建立首頁程式碼 index.php
##本頁面加入了登錄，註冊，退出功能，並使用了session判斷了用戶是否登錄
<?php
if($_SESSION ['username']){
?>
<a href="?act=loginout">退出</a>
<?php }
else{
?>
<a href="login.html">登入</a>|<a href="reg.html">註冊</a>
<? php
}
?>
#以及銷毀session <?php
session_start();
if($_GET['act']=="loginout"){
$_SESSION ['username']='';
?>###<script>### location.href="?";### </script>### exit;###}####################################index.php 完整程式碼### ######
<?php
session_start();
if($_GET['act']=="loginout"){
$_SESSION['username']='';
?>
<script>
location.href="?";
</script>
<?
exit;
}
header("Content-type:text/html;charset=utf-8"); //设置编码
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "mybbs";
// 创建连接
$conn = mysqli_connect($servername, $username, $password, $dbname);
mysqli_set_charset($conn,'utf8'); //设定字符集
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>论坛</title>
<style>
.cen{
width: 55%;
margin: 0 auto;
text-align: right;
margin-top: 30px;
}
table{
width: 55%;
margin-top: 10px;
}
.title{
background-color: #B10707;
font-size: 17px;
color: white;
}
.right{
margin-left: 120px;
}
</style>
</head>
<body>
<div class="cen">
<?php
if($_SESSION['username']){
?>
<a href="?act=loginout">退出</a>
<?php }
else{
?>
<a href="login.html">登录</a>|<a href="reg.html">注册</a>
<?php
}
?>
</div>
<table border="1px" cellspacing="0" cellpadding="8"align="center">
<tr class="title">
<td COLSPAN="3">
论坛列表<span class="right">[<a style="color: white" href="add_forum.php">添加</a> ]</span>
</td>
</tr>
<tr>
<td width="10%"><strong>主题</strong></td>
<td width="40"><strong>论坛</strong></td>
<td width="15"><strong>最后更新</strong></td>
</tr>
<?php
$sql="select * from forums";
$que=mysqli_query($conn,$sql);
$sum=mysqli_num_rows($que);
if($sum>0) {
while ($row = mysqli_fetch_array($que)) {
?>
<tr>
<td><?php echo $row['subject'] ?></td>
<td><?php echo "<div class=\"bold\"><a class=\"forum\" href=\"forums.php?F=" . $row['id'] . "\">" . $row["forum_name"] . "</a></div>"
. $row["forum_description"] ?></td>
<td>
<div><?php echo $row["last_post_time"]?></div>
</td>
</tr>
<?php
}
}else{
echo "<tr><td colspan='3'>对不起，论坛正在建设中，感谢你的关注......</td></tr>";
}
?>
</table>
</body>
</html>#########
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