Codeigniter with wordpress

[eluser]jamesduncan[/eluser]
Ive been able to Google this post about doing it


http://www.indevcenter.com/2012/06/23/ac.../#more-201


My question would be - do I drop the code suggested in the post into one of my WP theme PHP files? (basically like a CI view file)

Ive tried doing that and printing and echoing and getting no results

print_r($data);

or
print_r($_SESSION);

Cheers