How to access array value of count - laravel

Question

How do I access the value of the array of COUNT(*)? I get the error Cannot use object of type stdClass as array when i tried to use $availableRooms[3]['COUNT(*)']
Array
(
[0] => stdClass Object
(
[category] => king
[COUNT(*)] => 3
)
[1] => stdClass Object
(
[category] => family
[COUNT(*)] => 7
)
[2] => stdClass Object
(
[category] => quad
[COUNT(*)] => 8
)
[3] => stdClass Object
(
[category] => standard
[COUNT(*)] => 7
)
)
I need to get the value of count. In this case when i use $availableRooms[3]['COUNT(*)'] it should output 7
**EDIT**
Query
$availableRooms = DB::select("SELECT
category, COUNT(*)
FROM available_rooms
WHERE NOT EXISTS (
-- room is booked on the requested dates (...not)
SELECT 1
FROM room_reserveds
JOIN bookings ON room_reserveds.bookingID = bookings.bookingID
WHERE room_reserveds.roomID = available_rooms.roomID
AND $checkOutDate > checkIndate
AND $checkInDate < checkOutDate
)
GROUP BY category");

Answer 1

The array contains objects, so you can't use the array notation to get these properties. And because it's a special key, you can get the property by placing the name between {} as a string.
$availableRooms[3]->{'COUNT(*)'};
I suppose this results comes from a database query. A better solution would be to give this result an alias that can be referenced directly.
// SQL:
SELECT COUNT(*) AS count FROM ...
// PHP:
$availableRooms[3]->count;