parking_manage_system/app/Models/ParkingWhitelist.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class ParkingWhitelist extends Model
{
    use HasFactory, SoftDeletes;

    protected $table = 'parking_whitelist';

    protected $fillable
        = [
            'license_plate_id',
            'parking_id',
            'member_type',
            'admin_user_id',
            'channel_ids',
            'reason',
            'status'
        ];

    protected $hidden
        = [
            'updated_at',
            'deleted_at'
        ];

    public function getChannelIdsAttribute($value): array
    {
        return $value ? explode(',', $value) : [];
    }

    public function getCreatedAtAttribute($value): string
    {
        return $value ? date('Y-m-d H:i:s', strtotime($value)) : '';
    }
}