code: public function onHandler($r, $e)
      {
          if (isset($r['isIgnoreError']) && $r['isIgnoreError'] === true) {
              return;
          }
          if (!empty($r['responseData'])) {
              array_merge($r, $r['responseData']);
          }
          if (isset($r['responseData'])) unset($r['responseData']);
          if (!$this->isDevelopment()) {
              if (isset($r['debug'])) unset($r['debug']);
              if (isset($r['isIgnoreError'])) unset($r['isIgnoreError']);
          }
          return $this->echoStr($r);
      }
docs: [onHandler 监听错误]
  @author: 桦 <yuchonghua@163.com>
  @DateTime 2017-04-26T18:55:58+0800
  @return   [type]                   [description]