How to define a global variable(value) in codeIgniter

Question

I simply do not mean how to define a global variable/constant in CodeIgniter. Let me explain: I have made a theme engine which is select-able from the current logged in user\'s

Answer 1

I got this from the manual and this what I have at the top of my config/config.php file: (i have a custom config set to paypal testing)

// HOW TO USE - For example if there's $config['foo'] = 'bar';
// in the config 
// using $this- >config->item('foo') will be 'bar'.

// example for my paypal testing: 
$config['paypaltest']=0;  

http://ellislab.com/codeigniter%20/user-guide/libraries/config.html

and how to access in a controller:

$paypaltest = $this->config->item('paypaltest');