Optional parameter for controller

[eluser]pickupman[/eluser]
In the actual function/method. Placing code in the constructor would be for things used throughout the entire controller.

Code:

function back(){
  $offset = $this->uri->segment(5,10);
}

I always put these at the top of the function/method. You can also pass uri segment default values by placing them in the arguments for the function

Code:

function at($third_segment = 'orders', $forth_segment = 'start', $fifth_segment = '10'){
  //Now each segment has a default value
}

The arguments need to be passed together in succession. (ie. you can just pass the 4th item, and not declare the ones before it.