JSONArray and mysqlli

//old mysql conn
$json_arr = array("r1" => $row["r1"],"r2" => $row["r2"] );
  echo json_encode( $json_arr );

return :
{"r1":"3610","r2":"0.0000" }

and this is ok.
//

//new mysql conn
when i use mysqlli
  $row = $rs->fetch_all(MYSQLI_ASSOC);
 echo json_encode( $row );

return:
[{"r1":"3610","r2":"0.0000" }]

and this is not work.

What the problem?

//
imediagroupAsked:
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leakim971PluritechnicianCommented:
I don't see any problem
what about :
$row = $rs->fetch_all(MYSQLI_ASSOC);
 echo json_encode( $row[0] );

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imediagroupAuthor Commented:
i need like this     {"r1":"3610","r2":"0.0000" }

but return     [{"r1":"3610","r2":"0.0000" }]


problem []
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imediagroupAuthor Commented:
oh thanks..

problem is   echo json_encode( $row[0] );  and i use  echo json_encode( $row);
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