gistfile1.php

<?php

$router = new Phalcon\Mvc\Router(false);

$router->add(
        "/([a-z]{2})/([0-9]{1,})/:action/:params",
        array(
            "controller" => 'servers',
            "domain"     => 1,
            "server"     => 2,
            "action"     => 3,
            "params" => 4
        )
);

$router->add(
        "/([a-z]{2})/([0-9]{1,})/:action",
        array(
            "controller" => 'servers',
            "domain"     => 1,
            "server"     => 2,
            "action"     => 3
        )
);

$router->handle("/br/20/search");

var_dump($router->getParams());
var_dump($router->getControllerName());
var_dump($router->getActionName());

/**

array(2) {
  'domain' =>
  string(2) "br"
  'server' =>
  string(2) "20"
}
string(7) "servers"
string(6) "search"

*/

$router->handle("/br/20/search/aa");

var_dump($router->getParams());
var_dump($router->getControllerName());
var_dump($router->getActionName());

/**

array(3) {
  [0] =>
  string(2) "aa"
  'domain' =>
  string(2) "br"
  'server' =>
  string(2) "20"
}
string(7) "servers"
string(6) "search"

*/