protected function validatePhone(FormInterface $form, TransferInformation $data)
{
$phoneDigits = 10;
$phoneNum = str_replace(array(' ', '-', '(', ')'), '', $data->getPhoneNumber());
if (!is_numeric($phoneNum)) {
$form->get('phone_number')->addError(new FormError("Enter correct phone number."));
} elseif (strlen($phoneNum) != $phoneDigits) {
$form->get('phone_number')->addError(new FormError("Phone number must be {$phoneDigits} digits."));
} else {
$data->setPhoneNumber($phoneNum);
}
}
