Redirect User To New Page From Registration Page

Hi,

Im trying to redirect a user to a new page when they get an error in the registration page (like when they type a username or email address that is already in use in the signup form). Already in my site when a user registers they get redirected to a new page. I did this by editing the controller.php file. Im wondering how to redirect a user to a new page when they get an error in the registraion page ? it has to be from the controller.php file i guess. But not sure where to edit ?

thanks

 

well i know that i have to edit the registration function to redirect the user to a different page if there is an error during registration like typing a username or an email already in use. Heres the function im trying edit, but still im not sure what exactly i should edit

function register_save()
{
global $mainframe;

// Check for request forgeries
JRequest::checkToken() or jexit( 'Invalid Token' );

// Get required system objects
$user = clone(JFactory::getUser());
$pathway =& $mainframe->getPathway();
$config =& JFactory::getConfig();
$authorize =& JFactory::getACL();
$document =& JFactory::getDocument();

// If user registration is not allowed, show 403 not authorized.
$usersConfig = &JComponentHelper::getParams( 'com_users' );
if ($usersConfig->get('allowUserRegistration') == '0') {
JError::raiseError( 403, JText::_( 'Access Forbidden' ));
return;
}

// Initialize new usertype setting
$newUsertype = $usersConfig->get( 'new_usertype' );
if (!$newUsertype) {
$newUsertype = 'Registered';
}

// Bind the post array to the user object
if (!$user->bind( JRequest::get('post'), 'usertype' )) {
JError::raiseError( 500, $user->getError());
}

// Set some initial user values
$user->set('id', 0);
$user->set('usertype', '');
$user->set('gid', $authorize->get_group_id( '', $newUsertype, 'ARO' ));

$date =& JFactory::getDate();
$user->set('registerDate', $date->toMySQL());

// If user activation is turned on, we need to set the activation information
$useractivation = $usersConfig->get( 'useractivation' );
if ($useractivation == '1')
{
jimport('joomla.user.helper');
$user->set('activation', JUtility::getHash( JUserHelper::genRandomPassword()) );
$user->set('block', '1');
}

// If there was an error with registration, set the message and display form
if ( !$user->save() )
{
JError::raiseWarning('', JText::_( $user->getError()));
$this->register();
return false;
}

// Send registration confirmation mail
$password = JRequest::getString('password', '', 'post', JREQUEST_ALLOWRAW);
$password = preg_replace('/[\x00-\x1F\x7F]/', '', $password); //Disallow control chars in the email
UserController::_sendMail($user, $password);

// Everything went fine, set relevant message depending upon user activation state and display message
if ( $useractivation == 1 ) {
$message = JText::_( 'REG_COMPLETE_ACTIVATE' );
} else {
$message = JText::_( 'REG_COMPLETE' );
}

$this->setRedirect('index.php', $message);
}