I\'m very new to web development. I have searched for login with Google plus and found several good tutorials. But they seems to be very old (most of them from 2011). Why?>
For this you have to use google client Api library for php
and after that, you need to generate some key (like client id, client secret key, simple API key for Google)
then you have to use these API and use the keys generated. You can find the complete procedure and documents at there corresponding websites...
If you neeed the working tutorial.