symfony1 breadcrumbs builder based on filter

breadcrumbsFilter.class.php

<?php
 
class breadcrumbsFilter extends sfFilter
{
 
  public function execute($filterChain)
  {
    if ($this->isFirstCall()) {
      $module = $this->context->getRequest()->getParameter("module");
      $action = $this->context->getRequest()->getParameter("action");
      $route = $this->context->getRouting()->getCurrentRouteName();
 
      $crumbs = [
        "by-route" => [
          "homepage" => function($that) use ($module, $action, $route) {
            return [
              "test/index" => "Отображение",
              "test/index?id=2" => "Отображение 2",
            ];
          }
        ],
 
        "by-module" => [
          "main" => function($that) use ($module, $action, $route) {
            return [
              "test/index" => "Отображение",
              "test/index?id=2" => "Отображение 2",
            ];
          }
        ],
 
        "by-action" => [
          "index" => function($that) use ($module, $action, $route) {
            return [
              "test/index" => "Отображение",
              "test/index?id=2" => "Отображение 2",
            ];
          }
        ],
      ];
 
      function array_search_key($needle, array &$haystack) {
        return isset($haystack[$needle]) && is_callable($haystack[$needle]) ? $haystack[$needle] : false;
      }
 
      $generator =
        array_search_key($route, $crumbs["by-route"])
        ?: array_search_key($module, $crumbs["by-module"])
        ?: array_search_key($action, $crumbs["by-action"])
        ?: function($that) {
          return [
            "@homepage" => "Главная страница",
          ];
        }
      ;
 
      $breadcrumbs = call_user_func($generator, $this);
      $this->context->getUser()->setFlash("breadcrumbs", $breadcrumbs);
    }
 
    $filterChain->execute();
  }
}

layout.php

<div class="row">
  <div class="main container">
    <ol class="breadcrumb">
    <?php
      $crumbs = $sf_user->getFlash("breadcrumbs")->getRawValue();
      $last = array_splice($crumbs, -1);
      foreach ($crumbs as $route => $name): ?>
      <li><a href="<?php echo url_for($route); ?>"><?php echo $name; ?></a></li>
    <?php endforeach ?>
      <li class="active"><?php echo array_pop($last); ?></li>
    </ol>
  </div>
</div>