php开发_留言板的CRUD(增，删，改，查)操作

项目结构：

添加页面：说明：这里只注重操作，对界面的美工没有下工夫，希望大家理解......

列表页面：

修改页面：

项目中所需的sql：

 1 create database form; 2  3 use form; 4  5 CREATE TABLE `message` ( 6   `id` tinyint(1) NOT NULL auto_increment, 7   `user` varchar(25) NOT NULL, 8   `title` varchar(50) NOT NULL, 9   `content` tinytext NOT NULL,10   `lastdate` date NOT NULL,11   PRIMARY KEY  (`id`)12 ) ENGINE=InnoDB DEFAULT CHARSET=gbk AUTO_INCREMENT=1 ;

conn.php

1 <?php2 $conn = @ mysql_connect("localhost", "root", "") or die("数据库链接错误");3 mysql_select_db("form", $conn);4 mysql_query("set names 'gbk'"); 5 ?>

add.php

 1 <?php 2 include 'conn.php'; 3 if($_POST['submit']){ 4     $sql="INSERT INTO message(id,user,title,content,lastdate) VALUES (NULL, '$_POST[user]', '$_POST[title]', '$_POST[content]', now())"; 5     mysql_query($sql); 6  7     //页面跳转，实现方式为javascript 8     $url = "list.php"; 9     echo "<script language='javascript' type='text/javascript'>";10     echo "window.location.href='$url'";11     echo "</script>";12 }13 ?>14 <script type="text/javascript">15 function checkPost(){16 17     if(addForm.user.value==""){18         alert("请输入用户名");19         addForm.user.focus();20         return false;21     }22     if(addForm.title.value.length<5){23         alert("标题不能少于5个字符");24         addForm.title.focus();25         return false;26         }27 }28 </script>29 <FORM name="addForm" METHOD="POST" ACTION="add.php" onsubmit="return checkPost();">30 用户：<INPUT TYPE="text" NAME="user" /><br />31 标题：<INPUT TYPE="text" NAME="title" /><br />32 内容：<TEXTAREA NAME="content" ROWS="8" COLS="30"></TEXTAREA><br />33 <INPUT TYPE="submit" name="submit" value="add" /></FORM>

list.php

 1 <?php 2 include 'conn.php'; 3 ?> 4 <?php  5 echo "<div align='center'><a href='add.php'>继续添加</a></div>"; 6 ?> 7 <table width=500 border="0" align="center" cellpadding="5" cellspacing="1" bgcolor="#add3ef"> 8 <?php  9 $sql="select * from message order by id";10 $query=mysql_query($sql);11 while ($row=mysql_fetch_array($query)){12 ?>13 14   <tr bgcolor="#eff3ff">15   <td>标题：<font color="red"><?=$row[title]?></font> 用户：<font color="red"><?=$row[user] ?></font><div align="right"><a href="preEdit.php?id=<?=$row[id]?>">编辑</a>&nbsp;&nbsp;|&nbsp;&nbsp;<a href="delete.php?id=<?=$row[id]?>">删除</a></div></td>16   </tr>17   <tr bgColor="#ffffff">18   <td>内容：<?=$row[content]?></td>19   </tr>20   <tr bgColor="#ffffff">21   <td><div align="right">发表日期：<?=$row[lastdate]?></div></td>22   </tr>23   <?php }?>24 </table>

delete.php

 1 <?php 2 include 'conn.php'; 3 $id = $_GET['id']; 4 $query="delete from message where id=".$id; 5 mysql_query($query); 6 ?> 7 <?php  8 //页面跳转，实现方式为javascript 9 $url = "list.php";10 echo "<script language='javascript' type='text/javascript'>";11 echo "window.location.href='$url'";12 echo "</script>";13 ?>

preEdit.php

 1 <?php 2 include 'conn.php'; 3 $id=$_GET[id]; 4 $query="SELECT * FROM message WHERE id =".$id; 5 $result=mysql_query($query); 6 while ($rs=mysql_fetch_array($result)){ 7 ?> 8 <FORM METHOD="POST" ACTION="postEdit.php"> 9     <input type="hidden" name="id" value="<?=$rs[id]?>">10     用户：<INPUT TYPE="text" NAME="user" value="<?=$rs[user]?>"/><br />11     标题：<INPUT TYPE="text" NAME="title" value="<?=$rs[title]?>"/><br />12     内容：<TEXTAREA NAME="content" ROWS="8" COLS="30"><?=$rs[content]?></TEXTAREA><br />13     <INPUT TYPE="submit" name="submit" value="edit"/>14 </FORM>15 <?php }?>

postEdit.php

 1 <?php 2 include 'conn.php'; 3 $query="update message set user='$_POST[user]',title="$_POST[title]",content='$_POST[content]' where id='$_POST[id]'"; 4 mysql_query($query); 5 ?> 6 <?php  7 //页面跳转，实现方式为javascript 8 $url = "list.php"; 9 echo "<script language='javascript' type='text/javascript'>";10 echo "window.location.href='$url'";11 echo "</script>";12 ?>

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