使用PHP连接数据库实现留言板功能的实例讲解(推荐)

转载  2017-09-12   作者:WORSHIP亚萨   我要评论

下面小编就为大家带来一篇使用PHP连接数据库实现留言板功能的实例讲解(推荐)。小编觉得挺不错的,现在就分享给大家,也给大家做个参考。一起跟随小编过来看看吧

PHP实现留言板功能:

1 首先是登录页面:

<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title>留言板登录</title>
  <script src="bootstrap/js/jquery-1.11.2.min.js"></script>
  <script src="bootstrap/js/bootstrap.min.js"></script>
  <link href="bootstrap/css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="stylesheet" type="text/css"/>
 </head>
 <style>
  .header{
   margin-left: 550px;
   margin-top: 150px;
   height: 300px;
   max-width: 300px;
  }
  .xiugai{
   max-width: 200px;
  }
  .login{
   margin-top: 10px;
  }
 </style>
 <body>
  <form action="messloginchuli.php" method="post">
  <div class="header">
   <h2>开发部内部留言板</h2>
   <div class="input-group xiugai">
    <span class="input-group-addon" >用户名:</span>
    <input type="text" class="form-control" name="uid" placeholder="请输入用户名">
   </div>
   <div class="input-group xiugai" >
    <span class="input-group-addon">口令:</span>
    <input type="text" class="form-control" name="pwd" placeholder="请输入口令">
   </div>
   <button type="submit" class="btn btn-success login">登录</button>
  </div>
 </form>
 </body>
</html>

2 登录页面完成后要进入登录处理页面了,也就是上面提交到的messloginchuli.php

<?php
session_start();  // 登录之后要把所包含登录的页面连接起来,开启session
$uid = $_POST["uid"];
$pwd = $_POST["pwd"];
require_once "./DBDA.class.php";
$db = new DBDA();
$sql = "select password from yuangong where username='{$uid}'";
$arr = $db->query($sql,0);
//var_dump($arr[0][0]);
if($arr[0][0]=$pwd && !empty($pwd)){
 $_SESSION["uid"]=$uid;
 header("location:message.php");
}

?>

登录页面效果如图:

3.登录完成后是进入主页面,也就是显示自己收到的对话内容,下面是设计的数据库的表格和主页面的代码:

<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title></title>
  <script src="bootstrap/js/jquery-1.11.2.min.js"></script>
  <script src="bootstrap/js/bootstrap.min.js"></script>
  <link href="bootstrap/css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="stylesheet" type="text/css"/>
 </head>
 <style>
  .mess{
   max-width: 800px;
   margin-left: 250px;
   margin-top: 150px;
  }
 </style>
 <body>
  <?php
  session_start();
  $uid = $_SESSION["uid"];
  if(empty($_SESSION["uid"])){
   header("location:messlogin.php");
   exit;
  }
  ?>
  <div >
   <a href="publish_info.php" rel="external nofollow" >发布信息</a>
   <a href="tuichuchuli.php" rel="external nofollow" >退出系统</a>
   </div>
  <table class="table table-bordered mess" >
   <caption >
    留言信息:
   </caption>
   
   <thead>
    <tr>
     <th>发送人</th>
     <th>发送时间</th>
     <th>接收人</th>
     <th>信息内容</th>
    </tr>
   </thead>
   <tbody>
    <?php
    require_once "./DBDA.class.php";
    $db = new DBDA();
    $sql = "select * from liuyan where recever='{$uid}' or recever='all'";
    $arr = $db->query($sql,0);
    foreach($arr as $v){
     echo "<tr>
     <td>{$v[1]}</td>
     <td>{$v[2]}</td>
     <td>{$v[3]}</td>
     <td>{$v[4]}</td>
    </tr>";
    }
    ?>
    
   </tbody>
  </table>

 </body>
</html>

退出登录系统实现用户注销,返回登录页面功能代码如下:

 <?php
session_start();
$uid = $_SESSION["uid"];
unset($uid);
header("location:messlogin.php");

?>

代码写到这里,比较重要的部分就完成了,下面是要进入发布信息页面了,相当于之前写的添加的页面,其处理页面也是和之前没什么区别的,差别在于现在的处理页面是在用户登录的情况下操作的,需要用session把所有的登录情况下的页面连接起来

主页面效果如图:

4.最后是信息发布页面,可以给任何人发送信息

代码如下:

<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title>发布信息界面</title>
  <script src="bootstrap/js/jquery-1.11.2.min.js"></script>
  <script src="bootstrap/js/bootstrap.min.js"></script>
  <link href="bootstrap/css/bootstrap.min.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="stylesheet" type="text/css"/>
 </head>
 <style>
  .mess{
   max-width: 200px;
   margin-top: 10px;
  }
  .mess1{
   margin-top: 10px;
  }
  .opt{
   max-width: 200px;
   margin-left: 80px;
  }
  .txt{
   max-width: 200px;
  }
 </style>
 <body>
<?php
session_start();
$uid = $_SESSION["uid"];
if (empty($_SESSION["uid"])) {
 header("location:messlogin.php");
 exit ;
}
?>
 <div >
  <div >
   <a href="message.php" rel="external nofollow" >查看信息</a>
   <a href="seemess.php" rel="external nofollow" >查看发送信息</a>
   </div>
  <form class="form-horizontal" role="form" action="infochuli.php" method="post">
   
   <div class="form-group">
     <label for="firstname" class="col-sm-2 control-label mess1">接收人:</label>
     <div class="form-group ">
      <select class="form-control opt" name="recever">
       <option value="all">所有人</option>
      <?php
      
      require_once "./DBDA.class.php";
      $db = new DBDA(); 

       //这里可以给特定的朋友发送信息的sql语句
      //$sql = "select firend.firend,yuangong.name from firend,yuangong where firend.firend 
      //= yuangong.username and firend.me = '{$uid}'";
      $sname = "select * from yuangong where username not in ('{$uid}')";
      $arr = $db->query($sname,0);      
      //var_dump($arr[0][2]);
      foreach($arr as $v){
       echo "<option value='{$v[0]}'>{$v[2]}</option>";
      }
      ?>      
      </select>
     </div>
    </div>
   
   <div class="form-group">
    <label for="lastname" class="col-sm-2 control-label mess1">信息内容:</label>
    <div class="col-sm-10">
     <textarea class="form-control txt" rows="3" name="content"></textarea>
    </div>
   </div>
   <div class="form-group">
    <div class="col-sm-offset-2 col-sm-10">
     <button type="submit" class="btn btn-default">
     发送
     </button>
    </div>
   </div>
  </form>
 </div>

 </body>
</html>

发信息页面如图:

5.发布信息完成后要进入处理页面了,也就是提交到的infochuli.php,最后返回发送信息界面

<?php
session_start();
$uid = $_SESSION["uid"];
$recever = $_POST["recever"];
$content = $_POST["content"];
$arr = $_POST["recever"];
$t = date("Y-m-d H:i:s");
require_once "./DBDA.class.php";
$db = new DBDA();
$sql = "insert into liuyan values('','{$uid}','{$t}','{$recever}','{$content}',0)";
$arr = $db->query($sql);
if($arr && !empty($arr)){
 header("location:publish_info.php");
}else{
 echo "发送失败!";
}

?>

以上这篇使用PHP连接数据库实现留言板功能的实例讲解(推荐)就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持脚本之家。

最新评论