piwik 图片追踪，加自定义变量的url 参数介绍

<!-- Piwik Image Tracker-->
<img src='http://piwik.tomtop.com/piwik.php?_cvar={"1":["OS","iphone 5.0"],"2":["Piwik Mobile Version","1.6.2"],"3":["Locale","en::en"],"4":["Num Accounts","2"]}

&action_name=View settings&url=http://mobileapp.piwik.org/window/settings &idsite=3&rand=351459​&h=18&m=13&s=3​ &rec=1&apiv=1​&cookie=​ &urlref=http://iphone.mobileapp.piwik.org​

&_id=af344a398df83874​ &_idvc=19​&res=320×480&' style="border:0" alt="" />
<!-- End Piwik -->

其中

_cvar 是自定义参数名字

url，相当于在网站中访问的当前页面

idsite 是当前网站在piwik中的id

rec 必须有

cookie 是cookie

urlhref是url来源