php简单的操作数据库

//1,连接数据库 
$conn = mysql_connect(‘localhost’,’root’,’root’); 
if(!$conn){ 
die(“连接失败”.mysql_error); 
} 

//2,选择数据库 
mysql_select_db(“test”); 

//3,发送操作语句 
$sql=”select * from user”; 

//4,接收结果 
$res=mysql_query($sql,$conn); 

//5,遍历结果 
while($row=mysql_fetch_row($res)){ 
echo “
$row[0]–$row[1]–$row[2]”; 
} 

        //6,关闭 
        mysql_free_result($res); 
        mysql_close($conn); 

?>