docs: Add info about Router::getMatchedRouteOptions() (#9441)

* docs: Add info about `Router::getMatchedRouteOptions()`

* fix: Apply suggestions

Author: neznaika0

user_guide_src/source/incoming/routing.rst

@@ -1044,3 +1044,12 @@ This method returns a list of filters that are currently active for the route be
 .. note:: The ``getFilters()`` method returns only the filters defined for the specific route.
      It does not include global filters or those specified in the **app/Config/Filters.php** file.
 
+Getting Matched Route Options for the Current Route
+===================================================
+
+When we're defining routes, they may have optional parameters: ``filter``, ``namespace``, ``hostname``, ``subdomain``, ``offset``, ``priority``, ``as``. All of them were described earlier above.
+Additionally, if we use ``addRedirect()`` we can also expect the ``redirect`` key.
+To access the values of these parameters, we can call ``Router::getMatchedRouteOptions()``. Here is an example of the returned array:
+
+.. literalinclude:: routing/074.php
+

user_guide_src/source/incoming/routing/074.php

@@ -0,0 +1,23 @@
+<?php
+
+// Get the router instance.
+/** @var \CodeIgniter\Router\Router $router */
+$router  = service('router');
+$options = $router->getMatchedRouteOptions();
+
+echo 'Route name: ' . $options['as'];
+
+print_r($options);
+
+// Route name: api:auth
+//
+// Array
+// (
+//     [filter] => api-auth
+//     [namespace] => App\API\v1
+//     [hostname] => example.com
+//     [subdomain] => api
+//     [offset] => 1
+//     [priority] => 1
+//     [as] => api:auth
+// )