Read and delete news list

Implementation code

1. First write a separate PHP file (conn.php) to connect MySQL database

//*******************PHP连接MySQL数据库********************
<?php
//声明PHP输出数据的字符集
header("content-type:text/html;charset=utf-8");

//0.数据库配置信息
$db_host = "localhost:3306";
$db_user = "root";
$db_pwd = "yeoman";
$db_name = "yeoman92";

//1.PHP连接MySQL服务器
$link = @mysql_connect($db_host, $db_user, $db_pwd);
if(!$link){
    echo "MySQL服务器连接失败！".mysql_error();
    exit();
}

//2.选择数据库
if(!mysql_select_db($db_name, $link)){
    echo "选择{$db_name}数据库失败！".mysql_error();
    exit();
}

//3.设置MySQL返回的数据字符集
mysql_query("set names utf8");

?>

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Function Explanation:
header()

Description: Send a custom http message, in other words: the format of the data returned by PHP or character set.
Syntax: void header (string $string)
Example:

header(“content-type:text/html;charset=utf-8”) //Set the character set of data returned by PHP
header(“location:http:www .sina.com.cn”); //Web page jump

2. Write the main file (index.php)

<?php

//包含连接MySQL的文件，即文件引入
include "conn.php";

//执行查询的语句
$sql = "SELECT * FROM 007_news ORDER BY id DESC";
$result = mysql_query($sql); //返回的是结果集

?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>新闻列表</title>
<script type="text/javascript">function confirmDel(id){
    //询问是否删除记录
    if(window.confirm("你确定要删除吗？")){        
    //跳转到PHP的删除页面 del.php
        location.href = "del.php?id="+id;
    }
}
</script>
</head>
<body>
<table width="70%" border="1" bordercolor="#CCC" rules="all" align="center" cellpadding="5">
    <tr bgcolor="#efefef">
        <th>编号</th>
        <th>新闻标题</th>
        <th>作者</th>
        <th>来源</th>
        <th>排序</th>
        <th>点击率</th>
        <th>发布日期</th>
        <th>操作选项</th>
    </tr>
    <?php 
    $str = "";
    while($arr = mysql_fetch_array($result,MYSQL_ASSOC)){    //输出表格内容
        $str .= "<tr>\n";
        $str .= "	<td>".$arr[&#39;id&#39;]."</td>\n";
        $str .= "	<td>".$arr[&#39;title&#39;]."</td>\n";
        $str .= "   <td>".$arr[&#39;author&#39;]."</td>\n";
        $str .= "	<td>".$arr[&#39;source&#39;]."</td>\n";
        $str .= "	<td>".$arr[&#39;orderby&#39;]."</td>\n";
        $str .= "	<td>".$arr[&#39;hits&#39;]."</td>\n";
        $str .= "	<td>".date("Y-m-d  H:i", $arr[&#39;addate&#39;])."</td>\n";
        $str .= "	<td><a href=&#39;javascript:void(0)&#39;>修改</a> 
        <a href=&#39;javascript:void(0)&#39; onClick=&#39;confirmDel(".$arr[&#39;id&#39;].")&#39;>删除</a></td>\n";
        $str .= "</tr>\n";     
    }
    echo $str;
    ?></table></body></html>

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Explanation of syntax structure

1. Include syntax structure, (not a function)

Description: Include and run the specified file.
Syntax: include $filename or include($filename)
Example: include “include/conn.php”

2. require syntax structure

If the included file does not exist, include will report a warning error and the script will continue to run below.
And require will report a fatal error and the script will terminate execution immediately.
Description: Include and run the specified file.
Syntax: require $filename or require($filename)
Example: require “include/conn.php”
Note: include and require both include and run files, but there is a difference.

For details on how to introduce files in PHP, please see: Four ways to introduce files in PHP and their differences

##3 . Write the file to delete the record (del.php)

<?php

//包含连接MySQL的文件，即文件引入
include "conn.php";

//执行查询的语句
$sql = "SELECT * FROM 007_news ORDER BY id DESC";
$result = mysql_query($sql); //返回的是结果集

?>

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>新闻列表</title>

<script type="text/javascript">
function confirmDel(id){
    //询问是否删除记录
    if(window.confirm("你确定要删除吗？")){
        //跳转到PHP的删除页面 del.php
        location.href = "del.php?id="+id;
    }
}
</script>

</head>

<body>
<table width="70%" border="1" bordercolor="#CCC" rules="all" align="center" cellpadding="5">
    <tr bgcolor="#efefef">
        <th>编号</th>
        <th>新闻标题</th>
        <th>作者</th>
        <th>来源</th>
        <th>排序</th>
        <th>点击率</th>
        <th>发布日期</th>
        <th>操作选项</th>
    </tr>
    <?php 
    $str = "";
    while($arr = mysql_fetch_array($result,MYSQL_ASSOC)){    //输出表格内容
        $str .= "<tr>\n";
        $str .= "	<td>".$arr[&#39;id&#39;]."</td>\n";
        $str .= "	<td>".$arr[&#39;title&#39;]."</td>\n";
        $str .= "   <td>".$arr[&#39;author&#39;]."</td>\n";
        $str .= "	<td>".$arr[&#39;source&#39;]."</td>\n";
        $str .= "	<td>".$arr[&#39;orderby&#39;]."</td>\n";
        $str .= "	<td>".$arr[&#39;hits&#39;]."</td>\n";
        $str .= "	<td>".date("Y-m-d  H:i", $arr[&#39;addate&#39;])."</td>\n";
        $str .= "	<td><a href=&#39;javascript:void(0)&#39;>修改</a> 
        <a href=&#39;javascript:void(0)&#39; onClick=&#39;confirmDel(".$arr[&#39;id&#39;].")&#39;>删除</a></td>\n";
        $str .= "</tr>\n";     
    }
    echo $str;
    ?>
</table>
</body>
</html>

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Detailed explanation of operating MySQL database with PHP (2)

Business process for deleting news records

Detailed explanation of operating MySQL database with PHP (2)

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