PHP Mysql method to implement database addition, deletion, modification and query: 1. Create the entry file [index.html] to connect to the database and query data; 2. Click the Add button and add data through [addnews.html]; 3. Click Delete button, delete through the server file [action-del.php].
PHP Mysql method to implement database addition, deletion, modification and query:
1. Query the database
1.1. Create the file dbconfig.php and save the constants
<?php define("HOST","localhost"); define("USER","root"); define("PASS","********"); define("DBNAME","news");
1.2. Create the entry file index.html
(connect to the database and query data)
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>新闻后台管理系统</title> </head> <style type="text/css"> .wrapper {width: 1000px;margin: 20px auto;} h2 {text-align: center;} .add {margin-bottom: 20px;} .add a {text-decoration: none;color: #fff;background-color: green;padding: 6px;border-radius: 5px;} td {text-align: center;} </style> <body> <div> <h2>新闻后台管理系统</h2> <div> <a href="addnews.html">增加新闻</a> </div> <table width="960" border="1"> <tr> <th>ID</th> <th>标题</th> <th>关键字</th> <th>作者</th> <th>发布时间</th> <th>内容</th> <th>操作</th> </tr> <?php // 1.导入配置文件 require "dbconfig.php"; // 2. 连接mysql $link = @mysql_connect(HOST,USER,PASS) or die("提示:数据库连接失败!"); // 选择数据库 mysql_select_db(DBNAME,$link); // 编码设置 mysql_set_charset('utf8',$link); // 3. 从DBNAME中查询到news数据库,返回数据库结果集,并按照addtime降序排列 $sql = 'select * from news order by id asc'; // 结果集 $result = mysql_query($sql,$link); // var_dump($result);die; // 解析结果集,$row为新闻所有数据,$newsNum为新闻数目 $newsNum=mysql_num_rows($result); for($i=0; $i<$newsNum; $i++){ $row = mysql_fetch_assoc($result); echo "<tr>"; echo "<td>{$row['id']}</td>"; echo "<td>{$row['title']}</td>"; echo "<td>{$row['keywords']}</td>"; echo "<td>{$row['autor']}</td>"; echo "<td>{$row['addtime']}</td>"; echo "<td>{$row['content']}</td>"; echo "<td> <a href='javascript:del({$row['id']})'>删除</a> <a href='editnews.php?id={$row['id']}'>修改</a> </td>"; echo "</tr>"; } // 5. 释放结果集 mysql_free_result($result); mysql_close($link); ?> </table> </div> <script type="text/javascript"> function del (id) { if (confirm("确定删除这条新闻吗?")){ window.location = "action-del.php?id="+id; } } </script> </body> </html>
The page is as shown:
#2. Add news
2.1 Click the Add button to go through the pageaddnews.html
Add data
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>添加新闻</title> </head> <style type="text/css"> form{ margin: 20px; } </style> <body> <form action="action-addnews.php" method="post"> <label>标题:</label><input type="text" name="title"> <label>关键字:</label><input type="text" name="keywords"> <label>作者:</label><input type="text" name="autor"> <label>发布时间:</label><input type="date" name="addtime"> <label>内容:</label><input type="text" name="content"> <input type="submit" value="提交"> </form> </body> </html>
2.2 Create a server file to handle adding newsaction-addnews.php
<?php // 处理增加操作的页面 require "dbconfig.php"; // 连接mysql $link = @mysql_connect(HOST,USER,PASS) or die("提示:数据库连接失败!"); // 选择数据库 mysql_select_db(DBNAME,$link); // 编码设置 mysql_set_charset('utf8',$link); // 获取增加的新闻 $title = $_POST['title']; $keywords = $_POST['keywords']; $autor = $_POST['autor']; $addtime = $_POST['addtime']; $content = $_POST['content']; // 插入数据 mysql_query("INSERT INTO news(title,keywords,autor,addtime,content) VALUES ('$title','$keywords','$autor','$addtime','$content')",$link) or die('添加数据出错:'.mysql_error()); header("Location:demo.php");
3. Delete News
Click the delete button and delete it through the server fileaction-del.php
<?php // 处理删除操作的页面 require "dbconfig.php"; // 连接mysql $link = @mysql_connect(HOST,USER,PASS) or die("提示:数据库连接失败!"); // 选择数据库 mysql_select_db(DBNAME,$link); // 编码设置 mysql_set_charset('utf8',$link); $id = $_GET['id']; //删除指定数据 mysql_query("DELETE FROM news WHERE id={$id}",$link) or die('删除数据出错:'.mysql_error()); // 删除完跳转到新闻页 header("Location:demo.php");
4. Modify news
4.1 Click the modify button and jump to the file editnews.php
for modification
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>修改新闻</title> </head> <body> <?php require "dbconfig.php"; $link = @mysql_connect(HOST,USER,PASS) or die("提示:数据库连接失败!"); mysql_select_db(DBNAME,$link); mysql_set_charset('utf8',$link); $id = $_GET['id']; $sql = mysql_query("SELECT * FROM news WHERE id=$id",$link); $sql_arr = mysql_fetch_assoc($sql); ?> <form action="action-editnews.php" method="post"> <label>新闻ID: </label><input type="text" name="id" value="<?php echo $sql_arr['id']?>"> <label>标题:</label><input type="text" name="title" value="<?php echo $sql_arr['title']?>"> <label>关键字:</label><input type="text" name="keywords" value="<?php echo $sql_arr['keywords']?>"> <label>作者:</label><input type="text" name="autor" value="<?php echo $sql_arr['autor']?>"> <label>发布时间:</label><input type="date" name="addtime" value="<?php echo $sql_arr['addtime']?>"> <label>内容:</label><input type="text" name="content" value="<?php echo $sql_arr['content']?>"> <input type="submit" value="提交"> </form> </body> </html>
4.2 Through the server file action-editnews.php
Modification processing
Modification processing through the server file action-editnews.php
<?php // 处理编辑操作的页面 require "dbconfig.php"; // 连接mysql $link = @mysql_connect(HOST,USER,PASS) or die("提示:数据库连接失败!"); // 选择数据库 mysql_select_db(DBNAME,$link); // 编码设置 mysql_set_charset('utf8',$link); // 获取修改的新闻 $id = $_POST['id']; $title = $_POST['title']; $keywords = $_POST['keywords']; $autor = $_POST['autor']; $addtime = $_POST['addtime']; $content = $_POST['content']; // 更新数据 mysql_query("UPDATE news SET title='$title',keywords='$keywords',autor='$autor',addtime='$addtime',content='$content' WHERE id=$id",$link) or die('修改数据出错:'.mysql_error()); header("Location:demo.php");
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