$dateOfArrival = “20/02/2024”;
$numberOfNights = 2;

// Split the date into day, month, and year
list($day, $month, $year) = explode(‘/’, $dateOfArrival);

// Add the number of nights to the day
$newDay = $day + $numberOfNights;

// Reconstruct the date with the new day
$newDate = $newDay . ‘/’ . $month . ‘/’ . $year;

return $newDate;