PHP练习4 留言板

一、要求

二、示例页面

三、网页代码及网页显示

1.denglu.php 登录页面

<!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>
<style type="text/css">
*{ margin:0px auto; padding:0px}
#aa{ width:400px; height:89px; font-size:36px; color:#39F; text-align:center; line-height:89px; vertical-align:middle; border-bottom:1px solid #999}
.bb{ width:400px; height:59px}
.cc{ width:159px; height:59px; float:left; font-size:20px; text-align:right; line-height:59px; vertical-align:middle}
.dd{ width:200px; height:59px; float:left}
.ee{ width:150px; height:30px; text-align:center; margin-top:15px}
.ff{ width:80px; height:30px}
</style>
</head>

<body>
<form action="dengluchuli.php" method="post">
<div style="400px; height:259px; margin-top:100px; border:1px solid #999">
    <div id="aa">汉企网络0904留言板</div>
    <div class="bb">
        <div class="cc">用户名：</div>
        <div class="dd"><input id="yonghuming" class="ee" type="text" name="uid" /></div>
    </div>
    <div class="bb">
        <div class="cc">密码：</div>
        <div class="dd"><input class="ee" type="password" name="pwd" /></div>
    </div>
    <div style="400px; height:50px; text-align:center; margin-top:10px">
        <input class="ff" type="submit" value="登录" />
        <input class="ff" type="button" value="复位" onclick="Fuwei()" />
    </div>
</div>
</form>
</body>
<script type="text/javascript">
function Fuwei()
{
    document.getElementById("yonghuming").value = "";
}
</script>
</html>

2.dengluchili.php 登录处理页面

<?php
session_start();
$UserName = $_POST["uid"];

$PassWord = $_POST["pwd"];

include("DBDA.class.php");
$db = new DBDA();
$sql = "select PassWord from yuangong where UserName='$UserName'";

$mm = $db->StrQuery($sql);

if($PassWord !="" && $PassWord==$mm)
{
    $_SESSION['views']=$UserName;
    header("location:main.php");
}
else
{
    echo "用户名或密码输入错误";
}

3.main.php 主页面，显示所有的信息。

<?php
session_start();
?>

<!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

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

$sall = "select count(*) from liuyan";
$total = $db->StrQuery($sall);

include("../page.class.php");
$page = new Page($total,20);

$sql = "select * from liuyan ".$page->limit;

$result = $db->Query($sql);

foreach($result as $v)
{
}
?>

<br />
<div><a href="fabuxinxi.php">发布信息</a>&nbsp;&nbsp;<a href="tuichuchuli.php">退出系统</a></div>
<br />
<table width="50%" border="1" cellpadding="0" cellspacing="0">
    <tr>
        <td>发送人</td>
        <td>接收人</td>
        <td>发送时间</td>
        <td>信息内容</td>
    </tr>

<?php 
foreach($result as $v)
{
    echo "<tr><td>$v[1]</td><td>$v[2]</td><td>$v[3]</td><td>$v[4]</td></tr>";
}
    ?>
</table>
<?php
echo $page->fpage();//显示表格下方的数据和页面的信息。
if(empty($_SESSION["views"]))
{
    header("location:denglu.php");
    exit;
}
?>

</body>
</html>

4.fabuxinxi.php 发布信息页面

<?php
session_start();
?>

<!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>
<style type="text/css">
*{ margin:0px; padding:0px}
.aa{ width:300px; height:40px; border:2px solid #999; border-bottom:0px; text-align:center; line-height:40px; vertical-align:middle}
.bb{ width:80px; height:30px}
#text1{ float:left; margin-top:10px; width:150px; height:20px; margin-left:2px}
</style>
</head>
<body>
<form action="fabuxinxichuli.php" method="post" onclick="return true">
<div style="position:relative; left:100px; top:40px">
    <div><a href="chakanxinxi.php">查看信息</a>&nbsp;&nbsp;<a href="tuichuchuli.php">退出系统</a></div>
    <br />
    <div class="aa">
        <div style="float:left; 100px; height:40px; text-align:right">接收人：</div>
        <!--<input id="text1" type="text" name="jieshouren" />-->
        <select name="jishouren" style="100px; height:25px; margin-top:8px; margin-left:-100px">
            <option selected="selected">所有人</option>

 <?php
 include("DBDA.class.php");
 $db = new DBDA();
 $sql = "select firend from firend";
 $result = $db->Query($sql);
 foreach($result as $v)
 {
     echo "<option>$v[0]</option>";
 }
 ?>

        </select>
    </div>
    <div class="aa" style="height:90px">
        <div style="float:left; 100px; height:90px; text-align:right; line-height:90px; vertical-align:middle">信息内容：</div>
        <div style="text-align:left"><textarea id="text2" name="xinxineirong" style="margin-top:4px; height:80px"></textarea></div>
    </div>
    <div class="aa" style="border-bottom:2px solid #999">
        <input class="bb" type="submit" value="发送" />
        <input class="bb" type="button" value="复位" onclick="Fuwei()" />
    </div>
</div>
</form>

<?php
if(empty($_SESSION["views"]))
{
    header("location:denglu.php");
}

?>
</body>
<script type="text/javascript">
function Fuwei()
{
    document.getElementById("text1").value = "";
    document.getElementById("text2").value = "";
}
</script>
</html>

5.fabuxinxichuli.php 发布信息处理页面

<?php
session_start();
$fasongren = $_SESSION['views'];
$time = date("Y-m-d h:i:s");
$jieshouren = $_POST["jieshouren"];
$xinxineirong = $_POST["xinxineirong"];

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

$sql ="insert into liuyan values('','{$fasongren}','{$jieshouren}','{$time}','{$xinxineirong}')";
$db->Query($sql,0);
if(empty($_SESSION["views"]))
{
    header("location:denglu.php");
}
else
{
    header("location:main.php");
}

6.chakanxinxi.php 只显示和登陆者有关系的信息

<?php
session_start();
?>

<!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
$sender = $_SESSION['views'];
$Recever = $_SESSION['views'];
include("DBDA.class.php");
$db = new DBDA();

$sall = "select count(*) from liuyan";
$total = $db->StrQuery($sall);

include("../page.class.php");
$page = new Page($total,20);

$sql = "select * from liuyan where Sender='$sender' or Recever='$Recever' ".$page->limit;

$result = $db->Query($sql);

foreach($result as $v)
{
}
?>

<br />
<div><a href="fabuxinxi.php">返回</a></div>
<br />
<table width="50%" border="1" cellpadding="0" cellspacing="0">
    <tr>
        <td>发送人</td>
        <td>接收人</td>
        <td>发送时间</td>
        <td>信息内容</td>
    </tr>

<?php 
    foreach($result as $v)
    {
        echo "<tr><td>$v[1]</td><td>$v[2]</td><td>$v[3]</td><td>$v[4]</td></tr>";
    }
    ?>

</table>

<?php
echo $page->fpage();//显示表格下方的数据和页面的信息。
if(empty($_SESSION["views"]))
{
    header("location:denglu.php");
    exit;
}
?>

</body>
</html>

7.tuichuchuli.php 退出系统，清空session。

<?php
session_start();

unset($_SESSION);

session_destroy();
 
header("location:denglu.php");

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原文地址：https://www.cnblogs.com/Strive-count/p/6041446.html