php实现留言板功能（会话控制）

5年以前 | 阅读数：907 次 | 编程语言：PHP

本文实例为大家分享了php留言板功能的具体代码，供大家参考，具体内容如下

数据库用到的三张表

一.登录界面（denglu.php login.php）

1.denglu.php


    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="UTF-8">
    <title></title>
    </head>

    <body>
    <h1>开发部内部留言板</h1>
    <form action="login.php" method="post">
    <div>用户名：<input type="text" name="UserName" /></div>
    <div>口令：<input type="password" name="PassWord" /></div>
    <input type="submit" value="登录" />
    <a href="denglu.php" style="text-decoration:none"><input type="button" value="复位" /></a>
    </form>
    </body>
    </html>

2.login.php


    <?php
    session_start();
    $UserName = $_POST["UserName"];
    $PassWord = $_POST["PassWord"];

    require "DBDA.class1.php";
    $db = new DBDA();
    $sql = "select PassWord from yuangong where UserName = '{$UserName}'";
    $arr = $db->query($sql);

    if(count($arr))
    {
      if($arr[0][0] == $PassWord && !empty($PassWord))
      {
        //存储用户名
        $_SESSION["UserName"] = $UserName;

        header("location:main.php");
      }
    }
    else
    {
      header("location:denglu.php");
    }

二.主界面（main.php tuichu.php）

1.main.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">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>无标题文档</title>
    </head>

    <body>
    <?php
    session_start();

    //  防止绕过登陆直接进入主界面
    if(empty($_SESSION["UserName"]))
    {
      header("location:denglu.php");
      exit;
    }

    require "DBDA.class1.php";
    $db = new DBDA();
    $UserName = $_SESSION["UserName"];
    ?>
    <div>
    <a href="fabu.php">发布信息</a>
    <a href="tuichu.php">退出系统</a>
    </div><br /><br />
    <h1>留言信息：</h1>
    <table width="100%" border="1" >
      <tr>
        <td>发送人</td>
        <td>发送时间</td>
        <td>接收人</td>
        <td>信息内容</td>
      </tr>
       <?php

      //显示接收者是我的，或者是所有人的
      $sql = "select * from liuyan where Recever='{$UserName}' or Recever='suoyou'";
      $arr = $db->query($sql);
      foreach($arr as $v)
      {

         echo "<tr>
              <td>{$v[1]}</td>
            <td>{$v[3]}</td>
            <td>{$v[2]}</td>
            <td>{$v[4]}</td>
            </tr>";
      }

      ?>  

    </table>
    </body>
    </html>

2.tuichu.php


    <?php
    session_start();
    unset($_SESSION["UserName"]);
    header("location:denglu.php");

三.发送页面（fabu.php fabuchuli.php）

1.fabu.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">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>无标题文档</title>
    </head>

    <body>
    <div>
    <a href="main.php">查看信息</a>
    <a href="tuichu.php">退出系统</a>
    </div>
    <h1>信息发送：</h1>
    <form action="fabuchuli.php" method="post">
    <div>接收人：
    <select name="jsr">
      <option value="suoyou">所有人</option>
      <?php
      session_start();
      $UserName = $_SESSION["UserName"];
      require"DBDA.class1.php";
      $db = new DBDA();
      //方法一
      $sql = "select friend.Friend,yuangong.Name from friend,yuangong where friend.Friend = yuangong.UserName and friend.Me = '{$UserName}'";
      $arr = $db->query($sql);

      foreach($arr as $v)
      {
        echo "<option value='{$v[0]}'>{$v[1]}</option>";
      }
      //方法二
      /*$sql = "select Friend from friend where Me ='{$UserName}'";
      $arr = $db->query($sql);
      foreach($arr as $v)
        {
          $v[0];
          $sname = "select Name from yuangong where UserName = '{$v[0]}'";
          $aname = $db->query($sname);
          echo"<option value='{$v[0]}'>{$aname[0][0]}</option>";
        }*/
      ?>        
    </select></div>
    <div>信息内容：<textarea name="neirong"></textarea></div>
    <input type="submit" value="发送" />
    <a href="fabu.php" style="text-decoration:none"><input type="button" value="复位" /></a>
    </form>
    </body>
    </html>

2.fabuchuli.php


    <?php
    session_start();
    $UserName = $_SESSION["UserName"];
    $jsr = $_POST["jsr"];
    $nr = $_POST["neirong"];
    $Times = date("Y-m-d H:i:s");


    require"DBDA.class.php";
    $db = new DBDA();
    $sql = "insert into liuyan values('','{$UserName}','{$jsr}','{$Times}','{$nr}')";
    $db->query($sql,0);
    header("location:fabu.php");

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。