PHP：laravel日期序列化自定义默认日期格式

<?php
namespace App\Traits;
use DateTimeInterface;
trait SerializeDate
{
    /**
     * 为 array / JSON 序列化准备日期格式
     *
     * @param  \DateTimeInterface  $date
     * @return string
     */
    protected function serializeDate(DateTimeInterface $date)
    {
        return $date->format('Y-m-d H:i:s');
    }
}

<?php
namespace App\Models;
use App\Traits\SerializeDate;
use Illuminate\Database\Eloquent\Model;
/**
 * App\Models\BaseModel
 * @mixin \Illuminate\Database\Eloquent\Model
 */
class BaseModel extends Model
{
    use SerializeDate;
}