Gmail Login from my site

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PHP

OAuth

OAuth2

Hello,

I'm trying gmail login on my website. i used Oauth2 for this.
http://www.idiotminds.com/sign-in-with-google-account-using-oauth2-0/

Here process is working fine but i don't getting any data from the service like username , email etc. no any data is returning for me

http://22yardscricket.com/gmaillogin/index.php

kindly suggest.

Regards,
Harish