Understanding How Controller Works!

index.php is main router file

When parameters are passed to this file , It gets Controller and Function for it.

For example

index.php?ctl=user&act=register

here controller is User and action(function) is register
Now to edit this function register under controller

You would need to goto following location

app/Lib/modules/userModule.class.php

You can find register function in it

In each function there is defined a template

In register function there is code for it

$GLOBALS[‘tmpl’]->display(“user_register.html”,$cache_id);

So it is using template file

/app/Tpl/cv4/user_register.html

Another quick way to find template file for any Url

Notice URL when SEF if off

Example

When URL is index.php?ctl=settings&act=security

General syntax for template is ctl_act.html

thus settings_security.html should be the file you need to edit.