public static function isSubscribed($kshow_id, $kuser_id, $subscription_type = null) { $c = new Criteria(); $c->add(KshowKuserPeer::KSHOW_ID, $kshow_id); $c->add(KshowKuserPeer::KUSER_ID, $kuser_id); if ($subscription_type !== null) { $c->add(KshowKuserPeer::SUBSCRIPTION_TYPE, $subscription_type); } return KshowKuserPeer::doSelectOne($c); }