php操作mysql数据库的基本类

代码如下

复制代码

<?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);

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