php中mysql连接和基本操作代码
偶尔要用到php做一些mysql数据库的操作测试,自己写起来太麻烦,搜索的结果一般都又包含一大堆没用的代码,这里将php mysql的操作做一下总结,希望以后用到的时候不用再感到麻烦了。
代码如下:
$dbhost='localhost';//数据库服务器名称
$dbuser='root';// 连接数据库用户名
$dbpass='123456';// 连接数据库密码
$dbname='products';// 数据库的名字
// 连接到数据库
$connect=mysql_connect($dbhost,$dbuser,$dbpass);
if(!$connect) exit('数据库连接失败!');
mysql_select_db($dbname,$connect);
mysql_query('set names utf8');//设置编码
//查询操作
$sql="SELECT * FROM `category`";
$result=mysql_query($sql);
while($row=mysql_fetch_array($result)){
echo $row['id'];
}
//插入操作
$sql="INSERT INTO `category` (`id`,`name`) VALUES (NULL,'".$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();
}
//修改操作
$sql="UPDATE `category` SET `name`='".$name."' WHERE `id`='".$id."'";
$result=mysql_query($sql);
if(mysql_affected_rows()){
echo '修改成功!';
}
//删除操作
$sql="DELETE FROM `category` WHERE `id`='".$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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