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Use PHP to connect to the database to implement the message board function

巴扎黑

Sep 14, 2017 am 10:19 AM

phpdatabasemessage board

The editor below will bring you an example of using PHP to connect to the database to implement the message board function (recommended). The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor and take a look.

PHP implements the message board function:

1 The first is the login page:

<!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">
  <p class="header">
   <h2 id="开发部内部留言板">开发部内部留言板</h2>
   <p 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">
   </p>
   <p 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">
   </p>
   <button type="submit" class="btn btn-success login">登录</button>
  </p>
 </form>
 </body>
</html>

2 After the login page is completed, you need to enter the login processing page, which is the messloginchuli.php submitted above

<?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();
$sql = "select password from yuangong where username=&#39;{$uid}&#39;";
$arr = $db->query($sql,0);
//var_dump($arr[0][0]);
if($arr[0][0]=$pwd && !empty($pwd)){
 $_SESSION["uid"]=$uid;
 header("location:message.php");
}

?>

The login page looks like this:

3. After the login is completed, you will enter the home page. The following is the table of the designed database and the code of the main page:

<!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;
  }
  ?>
  <p >
   <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>
   </p>
  <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();
    $sql = "select * from liuyan where recever=&#39;{$uid}&#39; or recever=&#39;all&#39;";
    $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>

Exit the login system to implement user logout and return to the login page. The function code is as follows:

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

？>

The code is written here, and the more important part is completed. Below It is time to enter the release information page, which is equivalent to the added page written before. The processing page is no different from before. The difference is that the current processing page is operated when the user is logged in, and all logins need to be logged in using session. The pages under the circumstances are connected

The effect of the main page is as shown in the figure:

4. The last is the information release page, where you can send information to anyone

The code is as follows:

<!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 ;
}
?>
 <p >
  <p >
   <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>
   </p>
  <form class="form-horizontal" role="form" action="infochuli.php" method="post">
   
   <p class="form-group">
     <label for="firstname" class="col-sm-2 control-label mess1">接收人:</label>
     <p 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
      //$sql = "select firend.firend,yuangong.name from firend,yuangong where firend.firend 
      //= yuangong.username and firend.me = &#39;{$uid}&#39;";
      $sname = "select * from yuangong where username not in (&#39;{$uid}&#39;)";
      $arr = $db->query($sname,0);      
      //var_dump($arr[0][2]);
      foreach($arr as $v){
       echo "<option value=&#39;{$v[0]}&#39;>{$v[2]}</option>";
      }
      ?>      
      </select>
     </p>
    </p>
   
   <p class="form-group">
    <label for="lastname" class="col-sm-2 control-label mess1">信息内容:</label>
    <p class="col-sm-10">
     <textarea class="form-control txt" rows="3" name="content"></textarea>
    </p>
   </p>
   <p class="form-group">
    <p class="col-sm-offset-2 col-sm-10">
     <button type="submit" class="btn btn-default">
     发送
     </button>
    </p>
   </p>
  </form>
 </p>

 </body>
</html>

Send The information page is as shown in the figure:

5. After publishing the information, you have to enter the processing page, which is the submitted infochuli.php, and finally return to send Information interface

<?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();
$sql = "insert into liuyan values(&#39;&#39;,&#39;{$uid}&#39;,&#39;{$t}&#39;,&#39;{$recever}&#39;,&#39;{$content}&#39;,0)";
$arr = $db->query($sql);
if($arr && !empty($arr)){
 header("location:publish_info.php");
}else{
 echo "发送失败!";
}

?>

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