KnpMenu类库可以为PHP 5.3提供面向对象的菜。
在Symfony2中，最初用于 KnpMenuBundle 不过现在可以单独使用了

<?php

use Knp\Menu\MenuFactory;
use Knp\Menu\Renderer\ListRenderer;

$factory = new MenuFactory();
$menu = $factory->createItem('My menu');
$menu->addChild('Home', array('uri' => '/'));
$menu->addChild('Comments', array('uri' => '#comments'));
$menu->addChild('Symfony2', array('uri' => 'http://symfony-reloaded.org/'));
$menu->addChild('Coming soon');

$renderer = new ListRenderer();
echo $renderer->render($menu);

上面的代码将会生成如下的 HTML:

<ul>
  <li class="first">
    <a href="/">Home</a>
  </li>
  <li class="current">
    <a href="#comments">Comments</a>
  </li>
  <li>
    <a href="http://symfony-reloaded.org/">Symfony2</a>
  </li>
  <li class="last">
    <span>Coming soon</span>
  </li>
</ul>

通过这样的方式，你终于不必为了显示“第一项”，“最后一项”，“子菜单”而编写一个丑陋的模版了

The bulk of the documentation can be found in the doc directory.

KnpMenu 不提供自动加载器 but follow the PSR-0 convention. 你可以对这个类库使用任何兼容的加载器, for instance the Symfony2 ClassLoader component. 假设你签出的类库在 vendor/KnpMenu下面, 它应该这样配置:

<?php
$loader->registerNamespaces(array(
    'Knp\Menu' => __DIR__.'/vendor/KnpMenu/src'
    // ...
));

Follow the tutorial in doc/01-Basics-Menus.markdown and doc/02-Twig-Integration.markdown to discover how KnpMenu will rock your world!

This bundle was originally ported from ioMenuPlugin, a menu plugin for symfony1. It has since been developed by KnpLabs and the Symfony community.