public function index() { $smsClient = new SmsClient(); $fee = $smsClient->getEachFee(); $balance = $smsClient->getBalance(); if (empty($fee)) { $this->assign('fee', '异常'); } else { $this->assign('fee', $fee); } $this->assign('balance', $balance); if (!empty($fee)) { $this->assign('balancecnt', $balance / $fee); } else { $this->assign('balancecnt', '异常'); } $this->display(); }