从JSON获取嵌套数组

Question

This is my JSON.
Stored in variable named $onceBooking .

I want to get booking_slots from each booking .

This is my code:

for ($i = 0; $i < count($onceBooking); $i++) {
    if (count($onceBooking[$i]->bookings) == 0) {
        $onceBooking[$i]->total_days = 0;
    } else {
        $onceBooking[$i]->total_days = count($onceBooking[$i]->bookings);
        $bookings = $onceBooking[$i]->bookings;
        for ($j = 0; $j < count($bookings); $j++) {
            return $bookings[$j]->booking_slots;
        }
    }
}

But it's returning nothing. Please tell me if I am wrong.
Thanks.

Answer 1

$data = json_decode($onceBooking);

Then you can loop through data to grab your booking objects.

$result = ["total_days" => 0];

foreach($data as $instance) {
    $result["total_days"] += count($instance->bookings);
    $bookings = $instance->bookings;
    for($i = 0; $i < count($bookings); $i++) {
        return $bookings->booking_slots;
    }
}

-- EDIT: for returning total days & bookings.

$result = ["total_days" => 0, "bookings" => []];

foreach($data as $instance) {
    $result["total_days"] += count($instance->bookings);
    array_push($result["bookings"], $instance->$bookings);
}

return $result;

Answer 2

You have to modify the code a little bit because you are returning the first element's booking slot.

$data = json_decode($onceBooking);
$bookingSlots = array();
for ($i = 0; $i < count($onceBooking); $i++) {
    if (count($onceBooking[$i]->bookings) == 0) {
        $onceBooking[$i]->total_days = 0;
    } else {
        $onceBooking[$i]->total_days = count($onceBooking[$i]->bookings);
        $bookings = $onceBooking[$i]->bookings;
        for ($j = 0; $j < count($bookings); $j++) {
            if (!empty($bookings[$j])) {
                $bookingSlots[$bookings[$j]->id] = $bookings[$j]->booking_slots;
            }
        }
    }
}
return $bookingSlots;

Hope this helps.