4.5 1.protected function assign($var,$value=null){ if(is_array($var)){ $this->data=array_merge($this->data,$var); }else{ $this->data[$var]=$value; } }2.// 访客统计 $today=strtotime(date('Y-m-d')); $yesterday=strtotime(date('Y-m-d',strtotime('-1 day')));3.// 今日订单 $data['order_today']=$db->count('order',['atime[>=]'=>$today]); $money_today=$db->sum('order','productmoney',['atime[>=]'=>$today]); $data['money_today']=number_format($money_today,2,'.','');4.排序时如何判断更新,重点在引用了一个变量$num$num=0; foreach ($arr as $k=>$v){ $num+=$db->update('link',['ord'=>$v],['id'=>$k]); } if ($num>0){ $this->success('/admin/link','排序成功！'); }else{ $this->error('/admin/link','排序不成功，请联系管理员！'); }