以邮箱配置为例

1. config辅助函数
提取数据config("mail.defaut")设置数据config(["mail.defaut"=>"ddddd"])
2. 数据库存储 配置信息存储在数据中 自定义实现即可

模型

    <?php    namespace App\Models;    use Illuminate\Database\Eloquent\Factories\HasFactory;    use Illuminate\Database\Eloquent\Model;    class Setting extends Model    {        use HasFactory;        protected $fillable = [            'setting_key',            'setting_type',            'setting_value',        ];    }

控制器

    <?php    namespace App\Http\Controllers\API;    use Response;    use Storage;    use Log;    use Cache;    use App\Http\Controllers\Controller;    use Illuminate\Http\Request;    use App\Models\Setting;    class EmailSettingsController extends Controller    {        private $keys = [            "MAIL_MAILER",            "MAIL_HOST",            "MAIL_PORT",            "MAIL_USERNAME",            "MAIL_PASSWORD",            "MAIL_ENCRYPTION",            "MAIL_FROM_ADDRESS",            "MAIL_FROM_NAME",        ];        public function index(Request $request){            $emailSettings = [                "MAIL_MAILER"=>config("mail.default"),                "MAIL_HOST"=>config("mail.mailers.smtp.host"),                "MAIL_PORT"=>config("mail.mailers.smtp.port"),                "MAIL_USERNAME"=>config("mail.mailers.smtp.username"),                "MAIL_PASSWORD"=>config("mail.mailers.smtp.password"),                "MAIL_ENCRYPTION"=>config("mail.mailers.smtp.encryption"),                "MAIL_FROM_ADDRESS"=>config("mail.from.address"),                "MAIL_FROM_NAME"=>config("mail.from.name")            ];            return response(["data"=>$emailSettings]);        }        public function update(Request $request){            $check = validator($request->all(),[                 'MAIL_MAILER'  =>'required',                'MAIL_HOST'  =>'required',                'MAIL_PORT'  =>'required',                'MAIL_USERNAME'  =>'required',                'MAIL_PASSWORD'  =>'required',                'MAIL_ENCRYPTION'  =>'required',                'MAIL_FROM_ADDRESS'  =>'required',                'MAIL_FROM_NAME'  =>'required',            ]);            if($check->passes()){                 Setting::whereIn("setting_key",$this->keys)->delete();                $settings = [];                foreach($this->keys as $key){                    $settings[$key] = [                        "setting_key"=>$key,                        "setting_type"=>"string",                        "setting_value"=>$request->input($key)                    ];                }                Setting::insert($settings);                return response(['message'=>"数据已保留！"]);            }else{                 return response(['check_errors'=>$check->errors()],400);            }        }        public function test(Request $request){        }    }
3. 中间件 通过中间件批改对应路由下的邮箱配置
    <?php    namespace App\Http\Middleware;    use Closure;    use Illuminate\Http\Request;    use App\Models\Setting;    class EmailSettingMiddleware    {        /**         * Handle an incoming request.         *         * @param  \Illuminate\Http\Request  $request         * @param  \Closure  $next         * @return mixed         */        public function handle(Request $request, Closure $next)        {            $keys = [                "MAIL_MAILER"=>"mail.default",                "MAIL_HOST"=>"mail.mailers.smtp.host",                "MAIL_PORT"=>"mail.mailers.smtp.port",                "MAIL_USERNAME"=>"mail.mailers.smtp.username",                "MAIL_PASSWORD"=>"mail.mailers.smtp.password",                "MAIL_ENCRYPTION"=>"mail.mailers.smtp.encryption",                "MAIL_FROM_ADDRESS"=>"mail.from.address",                "MAIL_FROM_NAME"=>"mail.from.name",            ];            $settings = Setting::whereIn("setting_key",collect($keys)->keys()->toArray())->get();            foreach ($settings as $item) {                config([$keys[$item->setting_key]=>$item->setting_value]);            }            return $next($request);        }    }