$register_policy = defaults($data, 'register_policy', REGISTER_CLOSED);
if (in_array($register_policy, ['REGISTER_CLOSED', 'REGISTER_APPROVE', 'REGISTER_OPEN'])) {
$register_policy = constant($data['register_policy']);
$register_policy = defaults($data, 'register_policy', REGISTER_CLOSED);
if (in_array($register_policy, ['REGISTER_CLOSED', 'REGISTER_APPROVE', 'REGISTER_OPEN'])) {
$register_policy = constant($data['register_policy']);