最值得推荐的开源 PHP CMS 系统有哪些？
尽量小的 、功能模块要求不多。适合企业网站就可以啦 但代码要规范 严谨 注解详细 二次开发方便的
回复内容：
wordpress、drupal、joomla、xoops之类的老牌开源CMS，代码的严谨性、可二次开发性完全不用担心。wordpress像简单装修的房子，各类家具很方便查找和购买，但如果发现比如水管没牵好之类的“硬装修”问题会比较头痛；joomla像豪华装修的房子；drupal像乐高；xoops没项目经验，没发言权。
仅仅是企业的介绍和一些企业动态的发布的话，wordpress可以完胜，开发简易、资源多（插件、主题、主题框架……）、文档丰富，但如果可能会经常性地增加某些潜在需求，用drupal会保险点，但投入、门槛更高些。 推荐wordpress，完善，强大。 说Wordpress只适合做个人博客的,是完全不会Wordrpess的.
我用Wordpress都是当框架用的.
此外,Drupal也是一个不借的选择. Drupal 白宫的网站就是基于这个做的
Wordpress 万能的WP现在也可以做CMS
joomla phpcms dedecms等也不错 必须是 OURPHP 国内开源的.功能也强大 anwsion,基于php开发的社交问答项目，目前已经发布测试版。类似vbb的模版继承方式，支持ucenter用户接口，提供quora和stackoverflow类的模版，支持自定义定制 嗯，的确不少啊
http://cmscase.com
可以到这里看看，cms的介绍很多 小的企业站点可以使用wordpress，二次开发比较简单。
复杂一点的话，Joomla是个不错的选择，但是上手有些难度。 企业建站的话用国外的就可以比如：joomla 。但是这个二次开发的入门教难，但是自身的功能强大的很。dede，phpcms适合一般的新闻网站。 国外的推荐drupal,国内的推荐Ecms,功能都很强大，适合二次开发。
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