router_test.module

<?php


/**
 * @file
 * Test module.
 */
use Drupal\Core\Url;

/**
 * Implements hook_preprocess_HOOK().
 *
 * Performs an operation that calls the RouteProvider's collection method
 * during an exception page view. (which is rendered during a subrequest.)
 *
 * @see \Drupal\FunctionalTests\Routing\RouteCachingQueryAlteredTest
 */
function router_test_preprocess_page(&$variables) {
    $request = \Drupal::request();
    if ($request->getPathInfo() === '/router-test/rejects-query-strings') {
        // Create a URL from the request, e.g. for a breadcrumb or other contextual
        // information.
        Url::createFromRequest($request);
    }
}