PHP implements message board function (session control)
This article mainly introduces the case of php to implement message board function and session control in detail. It has certain reference value. Interested friends can refer to it.
The examples in this article are shared with everyone. The specific code of the php message board function is for your reference. The specific content is as follows
Three tables used in the database
##1. Login interface (denglu.php login.php)
##1.denglu.php
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> </head> <body> <h1>开发部内部留言板</h1> <form action="login.php" method="post"> <p>用户名：<input type="text" name="UserName" /></p> <p>口令：<input type="password" name="PassWord" /></p> <input type="submit" value="登录" /> <a href="denglu.php" style="text-decoration:none"><input type="button" value="复位" /></a> </form> </body> </html>
2.login.php
<?php
session_start();
$UserName = $_POST["UserName"];
$PassWord = $_POST["PassWord"];
require "DBDA.class1.php";
$db = new DBDA();
$sql = "select PassWord from yuangong where UserName = '{$UserName}'";
$arr = $db->query($sql);
if(count($arr))
{
if($arr[0][0] == $PassWord && !empty($PassWord))
{
//存储用户名
$_SESSION["UserName"] = $UserName;
header("location:main.php");
}
}
else
{
header("location:denglu.php");
}
1.main.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<?php
session_start();
// 防止绕过登陆直接进入主界面
if(empty($_SESSION["UserName"]))
{
header("location:denglu.php");
exit;
}
require "DBDA.class1.php";
$db = new DBDA();
$UserName = $_SESSION["UserName"];
?>
<p>
<a href="fabu.php">发布信息</a>
<a href="tuichu.php">退出系统</a>
</p><br /><br />
<h1>留言信息：</h1>
<table width="100%" border="1" >
<tr>
<td>发送人</td>
<td>发送时间</td>
<td>接收人</td>
<td>信息内容</td>
</tr>
<?php
//显示接收者是我的，或者是所有人的
$sql = "select * from liuyan where Recever='{$UserName}' or Recever='suoyou'";
$arr = $db->query($sql);
foreach($arr as $v)
{
echo "<tr>
<td>{$v[1]}</td>
<td>{$v[3]}</td>
<td>{$v[2]}</td>
<td>{$v[4]}</td>
</tr>";
}
?>
</table>
</body>
</html>2 .tuichu.php
<?php
session_start();
unset($_SESSION["UserName"]);
header("location:denglu.php");##3. Send page (fabu.php fabuchuli.php)
1.fabu.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<p>
<a href="main.php">查看信息</a>
<a href="tuichu.php">退出系统</a>
</p>
<h1>信息发送：</h1>
<form action="fabuchuli.php" method="post">
<p>接收人：
<select name="jsr">
<option value="suoyou">所有人</option>
<?php
session_start();
$UserName = $_SESSION["UserName"];
require"DBDA.class1.php";
$db = new DBDA();
//方法一
$sql = "select friend.Friend,yuangong.Name from friend,yuangong where friend.Friend = yuangong.UserName and friend.Me = '{$UserName}'";
$arr = $db->query($sql);
foreach($arr as $v)
{
echo "<option value='{$v[0]}'>{$v[1]}</option>";
}
//方法二
/*$sql = "select Friend from friend where Me ='{$UserName}'";
$arr = $db->query($sql);
foreach($arr as $v)
{
$v[0];
$sname = "select Name from yuangong where UserName = '{$v[0]}'";
$aname = $db->query($sname);
echo"<option value='{$v[0]}'>{$aname[0][0]}</option>";
}*/
?>
</select></p>
<p>信息内容：<textarea name="neirong"></textarea></p>
<input type="submit" value="发送" />
<a href="fabu.php" style="text-decoration:none"><input type="button" value="复位" /></a>
</form>
</body>
</html><?php
session_start();
$UserName = $_SESSION["UserName"];
$jsr = $_POST["jsr"];
$nr = $_POST["neirong"];
$Times = date("Y-m-d H:i:s");
require"DBDA.class.php";
$db = new DBDA();
$sql = "insert into liuyan values('','{$UserName}','{$jsr}','{$Times}','{$nr}')";
$db->query($sql,0);
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