php操作数据库

 string(1) "1" ["username"]=> string(4) "1111" ["password"]=> string(4) "2222" } 
//$row = mysqli_fetch_row($result);//{ [0]=> string(1) "1" [1]=> string(4) "1111" [2]=> string(4) "2222" } 
var_dump($row);
echo '链接成功';
mysqli_close($con);