Newbie question - global variable in codeigniter

[eluser]Senthilguru[/eluser]
Global variable Declaration..
declare it in config file : location.... system/application/config/config.php

Code:

$config['site_name'] =   'XXXXXXXXXXXXXXXXXXXX';

get anywhere like this....

Code:

$this->config->item('site_name');

Cheers,
Senthilguru.E
www.cogzidel.in