while ($row = $stmt->fetch(PDO::FETCH_ASSOC))
            {
                $current_month_sales [$row['day_month']] = $row['total_day'];
            }

current_month_sales":{
    "6":"59000.49",
    "8":"566300.00",
    "12":"23600.00",
    "13":"6852941.18",
    "14":"8125630.25",
    "16":"6875763.86",
    "17":"6970420.17"}

current_month_sales = [
                [6, 590000.49],
                [8, 566300.00],
                [12, 236000.00],
                [13, 6852941.18],
                [14, 8125630.25],
                [16, 6875763.86],
                [17, 6970420.17]
            ];