Did I understand the Apache2 license correctly?

Question

Apache HTTP Server

Yes, I read it.
There are a couple of questions left.
There is a source code under the Apache license, I modified them and also in OpenSource.
Correctly and whether it will be enough:
1. Add the file LICENSE.
2. Add a NOTICE file in which you will need to write the names of the files distributed initially under Apache2

Answer 1

Feel free to take a look at my question What restrictions does the Apache License, Version 2.0 impose on a font when printing?
It's not the answer to your question, it's the question. It's just that maybe you understand better than me how to work with a license in relation to fonts.
Well, look at the links, in relation to software, everything seems to be simple.

Answer 2

$s = preg_split('/\W+/u', $s, -1, PREG_SPLIT_NO_EMPTY);

Answer 3

How to split a string by multiple principles in explode?