            </td>
        </tr>
        <tr>
            <td height=80 bgcolor=#6c6c6c align=center>
                <font color="#FFFFFF">
                    版权所有：<a href="http://blog.csdn.net/cherish0222">Vmorish</a><br>
                    E-mail:vmorish@163.com
                </font>
            </td>
        </tr>
    </table>
 
</body>
 
</html>

Copy after login

Effect:

Then you can go to the main page

<!-- 2.留言本首页 index.php -->
<!-- 本页面显示十条最近的的留言，并且有分页功能 -->
<html>
 
<head>
    <title>欢迎来到陈雨情的留言本吼吼吼</title>
    <style type="text/css">
        TD{
            font-size: 12px;
            line-height: 150%;
        }
    </style>
</head>
 
<body>
    <table border=1 cellspacing=0 cellspadding=0 style="border-collapse:collapse" align=center width=400 bordercolor=black height=382>
        <tr>
            <td height=100 bgcolor=#6c6c6c style="font-size:30px;line-height:30px">
                <font color=#ffffff face="黑体">欢迎来到×××的留言本吼吼吼</font>
            </td>
        </tr>
        <tr>
            <td height=25>
                 <a href=send.php>[我要写留言]</a> 
                 <a href=login.php>[管理留言]</a>
            </td>
        </tr>
        <tr>
            <td height=200>
                <?php
                    $link = mysqli_connect("127.0.0.1","root","Vmorish");
                    mysqli_select_db($link,"gbook");
                    $query = "select * from message";
                    $result = mysqli_query($link,$query);
                    if( mysqli_num_rows($result) < 1){
                        echo " 目前数据表中还没有任何留言!";
                    }else{
                        $totalnum = mysqli_num_rows($result);//获取数据库中所有数据条数
                        $pagesize = 7;//每页显示7条
                        $page = $_GET["page"];
                        if( $page == ""){
                            $page = 1;
                        }
                        $begin = ($page-1)*$pagesize;
                        $totalpage = ceil($totalnum/$pagesize);
                        //输出分页信息
                        echo "<table border=0 width=95%><tr><td>";
                        $datanum = mysqli_num_rows($result);
                        echo "共有".$totalnum."条留言，每页".$pagesize."条，共".$totalpage."页。<br>";
                        //输出页码
                        for( $i = 1; $i <= $totalpage; $i++){
                            echo "<a href=index.php?page=".$i.">[".$i."] </a>";
                        }
                        echo "<br>";
                        //从message表中查询当前页面所要显示的留言，并根据时间排序
                        $query = "select * from message order by addtime desc limit $begin,$pagesize";
                        $result = mysqli_query($link,$query);
                        $datanum = mysqli_num_rows($result);
                        //循环输出所有留言，如果管理员已经回复则同时输出回复
                        for( $i = 1; $i <= $datanum; $i++){//$datanum???
                            $info = mysqli_fetch_array($result);
                            echo "->[".$info[&#39;author&#39;]."]于".$info[&#39;addtime&#39;]."说:<br>";
                            echo "  ".$info[&#39;content&#39;]."<br>";
                            if( $info[&#39;reply&#39;] != ""){
                                // <b></b>显示粗体
                                echo "<b>管理员回复:</b>".$info[&#39;reply&#39;]."<br>";
                            }
                            echo "<hr>";
                        }//else结束
                        echo "</td></tr></table>";
                    }
                    mysqli_close($link)
                 ?>
            </td>
        </tr>
        <tr>
            <td height=80 bgcolor=#6c6c6c align=center>
                <font color="#FFFFFF">
                    版权所有：<a href="http://blog.csdn.net/cherish0222">Vmorish</a><br>
                    E-mail:vmorish@163.com
                </font>
            </td>
        </tr>
    </table>
 
</body>
 
</html>

Copy after login

Effect:

Then the administrator logs in

<!-- 3.管理员登录页面 login.php -->
<!-- 供管理员登录 -->
<!-- 体会session实现用户登录的方法 -->
 
<?php
    $name = $_POST["name"];
    if( $name != ""){
        $password = $_POST[&#39;password&#39;];
        $link = mysqli_connect("127.0.0.1","root","Vmorish");
        mysqli_select_db($link,"gbook");
        $query = "select * from admin where username = &#39;$name&#39;";
        $result = mysqli_query($link,$query);
        if( mysqli_num_rows($result) < 1){
            echo "该用户不存在，请重新登录!<br>";
        }else{
            $info = mysqli_fetch_array($result);
            if( $info[&#39;userpass&#39;] != $password){
                echo "密码输入错误，请重新登录!<br>";
            }else{
                //如果用户名密码都正确，则注册一个session来标记其登录状态
                echo "hhhh<br>";
                session_start();
                // $_SESSION["login"] = "YES";
                echo "<script language=javascript>alert(&#39;登录成功!&#39;);location.href=&#39;manage.php&#39;;</script>";
            }
        }
        mysqli_close($link);
    }
 ?>
 
<html>
 
<head>
    <title>欢迎来到陈雨情的留言本吼吼吼</title>
</heda>
 
<body>
 
    <table border=1 cellspacing=0 cellspadding=0 style="border-collapse:collapse" align=center width=400 bordercolor=black height="358">
        <tr>
            <td height=100 bgcolor=#6c6c6c style="font-size:30px;line-height:30px">
                <font color=#ffffff face="黑体">欢迎来到×××的留言本吼吼吼</font>
            </td>
        </tr>
        <tr>
            <td height=25>
                 <a href=send.php>[我要写留言]</a> 
                 <a href=login.php>[管理留言]</a>
            </td>
        </tr>
        <tr>
            <td height=178>
                <form method="POST" action="login.php">
                    <table border="1" width="95%" id="table1" cellspcing="0" cellpadding="0" bordercolor="#808080" style="border-collapse" height="154">
                        <tr>
                            <td colspan="2" height="29">
                                <p align="center">欢迎管理员登录</p>
                            </td>
                        </tr>
                        <tr>
                            <td width="32%">
                                <p align="center">用户名</P>
                            </td>
                            <td width="67%">
                                <input type="text" name="name" size="20">
                            </td>
                        </tr>
                        <tr>
                            <td width="32%">
                                <p align="center">密 码</p>
                            </td>
                            <td>
                                <input type="password" name="password" size="20">
                            </td>
                        </tr>
                        <tr>
                            <td width="99%" colspan="2">
                                <p align="center"><input type="submit" value="登录" name="B1"></p>
                            </td>
                        </tr>
                    </table>
                </form>
            </td>
        </tr>
        <tr>
            <td height=80 bgcolor=#6c6c6c align=center>
                <font color="#FFFFFF">
                    版权所有：<a href="http://blog.csdn.net/cherish0222">Vmorish</a><br>
                    E-mail:vmorish@163.com
                </font>
            </td>
        </tr>
    </table>
 
</body>
 
</html>

Copy after login

Effect:

##manage.php and reply.php and It’s similar to the previous one, so I won’t give it here (I haven’t written it yet... but what I want to achieve is similar to the previous one

Finally log out and log in

<!-- 6.注销登录页面 -->
<?php
    session_start();
    $_SESSION["login"]="";
    echo "已成功退出。[<a href=index.php>回首页</a>]";
    exit;
 ?>

Copy after login

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