How can I handle the result of SELECT 1 by PHP?

Question

I have this code:

$db
->prepare("SELECT 1
           FROM ( SELECT count(*) AS num_week,
                         sum(date_time > unix_timestamp(DATE_SUB(now(), INTERVAL 1  day))) as num_day,
                         sum(date_time > unix_timestamp(DATE_SUB(now(), INTERVAL 1  hour))) as num_hour,
                         sum(date_time > unix_timestamp(DATE_SUB(now(), INTERVAL 1 minute))) as num_1min
                   FROM resend_pass
                  WHERE user_id   = ?  
                    AND date_time > unix_timestamp(DATE_SUB(now(), INTERVAL 1 WEEK))
                ) a 
           WHERE num_week < 12 AND num_day < 6 AND num_hour < 4 AND num_1min < 1;")
->execute(array($id));

Well how can I use the result of my query? It returns either 1 when all conditions on WHERE clauses are true or nothing when something's wrong. Well I need to know how can handle the result of a query which starts with SELECT 1 ?

Answer 1

You don't even need to know what the result is, since you'll only see a 1 anyway, so all you need to do is see if there were results (and how many): PDOStatement::rowCount

$stmt = $db
->prepare("SELECT 1
           FROM ( SELECT count(*) AS num_week,
                         sum(date_time > unix_timestamp(DATE_SUB(now(), INTERVAL 1  day))) as num_day,
                         sum(date_time > unix_timestamp(DATE_SUB(now(), INTERVAL 1  hour))) as num_hour,
                         sum(date_time > unix_timestamp(DATE_SUB(now(), INTERVAL 1 minute))) as num_1min
                   FROM resend_pass
                  WHERE user_id   = ?  
                    AND date_time > unix_timestamp(DATE_SUB(now(), INTERVAL 1 WEEK))
                ) a 
           WHERE num_week < 12 AND num_day < 6 AND num_day < 4 AND num_1min < 1;");
$stmt->execute(array($id));
if($stmt->rowCount() > 0) {
    // Your code
}

Answer 2

When you are selecting just a single row that contains a single value, you have to use fetchColumn().
Note that you cannot use method chaining for SELECT queries with vanila PDO

$stmt = $db->prepare("SELECT 1 whatever");
$stmt->execute(array($id));
$result = $stmt->fetchColumn();