Simply not true and irrelevant. In fact, their site explicitly states that having the domain “eu.org” does not mean any relationship to the EU governing body.
Your friend: include_once('another_file');
Just create a file to have my code and then call it using the above line.
.htaccess file is not for the purpose that you desire, and if that’s the case, nobody here would honor any file size limits if you’re aware.