留言板案例

Posted kevin2016

tags:

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登录界面：


<body>
<h1>登录界面</h1>
<form action="chuli.php" method="post">
<div >
开发部内部留言板
</div>
<div >用户名：<input type="txt" name="yh" /></div>
<div >口令：<input type="txt" name="mm" /></div>
<div ><input type="submit" value="登录" />
<input type="reset" value="复位" /></div>

</form>
</body>





chuli.php
<?php
session_start();
$username = $_POST["yh"];
$password = $_POST["mm"];

include("../DBDA.class.php");
$db = new DBDA();
$sql = "select count(*) from yuangong where username = ‘{$username}‘ and password = ‘{$password}‘";
$r = $db->StrQuery($sql);
if($r==1)//判断用户名，密码是否存在
{
    $_SESSION["username"] = $username;
    header("location:main.php");
}
else
{
    header("location:log.php");
}






主界面：main.php
<body>
<a href="xinxi.php">发布消息</a>&nbsp;&nbsp;
<a href="tuichu.php">退出系统</a>
<h1>留言信息：</h1>
<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["username"]))
{
    header("location:log.php");
    exit;
}

$username = $_SESSION["username"];

include("../DBDA.class.php");
$db = new DBDA();
$sql = "select * from liuyan where recever=‘{$username}‘ 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
    {
    $sqln = "select Name from yuangong where username=‘{$username}‘";
    $jieshou = $db->StrQuery($sqln);
    }
    
    echo "<tr><td>{$name}</td><td>{$v[3]}</td><td>{$jieshou}</td><td>{$v[4]}</td></tr>";  
}


?>
</table>
</body>





留言板页面：xinxi.php
<body>
<?php
session_start();
if(empty($_SESSION["username"]))
{
    header("location:log.php");
    exit;
}

$username = $_SESSION["username"];

include("../DBDA.class.php");
$db = new DBDA();


?>
<a href="main.php">查看信息</a>&nbsp;&nbsp;
<a href="tuichu.php">退出系统</a>
<h1>信息发送</h1>
<form action="xinxichuli.php" method="post">
<div>接收人：
    <select name="jieshou">
    <option value="suoyou">所有人</option>
    <?php
    $sql = "select friend from friend where me=‘{$username}‘";
    $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>";
    }
    
    
    
    
    ?>
    
    </select>

</div>

<div>
    信息内容：
    <textarea name="xinxi">
    
    
    </textarea>

</div>
<div>
    <input type="submit" value="发送" />
    <input type="reset" value="复位" />
</div>
</form>



</body>





xinxichuli.php;
<?php
session_start();

include("../DBDA.class.php");
$db = new DBDA();

$jieshou = $_POST["jieshou"];
$xinxi = $_POST["xinxi"];

$username = $_SESSION["username"];

$time = date("Y-m-d H:i:s");

$sql = "insert into liuyan values (‘‘,‘{$username}‘,‘{$jieshou}‘,‘{$time}‘,‘{$xinxi}‘,‘‘)";

if($db->Query($sql,0))
{
    header("location:xinxi.php");
}
else
{
    echo "发布失败";
}






tuichu.php
<?php
session_start();
unset($_SESSION["username"]);
header("location:log.php");

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