public function store(Request $request)
{
 //TODO
}

Route::resource('/role', 'Admin\RoleController');

public function dispatch(Route $route, $controller, $method)
{
 $parameters = $this->resolveClassMethodDependencies(
  $route->parametersWithoutNulls(), $controller, $method
 );
 
 if (method_exists($controller, 'callAction')) {
  return $controller->callAction($method, $parameters);
 }
 
 return $controller->{$method}(...array_values($parameters));
}

protected function resolveClassMethodDependencies(array $parameters, $instance, $method)
{
 if (! method_exists($instance, $method)) {
  return $parameters;
 }
 
 return $this->resolveMethodDependencies(
  $parameters, new ReflectionMethod($instance, $method)
 );
}

protected function transformDependency(ReflectionParameter $parameter, $parameters)
{
 $class = $parameter->getClass(); 
 // If the parameter has a type-hinted class, we will check to see if it is already in
 // the list of parameters. If it is we will just skip it as it is probably a model
 // binding and we do not want to mess with those; otherwise, we resolve it here.
 if ($class && ! $this->alreadyInParameters($class->name, $parameters)) {
  return $parameter->isDefaultValueAvailable()
   "color: #ff0000">3.关于 PHP 反射

举个使用 ReflectionMethod 的例子。


class Demo
{
 private $request;
 public function store(Request $request)
 {
 }
}


打印出 new ReflectionMethod(Demo::class, ‘store') 的内容如图：

可以得出这个方法的参数列表，参数的约束类型，如 typeHint，Illuminate\Http\Request.
根据类名可以从容器中获取一开始通过服务提供者绑定的实例。
总结
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