Authorization via google plus in PHP?

Question

PHP

How can I authorize on the site through PHP by connecting the google API?
The website has a feedback form.
Purpose of authorization: To make sure that reviews are not repeated (that is, from each google account 1 review).
How can you do it?

Answer 1

give a piece of code and errors

Answer 2

I recommend using the SocialConnect library:
https://github.com/socialconnect/auth
On GitHub there is an example of how to do this for GitHub, by analogy it is possible for Google Plus.