laravel在中间件内生成参数并且传递到控制器中的2种姿势

class MidParams //中间件
{
 public function handle($request, Closure $next)
 {
  $mid_params = ['mid_params'= 'this is mid_params'];
  $request- attributes- add($mid_params);//添加参数

  return $next($request);//进行下一步(即传递给控制器)
 }
}

class MidController extends Controller { //控制器
 public function testMidFunc(Request $request) {
  $input_params = $request- input();//获取参数
  $mid_params = $request- get('mid_params');//中间件产生的参数
  return ['my_params'= $input_params,
  'mid_params'= $mid_params];
  //注意：$request- attributes- add这种方法 input()取不到值  只能用get('xxx')取到值
 }
}

class MidParams //中间件
{
 public function handle($request, Closure $next)
 {
  $mid_params = ['mid_params'= 'this is mid_params'];
  $request- merge($mid_params);//合并参数
  return $next($request);
 }
}

class MidController extends Controller { //控制器
 public function testMidFunc(Request $request) {
  $all_params = $request- input();//获取参数
  return ['all_params'= $all_params];
 }
}