Editing Registration Function

Im currently trying to redirect a user to a different page if there is an error during the registration process like typing a username or an email already in use. The file im editing is a php file and i have copied the code of that file into a text file, heres the link to it

http://designstattoono1.com/foreveracesample/components/com_user/controller.txt

The coding is in here, i think editing the registration function is the answer to this but not sure where to edit.
cheers

 

You can see some code like

$mainframe->redirect( $return );


You can make use of this to redirect to the page you want based on your requirement.

$return here will be the page to which you need redirection say


If you are trying to redirect to a page error.php

code can be like this

$return = "error.php";
$mainframe->redirect( $return );

Code (markup):

Alternatively you can make use of php's redirect using header function

like

$return = "error.php";
header("Location:".$return);

PHP:

 

im i have zero knowledge on php,, so i was wondering where i can ad this piece of coding coding ??