How to Process Params of a Route Callback Function?

Another option might be simpler, though. You should be able to do something like this:

PHP Code:

$route['controller/specific_method/(:any)'] = 'controller/specific_method/$1';
$route['controller/(:any)/(:any)'] = 'controller/index/$1/$2';
$route['controller/(:any)'] = 'controller/index/$1'; 


As long as the 'controller/specific_method' route is defined first, it should be resolved before the 'controller/(:any)' routes.

Thank you for the answer! I had to go with the simpler option as the callback function just refused to work as expected even if the 2nd param had a default empty value.