复制代码 代码如下:

<?php

$dbhost='localhost';

$dbuser='root';

$dbpass='123456';

$dbname='products';

$connect=mysql_connect($dbhost,$dbuser,$dbpass);

if(!$connect) exit('数据库连接失败！');

mysql_select_db($dbname,$connect);

mysql_query('set names utf8');

//查询

$sql="SELECT * FROM `category`";

$result=mysql_query($sql);

while($row=mysql_fetch_array($result)){

echo $row['id'];

}

//插入

$sql="INSERT INTO `category` (`id`,`name`) VALUES (NULL,'".$name."')";

$result=mysql_query($sql);

if(mysql_affected_rows()){

echo '插入成功，插入ID为：',mysql_insert_id();

}else{

echo '插入失败：',mysql_error();

}

//修改

$sql="UPDATE `category` SET `name`='".$name."' WHERE `id`='".$id."'";

$result=mysql_query($sql);

if(mysql_affected_rows()){

echo '修改成功！';

}

//删除

$sql="DELETE FROM `category` WHERE `id`='".$id."'";

$result=mysql_query($sql);

if(mysql_affected_rows()){

echo '删除成功！';

}

//关闭连接

mysql_close($connect);

?>