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PHP+MySql implements simple message board function

coldplay.xixi

Aug 27, 2020 pm 04:37 PM

phpmessage board

PHP+MySql implements simple message board function

[Related learning recommendations: mysql tutorial】

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

Message board is the basis for WEB development. To write a message board, you need to know some basic tags on the front end, and have some knowledge about the database. A person who understands basic 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...

Build one first Database, there are two tables in the database, one stores the account password, and the other stores the 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
);

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" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Vmorish</a><br>
          E-mail:vmorish@163.com
        </font>
      </td>
    </tr>
  </table>
 
</body>
 
</html>

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" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Vmorish</a><br>
          E-mail:vmorish@163.com
        </font>
      </td>
    </tr>
  </table>
 
</body>
 
</html>

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" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Vmorish</a><br>
          E-mail:vmorish@163.com
        </font>
      </td>
    </tr>
  </table>
 
</body>
 
</html>

Effect:

manage.php and reply.php are similar to the previous ones, so they will not be given. (I haven’t written it yet...but the implementation 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;
 ?>

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