function convert_area($value, $from_unit, $to_unit) { $meter_value = convert_to_square_meters($value, $from_unit); $new_value = convert_from_square_meters($meter_value, $to_unit); return $new_value; }
function convert_area($value, $from_unit, $to_unit) { $square_meter_value = convert_to_square_meters($value, $from_unit); $new_value = convert_from_square_meters($square_meter_value, $to_unit); if (empty($square_meter_value)) { return "Please enter a value."; } else { return $new_value; } }