function _getFields()
{
$memberFields = array('first_name', 'last_name', 'gender', 'age_bracket', 'congregationid', 'email', 'mobile_tel', 'work_tel', 'familyid', 'family_name', 'address_street', 'address_suburb', 'address_state', 'address_postcode', 'home_tel');
$p = new Person();
foreach ($p->_getFields() as $k => $v) {
if (in_array($k, $memberFields)) {
$res[$k] = $v;
}
}
$f = new Family();
foreach ($f->_getFields() as $k => $v) {
if (in_array($k, $memberFields)) {
$res[$k] = $v;
}
}
return $res;
}