PHP mysqli 增删改查（一）

$mysql_server_name="localhost"; //数据库服务器名称
    $mysql_username="root"; // 连接数据库用户名
    $mysql_password="111111"; // 连接数据库密码
    $mysql_database="test"; // 数据库的名字
    $mysql_prot = "3306";

    $mysqli = new mysqli($mysql_server_name,$mysql_username,$mysql_password,$mysql_database);
    if($mysqli){
        echo "mysqli success"."
";
    }else{
        echo "mysqli error"."
";
    }
    $query = "select * from user";

//查询name字段
    $sql1 = "select * from user WHERE id = 0";

//插入数据
    $sqlInsert = "insert into user (id,name) values('6','hah')";
//删除数据
    $sqldelete = "delete from user where id = 6";
//修改数据
    //$sqlUpdate = "update user set name = 'weizhi2' where name = 'iceboy'";
    $sqlUpdate = "update user set id = 5 where id = 0";


//    $res = $mysqli->query($sql1);
//    $res = $mysqli->query($sqlInsert);
    //$res = $mysqli->query($sqldelete);
    $res = $mysqli->query($sqlUpdate);



    echo $mysqli->affected_rows;

    if($res){
        echo "query success"."
";

//        三种处理查询结果
        //喜欢使用后面两种方法

        //  方法一
//        while(list($id,$name)=$res->fetch_row()){
//            echo "id: ".$id." name:".$name."
";
//        }
        //  方法二
//        while($row = $res->fetch_object()){
//            echo "id:".$row->id." name:".$row->name."
";
//
//        }

        //方法三
//        while ($row = $res->fetch_assoc()){
//            echo "id:".$row["id"]." name:".$row["name"]."
";
//        }
    }else{
        echo "query error"."
";
    }

    //$res->free();
    $mysqli->close();
?>