How to call a config item

[eluser]InsiteFX[/eluser]
It depends on where you are calling it from, if you are trying to call it from a library or helper then you need to use the CodeIgniter super object.

Code:

class Some_lib {

/**
  * The CI super object
  */
private $CI;

public function __construct()
{
  $this->CI = get_instance();
}
}

// then to access a config item you would do it like this
$var  = $this->CI->config->item('encryption_key');