php-删除Json输出的引号

删除json输出的双引号：
[{"id":"1","nom":"Magasin Jardins 2","ville":"Paris","latlng":["36.85715,10.127245"]}

latlng值：[36.85715,10.127245]

代码：

  $qry = "SELECT *FROM magasin";    $result = mysql_query($qry);  //  $promotions = array();    $response = array();    while($row = mysql_fetch_assoc($result)) {   // $promotions[]= $row; $magasin = array();        $magasin["id"] = $row["id"];        $magasin["nom"] = $row["nom"];        $magasin["ville"] = $row["ville"];        $lat = $row[latitude];        $long = $row[longitude];       $magasin["latlng"][] =floatval($lat).",".floatval($long);;  // push single product into final response array        array_push($response, $magasin);    }     mysql_close($con);  echo json_encode($response);