1 <?php 2     //mysqli扩展库操作mysql数据库，面向对象 3     $mysqli=new MySQLi("localhost","root","root","test"); 4     if($mysqli->connect_error){ 5         die("连接数据库失败".$mysqli->connect_error); 6     } 7     $sql="select * from user1"; 8     $res=$mysqli->query($sql); 9     while($row=$res->fetch_row()){10         foreach($row as $key=>$val){11             echo "--".$val;12         }13         echo "<br/>";14     }15     $res->free();16     $mysqli->close();17 ?>

 1 <?php 2     //mysqli扩展库操作mysql数据库，面向对象 3     $mysqli=new MySQLi("localhost","root","root","test"); 4     if($mysqli->connect_error){ 5         die("连接数据库失败".$mysqli->connect_error); 6     } 7     //$sql="insert into user1 (name,password,age,birthday) values (‘wpp‘,md5(‘wpp‘),25,‘1991-05-05‘)"; 8     //$sql="update user1 set age=24 where name=‘wpp‘"; 9     $sql="delete from user1 where name=‘wpp‘";10     $res=$mysqli->query($sql);11     if(!$res){12         echo "操作失败".$mysqli->error;13     }else{14         if($mysqli->affected_rows>0){15             echo "操作成功";16         }else{17             echo "没有行受到影响";18         }19     }20     $mysqli->close();21 ?>