/**
* Get the list of contact_id.
*
*
* @return int
* contact_id on success, null otherwise
*/
public static function getContactIDs()
{
$id = array();
$dao = new CRM_Core_DAO_UFMatch();
$dao->find();
while ($dao->fetch()) {
$id[] = $dao->contact_id;
}
return $id;
}
