先来看下效果截图
输入用户名和密码后单击登录转跳到主页
201.PNG
这里就是一个简单的信息显示页面
203.PNG
下面看下源代码
<?php session_start(); ?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<center>
<title>留言</title>
</head>
<body background="6.jpg">
<?php
if (isset($_SESSION["uid"])){
echo"欢迎你！". $_SESSION["username"];
echo "<a href=\"percenter.php?uid='" . $_SESSION["uid"] . "'\">个人中心</a>";
echo "<a href='denglu.php'>退出</a>";
}else{
die("无权访问，请登录后查看！<meta http-equiv='Refresh' content='0;url=denglu.php'/>");
}
?>
<h1>欢迎你！</h1>
<table border="0" cellpadding="30">
<tr>
<th>留言人</th>
<th>留言</th>
<th>ip</th>
<th>性别</th>
<th>时间</th>
</tr>
<?php
include "my.php";
$sql = "select * from message";
$result = mysqli_query($conn,$sql);
while ($message = mysqli_fetch_array($result) ) {
echo "<tr>";
$sql1 = "select username,sex from user where uid ='".$message["uid"]."'";
$result1 = mysqli_query($conn,$sql1);
$persion = mysqli_fetch_array($result1);
$user = $persion["username"];
$sex = $persion["sex"];
echo "<td>".$user."</td>";
echo "<td>".$message["content"]."</td>";
echo "<td>".$message["ip"]."</td>";
echo "<td>".$sex."</td>";
echo "<td>".$message["time"]."</td>";
if($_SESSION["uid"]==$message["uid"]){
echo "<td> <a href='bianji.php?mid=" . $message["id"] . "'> 编辑</a></td>
<td> <a href=\"shanchu.php?mid=" . $message["id"] . "\">删除</a>
</td>";
}else{
echo "<td >编辑</td>";
echo "<td>删除</td>";
}
echo "</tr>";
}
?>
</table>
<form method="post" action="message.php">
<textarea name="content" rows="10" cols="80"></textarea>
<br />
<input type="submit" name="submit" value="添加留言">
<input type="reset" name="reset" value="重置">
</center>
</body>
</html>
这几行就是核心代码
限制了只能删除、编辑自己的留言和 输出了所有的留言信息
这里有几个sql和数据库交互的函数
mysqli_query() , mysqli_fetch_array() ,
<?php
include "my.php";
$sql = "select * from message";
$result = mysqli_query($conn,$sql);
while ($message = mysqli_fetch_array($result) ) {
echo "<tr>";
$sql1 = "select username,sex from user where uid ='".$message["uid"]."'";
$result1 = mysqli_query($conn,$sql1);
$persion = mysqli_fetch_array($result1);
$user = $persion["username"];
$sex = $persion["sex"];
echo "<td>".$user."</td>";
echo "<td>".$message["content"]."</td>";
echo "<td>".$message["ip"]."</td>";
echo "<td>".$sex."</td>";
echo "<td>".$message["time"]."</td>";
if($_SESSION["uid"]==$message["uid"]){
echo "<td> <a href='bianji.php?mid=" . $message["id"] . "'> 编辑</a></td>
<td> <a href=\"shanchu.php?mid=" . $message["id"] . "\">删除</a>
</td>";
}else{
echo "<td >编辑</td>";
echo "<td>删除</td>";
}
echo "</tr>";
}
?>
这几行代码是添加留言的
<form method="post" action="message.php">
<textarea name="content" rows="10" cols="80"></textarea>
<br />
<input type="submit" name="submit" value="添加留言">
<input type="reset" name="reset" value="重置">
看效果截图
204.PNG
205.PNG
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