## URL ``` URL::full(); URL::current(); URL::previous(); URL::to('foo/bar', $parameters, $secure); URL::action('NewsController@item', ['id'=>123]); // 需要在适当的命名空间内 URL::action('Auth\AuthController@logout'); URL::action('FooController@method', $parameters, $absolute); URL::route('foo', $parameters, $absolute); URL::secure('foo/bar', $parameters); URL::asset('css/foo.css', $secure); URL::secureAsset('css/foo.css'); URL::isValidUrl('http://example.com'); URL::getRequest(); URL::setRequest($request); // 签名路由 URL::signedRoute('route name', $parameters, $expiration, $absolute); URL::temporarySignedRoute('route name', now()->addHour(), $parameters, $absolute); ```