閉包查詢
tbmember表閉包查詢查詢 openid=‘abc并且islose=0并且islogout=0并且(wx_unionid=null或者wx_unionid=’')
Db::table('tbmember')->where(['openid'=>'abc','islose'=>0,'islogout'=>0])->where(function ($query){$query->where('wx_unionid',null)->whereOr('wx_unionid','');})->select();