invisio v2.0

<?php
    session_start();
    include("../../../config/main_function.php");

$secure = "cAh3DrJACzw4RbU";
    $connection = connectDB($secure);

$admin_id = mysqli_real_escape_string($connection, $_POST['admin_id']);
    $temp_id = explode(".", $admin_id);
    $admin_id = bigsara_decode($temp_id[0], $temp_id[1]);

if ($connection) {
        $sql = "SELECT update_time FROM tbl_admin WHERE  admin_id = '$admin_id'";
        $res = mysqli_query($connection, $sql);
        $row = mysqli_fetch_assoc($res);
        if () {
            # code...
        }

$update_time = date('Y-m-d H:i:s');
        $sql_login = "UPDATE tbl_admin SET login_status ='0' ,update_time = '$update_time' WHERE  admin_id = '$admin_id'";
        $res_login = mysqli_query($connection, $sql_login);

if ($res_login) {
            $arr['result'] = 1;
        } else {
            $arr['result'] = 0;
        }
    } else {
        $arr['result'] = 9;
    }

mysqli_close($connection);
    echo json_encode($arr);
    ?>