if(isset($_POST['train_worker'])){
        $worker = ($_POST['worker']);
        if(is_numeric($worker)){
            $food_needed = (10 * $worker);
            if($worker <= 0){
                output(" минус или 0!");
            }elseif($stats['food'] < $food_needed){
                output(" недостаточно еды");
            }
            else{
                printf($worker);
                $unit['worker'] += $worker;
                $stats['food'] -= $food_needed;

                $update_worker = mysqli_query(connect(),"UPDATE `unit` SET
                                                        `worker` = '".$unit['worker']."'
                                                        WHERE `id` = '".$_SESSION['uid']."'")
                                                        or die(mysqli_error());
                $update_food = mysqli_query(connect(),"UPDATE `stats` SET
                                                        `food` = '".$stats['food']."'
                                                        WHERE `id` = '".$_SESSION['uid']."'")
                                                        or die(mysqli_error());
                header('location: units.php');
            }
        }
    }