Concatenate self::property?

Question

PHP

Hello!
Is it possible and if so, how to properly concatenate self::property into curly braces of double quotes, otherwise it turns out to be an ugly snake.
Presently

$file_view = APP . '/views/' . self::$route['controller'] . '/' . self::$route['action'] . '.php';

Expected (but clear stump - syntax error)

$file_view = APP . "/views/{self::$route['controller']}/{self::$route['action']}.php";

I would like something, as in the expected variant.
Thank you.

Answer 1

will fail
.
is determined. Using single curly braces ({}) will not work to access the values ​​of functions, methods, class constants, or static class variables