Piwik是一套基于Php+MySQL技术构建的开源网站访问统计系统，前身是 phpMyVisites。Piwik可以给你详细的统计信息，比如网页 浏览人数, 访问最多的页面, 搜索引擎关键词等等，并且采用了大量的AJAX/Flash技术，使得在操作上更加便易。此外，它还采用了插件扩展及开放API架构，可以让开发人员根据 自已的实际需求创建更多的功能．
改进内容：
Bug fixes
- #1008 - open_basedir() restrictions would cause is_writable() to fail with a notice; this was used in determining whether the session.save_path was writable when session.save_handler = files
- #1009 - one-click update might fail with PIWK_USER_PATH not defined
- Some non-Apache users reporting Piwik displays only a blank page after the update.
Maintenance
- sendHttpRequest() by sockets: increase buffer size and fflush() output.