dodgepudding/wechat-php-sdk — pull request #119 by kmfish (2014-08-22 15:48:27+00:00)
Title: fix error at no "EventKey" field in the post xml message which received ...

...from wechat;

在调试的时候发现，微信的关注/取消事件的消息体，是不含“EventKey” 字段的。所以在调用getRevEvent() 时报错了。所以作了修改。