PHP實作留言板功能：
1 首先是登入頁面：
<!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="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>开发部内部留言板</h2>
<p class="input-group xiugai">
<span class="input-group-addon" style="margin-top: 20px;">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" style="margin-top: 10px;">
<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 登入頁面完成後要進入登入處理頁面了，也就是上面提交到的messloginchuli.php
<?phpsession_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");
}
?>登入頁面效果如圖：
3.登入完成後是進入主頁，也就是顯示自己收到的對話內容，以下是設計的資料庫的表格和首頁面的程式碼：
<!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="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 style="margin-left: 880px; margin-top: 50px;font-size: 20px;" >
<a href="publish_info.php" >发布信息</a>
<a href="tuichuchuli.php">退出系统</a>
</p>
<table class="table table-bordered mess" style="margin-top: -40px;">
<caption style="font-size: 20px;">
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>退出登入系統實作使用者登出，回到登入頁面功能代碼如下：
<?phpsession_start();
$uid = $_SESSION["uid"];
unset($uid);
header("location:messlogin.php");
？>程式碼寫到這裡，比較重要的部分就完成了，下面是要進入發布資訊頁面了，相當於之前寫的添加的頁面，其處理頁面也是和之前沒什麼區別的，差別在於現在的處理頁面是在用戶登錄的情況下操作的，需要用session把所有的登入情況下的頁面連接起來
主頁面效果如圖：
<!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="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><?phpsession_start();
$uid = $_SESSION["uid"];
if (empty($_SESSION["uid"])) {
header("location:messlogin.php");
exit ;
}
?> <p style="margin-left: 500px;
margin-top: 150px;
"> <p style="margin-left: 60px;
margin-bottom: 20px;
font-size: 20px;
" > <a href="message.php" >查看信息</a> <a href="seemess.php" style="margin-left: 80px;
" >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 = ' {
$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> </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>
<?phpsession_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!";
}
?>以上是如何使用PHP連接資料庫實現留言板功能的詳細內容。更多資訊請關注PHP中文網其他相關文章！
