多层嵌套的使用要点及优化

if (!empty($param['register_from_group'])) {
$register_from = explode(',', $param['register_from_group']);
foreach ($register_from as $key => $val) {
$user_group = self::filter_user($val, $param);
foreach ($user_group as $k => $v) {
$cur_user = User::model()->find('user_id=:user_id', array(':user_id' => $v->user_id));
$user_info[$k]['user_id'] = $v->user_id;
$user_info[$k]['phone'] = $cur_user->user_name;
$user_info[$k]['rid'] = isset($param['rid']) ? $param['rid'] : 0;
$user_info[$k]['id'] = $v->id;
$user_info[$k]['sequence_id'] = $cur_user->sequence_id;
}
$sms = SmsCrontabConfig::model()->find('id=:id and status=1', array('id' => $param['id']));
$sms->uptime = time();
$sms->save();
self::SendReward($user_info, $param);
}
}

优化之后:

if (!empty($param['register_from_group'])) {$register_from = explode(',', $param['register_from_group']);$user_group=array();foreach ($register_from as $key => $val) {$user_group[$key] = self::filter_user($val, $param);}$user_id=array();foreach($user_group as $k => $v) {foreach($v as $ks=>$va){$user_id[$ks]=$va->user_id;}}$criteria=new CDbCriteria();$criteria->select='*';$criteria->addInCondition('user_id',$user_id);$cur_user=User::model()->findAll($criteria);foreach($cur_user as $k=>$v){$user_info[$k]['user_id'] = $v->user_id;$user_info[$k]['phone'] = $v->user_name;$user_info[$k]['rid'] = isset($param['rid']) ? $param['rid'] : 0;$user_info[$k]['id'] = $param['id'];$user_info[$k]['sequence_id'] = $v->sequence_id;$sms = SmsCrontabConfig::model()->find('id=:id and status=1', array('id' => $param['id']));$sms->uptime = time();$sms->save();self::SendReward($user_info, $param);}}