thinkphp中try catch的运用

 public function doedit_set(){
     $info=$this->_post("info");
     $id=$this->_post("id");//dump($info);exit();
     $user=DD("Order.OrderPackage")->deal_account($info['accounts']);
     try{
         $result=DD('Set.UserSet')->doedit_setinfo($id,$info,$user);
         if($result){
            $this->success("编辑成功",U("Userset/index"));
         }
         $this->error("编辑失败");
     }catch(Exception $e){
        $this->error($e->getMessage());
     }
 }

 public function doedit_setinfo($id,$edit_info,$user_id)
 {
    if($id && $edit_info)
    {
         $res=M('user_set')->where(array('op_name'=>$edit_info['op_name'],'id'=>$id))->find();

         if(!$res)
         {
             E("非法数据");
         }

         $md=new Model();
         $md->startTrans();
         $user_info=DD("User.AdminUser")->get_info();
         $edit_info['start_time']=strtotime($edit_info['time1']);
         $edit_info['end_time']=strtotime($edit_info['time2']);
         foreach ($user_id as $key => $value) {

             $op=M('user_set')->where(array('op_name'=>$edit_info['op_name'],'uid'=>$value))->find();
             if($op['id']!=$id && $op )
             {
                E("此用户配置已存在");
             }

             if(M('user_set')->where('uid=%d',$value)->find())
             {
                 $edit_info['uid']=$value;
                 $result=M('user_set')->where("id=%d",$id)->save($edit_info);
                 $content="id:".$id."修改前的|op_name：".$res['op_name']."|op_value:".$res['op_value']."|op_des:".$res['op_des']."|start_time:".$res['start_time']."|end_time:".$res['end_time']."|is_del:".$res['is_del']."|uid:".$res['uid']."|修改后：op_name".$edit_info['op_name']."|op_value".$edit_info['op_value']."|op_des:".$edit_info['op_des']."|start_time:".$edit_info['start_time']."|end_time:".$edit_info['end_time']."|uid:".$value;
                 $type="修改";
                 $obj="用户配置";
                 $log_result=DD("Logs.UserOp")->handle_logs($user_info['userId'],$user_info['account'] ,$content,$type,$obj);
             }
             else
             {
                $edit_info['uid']=$value;
                $result=M('user_set')->add($edit_info);
                $content="新增用户配置|id:".$result."|op_name:".$edit_info['op_name']."|op_value:".$edit_info['op_value']."|op_des:".$edit_info['op_des']."|start_time:".$edit_info['start_time']."|end_time:".$edit_info['end_time']."|uid:".$edit_info['uid']."|is_del:".$edit_info['is_del'];
                $type="新增";
                $obj="用户配置";
                $log_result=DD("Logs.UserOp")->handle_logs($user_info['userId'],$user_info['account'] ,$content,$type,$obj);
             }
         }

         if($result!==false && $log_result )
         {
             $md->commit();
             return true;
         }
         else
         {
             $md->rollback();
             return false;
         }
    }
    else
    {
        E("参数错误");
    }
 }