登陆界面：
<form action="loginchuli.php" method="post">
<div>用户名：<input type="text" name="uid" /></div>
<div>密码：<input type="text" name="pwd" /></div>
<input type="submit" value="登录" />
</form>
登录处理：
<?php
session_start(); //开启session
$uid = $_POST["uid"];
$pwd = $_POST["pwd"];
include("../DBDA.php");
$db = new DBDA();
$sql = "select count(*) from yuangong where username='{$uid}' and password = '{$pwd}'"; //审核登录
$z = $db->StrQuery($sql);
if($z == 1)
{
$_SESSION["uid"] = $uid;
header("location:main.php");
}
else
{
header("location:login.php");
}
主界面：
<body>
<br /><br />
<a href="fabu.php">发布信息</a> <a href="tuichu.php">退出系统</a>
<br />
<br />
<table width="100%" border="1" cellpadding="0" cellspacing="0">
<tr>
<td>发送人</td>
<td>发送时间</td>
<td>接收人</td>
<td>信息内容</td>
</tr>
<?php
session_start();
if(empty($_SESSION["uid"])) //判断uid是否为空（是否先登录此界面）
{
header("location:login.php");
exit;
}
$uid = $_SESSION["uid"];
include("../DBDA.php");
$db = new DBDA();
$sql = "select * from liuyan where recever='{$uid}' or recever='suoyou'";
$attr = $db->Query($sql);
foreach($attr as $v)
{
//处理发送者姓名
$sqlname = "select Name from yuangong where username='{$v[1]}'";
$name = $db->StrQuery($sqlname);
//处理接收者姓名
$jieshou = "";
if($v[2]=="suoyou")
{
$jieshou = "所有人";
}
else
{
$sqln = "select Name from yuangong where username='{$uid}'"; //显示姓名
$jieshou = $db->StrQuery($sqln);
}
echo "<tr>
<td>{$name}</td>
<td>{$v[3]}</td>
<td>{$jieshou}</td>
<td>{$v[4]}</td>
</tr>";
}
?>
</table>
</body>
发布界面：
<body>
<?php
session_start();
if(empty($_SESSION["uid"])) //判断是否先登录此界面
{
header("location:login.php");
exit;
}
$uid = $_SESSION["uid"];
include("../DBDA.php");
$db = new DBDA();
?>
<br /><br />
<a href="main.php">查看信息</a> <a href="tuichu.php">退出系统</a>
<br />
<h2>信息发送</h2>
<form action="fschuli.php" method="post">
<div>接收人：
<select name="jieshou">
<option value="suoyou">所有人</option>
<?php
$sql = "select firend from firend where me='{$uid}'";
$attr = $db->Query($sql);
foreach($attr as $v)
{
$sqln = "select Name from yuangong where username='{$v[0]}'";
$name = $db->StrQuery($sqln);
echo "<option value='{$v[0]}'>{$name}</option>"; //value为登录用户名，$name为登陆者姓名
}
?>
</select>
</div>
<br />
<div>
信息内容：
<textarea name="neirong">
</textarea>
</div>
<br />
<div>
<input type="submit" value="发送" />
<input type="reset" value="复位" />
</div>
</form>
</body>
发布处理：
<?php
session_start();
include("../DBDA.php");
$db = new DBDA();
$jieshou = $_POST["jieshou"];
$neirong = $_POST["neirong"];
$uid = $_SESSION["uid"];
$time = date("Y-m-d H:i:s"); //时间为datetime格式，取当前时间
$sql = "insert into liuyan values('','{$uid}','{$jieshou}','{$time}','{$neirong}',false)";
if($db->Query($sql,0))
{
header("location:fabu.php");
}
else
{
echo "发布失败！";
}
退出系统：
<?php
session_start();
unset($_SESSION["uid"]); //清除session
header("location:login.php");