php实现留言板功能:
1 首先是登录页面:
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<!doctype html> <html> <head> <meta charset= "utf-8" > <title>留言板登录</title> <script src= "bootstrap/js/jquery-1.11.2.min.js" ></script> <script src= "bootstrap/js/bootstrap.min.js" ></script> <link href= "bootstrap/css/bootstrap.min.css" rel= "external nofollow" rel= "external nofollow" rel= "external nofollow" rel= "stylesheet" type= "text/css" /> </head> <style> .header{ margin-left: 550px; margin-top: 150px; height: 300px; max-width: 300px; } .xiugai{ max-width: 200px; } .login{ margin-top: 10px; } </style> <body> <form action= "messloginchuli.php" method= "post" > <div class = "header" > <h2>开发部内部留言板</h2> <div class = "input-group xiugai" > <span class = "input-group-addon" >用户名:</span> <input type= "text" class = "form-control" name= "uid" placeholder= "请输入用户名" > </div> <div class = "input-group xiugai" > <span class = "input-group-addon" >口令:</span> <input type= "text" class = "form-control" name= "pwd" placeholder= "请输入口令" > </div> <button type= "submit" class = "btn btn-success login" >登录</button> </div> </form> </body> </html> |
2 登录页面完成后要进入登录处理页面了,也就是上面提交到的messloginchuli.php
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<?php session_start(); // 登录之后要把所包含登录的页面连接起来,开启session $uid = $_post [ "uid" ]; $pwd = $_post [ "pwd" ]; require_once "./dbda.class.php" ; $db = new dbda(); $sql = "select password from yuangong where username='{$uid}'" ; $arr = $db ->query( $sql ,0); //var_dump($arr[0][0]); if ( $arr [0][0]= $pwd && ! empty ( $pwd )){ $_session [ "uid" ]= $uid ; header( "location:message.php" ); } ?> |
登录页面效果如图:
3.登录完成后是进入主页面,也就是显示自己收到的对话内容,下面是设计的数据库的表格和主页面的代码:
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<!doctype html> <html> <head> <meta charset= "utf-8" > <title></title> <script src= "bootstrap/js/jquery-1.11.2.min.js" ></script> <script src= "bootstrap/js/bootstrap.min.js" ></script> <link href= "bootstrap/css/bootstrap.min.css" rel= "external nofollow" rel= "external nofollow" rel= "external nofollow" rel= "stylesheet" type= "text/css" /> </head> <style> .mess{ max-width: 800px; margin-left: 250px; margin-top: 150px; } </style> <body> <?php session_start(); $uid = $_session [ "uid" ]; if ( empty ( $_session [ "uid" ])){ header( "location:messlogin.php" ); exit ; } ?> <div > <a href= "publish_info.php" rel= "external nofollow" >发布信息</a> <a href= "tuichuchuli.php" rel= "external nofollow" >退出系统</a> </div> <table class = "table table-bordered mess" > <caption > 留言信息: </caption> <thead> <tr> <th>发送人</th> <th>发送时间</th> <th>接收人</th> <th>信息内容</th> </tr> </thead> <tbody> <?php require_once "./dbda.class.php" ; $db = new dbda(); $sql = "select * from liuyan where recever='{$uid}' or recever='all'" ; $arr = $db ->query( $sql ,0); foreach ( $arr as $v ){ echo "<tr> <td>{ $v [1]}</td> <td>{ $v [2]}</td> <td>{ $v [3]}</td> <td>{ $v [4]}</td> </tr>"; } ?> </tbody> </table> </body> </html> |
退出登录系统实现用户注销,返回登录页面功能代码如下:
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<?php session_start(); $uid = $_session [ "uid" ]; unset( $uid ); header( "location:messlogin.php" ); ?> |
代码写到这里,比较重要的部分就完成了,下面是要进入发布信息页面了,相当于之前写的添加的页面,其处理页面也是和之前没什么区别的,差别在于现在的处理页面是在用户登录的情况下操作的,需要用session把所有的登录情况下的页面连接起来
主页面效果如图:
4.最后是信息发布页面,可以给任何人发送信息
代码如下:
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<!doctype html> <html> <head> <meta charset= "utf-8" > <title>发布信息界面</title> <script src= "bootstrap/js/jquery-1.11.2.min.js" ></script> <script src= "bootstrap/js/bootstrap.min.js" ></script> <link href= "bootstrap/css/bootstrap.min.css" rel= "external nofollow" rel= "external nofollow" rel= "external nofollow" rel= "stylesheet" type= "text/css" /> </head> <style> .mess{ max-width: 200px; margin-top: 10px; } .mess1{ margin-top: 10px; } .opt{ max-width: 200px; margin-left: 80px; } .txt{ max-width: 200px; } </style> <body> <?php session_start(); $uid = $_session [ "uid" ]; if ( empty ( $_session [ "uid" ])) { header( "location:messlogin.php" ); exit ; } ?> <div > <div > <a href= "message.php" rel= "external nofollow" >查看信息</a> <a href= "seemess.php" rel= "external nofollow" >查看发送信息</a> </div> <form class = "form-horizontal" role= "form" action= "infochuli.php" method= "post" > <div class = "form-group" > <label for = "firstname" class = "col-sm-2 control-label mess1" >接收人:</label> <div class = "form-group " > <select class = "form-control opt" name= "recever" > <option value= "all" >所有人</option> <?php require_once "./dbda.class.php" ; $db = new dbda(); //这里可以给特定的朋友发送信息的sql语句 //$sql = "select firend.firend,yuangong.name from firend,yuangong where firend.firend //= yuangong.username and firend.me = '{$uid}'"; $sname = "select * from yuangong where username not in ('{$uid}')" ; $arr = $db ->query( $sname ,0); //var_dump($arr[0][2]); foreach ( $arr as $v ){ echo "<option value='{$v[0]}'>{$v[2]}</option>" ; } ?> </select> </div> </div> <div class = "form-group" > <label for = "lastname" class = "col-sm-2 control-label mess1" >信息内容:</label> <div class = "col-sm-10" > <textarea class = "form-control txt" rows= "3" name= "content" ></textarea> </div> </div> <div class = "form-group" > <div class = "col-sm-offset-2 col-sm-10" > <button type= "submit" class = "btn btn-default" > 发送 </button> </div> </div> </form> </div> </body> </html> |
发信息页面如图:
5.发布信息完成后要进入处理页面了,也就是提交到的infochuli.php,最后返回发送信息界面
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<?php session_start(); $uid = $_session [ "uid" ]; $recever = $_post [ "recever" ]; $content = $_post [ "content" ]; $arr = $_post [ "recever" ]; $t = date ( "y-m-d h:i:s" ); require_once "./dbda.class.php" ; $db = new dbda(); $sql = "insert into liuyan values('','{$uid}','{$t}','{$recever}','{$content}',0)" ; $arr = $db ->query( $sql ); if ( $arr && ! empty ( $arr )){ header( "location:publish_info.php" ); } else { echo "发送失败!" ; } ?> |
以上这篇使用php连接数据库实现留言板功能的实例讲解(推荐)就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。
原文链接:http://www.cnblogs.com/jly144000/archive/2017/09/11/7506416.html