How to get the path of a derived class from an inherited method?

Question

How to get the path of the current class, from an inherited method?

I have the following:

Answer 1

Don't forget, since 5.5 you can use class keyword for the class name resolution, which would be a lot faster than calling get_class($this). The accepted solution would look like this:

protected function getDir() {
    return dirname((new ReflectionClass(static::class))->getFileName());
}