尝试使用 pluck 获取 created_at 日期。
$campaigns_dates = CampaignHistory::where('status', "Complete")->orderBy( 'created_at', 'ASC' )->pluck('created_at');
$campaigns_dates = json_decode( $campaigns_dates );
return $campaigns_dates;
//得到这个
["2020-06-29T14:19:03.000000Z","2020-06-29T14:19:42.000000Z","2020-07-29T14:23:54.000000Z","2020-08-28T14:55:53.000000Z","2020-08-29T14:17:40.000000Z","2020-09-29T14:18:27.000000Z","2020-09-29T14:21:13.000000Z"]
//但是想要这个
Example: ["2020-06-29 14:19:03","2020-06-29 14:19:42"]