Routing

The first stage of routing happens in Apache. Elgg uses rewrite rules to map a request to one of the primary handlers. The primary handler dispatches the request to the registered secondary handler.

As an example, the relative URL /action/comments/add/ is routed to the action handler registered for the "comments/add" action. The relative URL /friends/johndoe/ is routed to the page handler registered for the friends identifier.

Code location

Apache rewrite rules: /.htaccess

Primary handlers: /engine/handlers/

Library functions: /engine/lib/actions.php, /engine/lib/pagehandler.php