Question

Anybody any idea about this?i don’t know with what to replace the (1 minute) in order to work;
.$checktime['car_date'] is a value in database and is like this 2012-04-14 04:18:14

$time=time();

    $checktime=mysql_num_rows($get_cars);
        if($time<$checktime['car_date'] - (1 minute))
        {
        $sqlhour = mysql_query("DELETE FROM car
                    WHERE car_date < current_timestamp - interval '1' minute;");

        }

Answer 1

I believe that $checktime['car_date'] is the time is seconds. If so 1 minute is:

60

So you would get:

$time=time();

$checktime=mysql_num_rows($get_cars);
   if($time<($checktime['car_date'] - 60)) {
       $sqlhour = mysql_query("DELETE FROM car WHERE car_date < current_timestamp - interval '1' minute;");
    }

Update

Since the $checktime['car_date'] variable is a sql timestamp you should first convert it into seconds since UNIX epoch:

$currentTime = time();
$carDate = new DateTime($checktime['car_date']);

$checktime = mysql_num_rows($get_cars);
   if($time < ($carDate->format('U') - 60)) {
       $sqlhour = mysql_query("DELETE FROM car WHERE car_date < current_timestamp - interval '1' minute;");
    }