什么是pgv_si和pgv_pvi

I'm using PHPV7, I found there is pgv_si and pgv_pvi. I can't find them from PHP.net official website. Anyone knows what is that?

The code is below:

var_dump('cookie', $_COOKIE);

I understand it is generated by cookie, but I don't know what is that for...

Those are just some variables in cookies, set by server. Please read some documentation on cookies, that does not have any connection to PHP itself.

They are set for the Tencent QQ login service authentication.

There are four vars related with that: pgv_pvi,pgv_si,pgv_pvid, pgv_info=ssid=xxx

You can read more at blog posts below: https://blog.csdn.net/frykool/article/details/11833335 http://www.cnblogs.com/shawnye/p/6376400.html