Information about visitors to VK?

Question

PHP

There is a site soctracker.ru , which gives the code -> paste it on the site and monitor who comes to us (VK data).
I tried to do about the same thing, danil-html.ru/vk-info
Tell me how best to implement it ?!

Answer 1

habrahabr.ru/post/228617
Only now this trick will not work and needs to be rewritten using the likes widget.

Answer 2

VKontakte allows you to use it without an authorization widget on the site: an example

Answer 3

these guys ru.soctracker.com also catch facebook accounts :)

Answer 4

If you need without damn clickjacking and for free, then only https://socgram.ru