Ok, is there a way for the PHP user (www-data) to gain access to other parts of the server, for example, /home/username/another_folder/ ?? Thanks in Advance.
Will<
You could change the group ownership (chgrp) of your folder to www-data (if www-data is its own group.)
You could change the user ownership of that folder (chown) and chmod it so that multiple users can access it. (Like farzad said)
You could create a group ("me_and_web") whose only members are "username" and "www-data", and chgrp -R me_and_web /home/username/another_folder