Question

I am building a web-app where I need to access list of spreadsheets from Google Docs (of Google Apps)

I want to authenticate using OAuth.

How can I do it in my PHP application?

One important thing, I want to authenticated on my user behalf. My application will run in background, and user will get email regarding list of spreadsheets associated with his/her account. I don’t want a script that will need user to enter his/her email-id and password everytime script runs.

Answer 1

First, here is an overview of OAuth usage with Google:
http://www.google.com/support/a/bin/answer.py?answer=61017

Next, here is a more in-depth overview of OAuth usage with Google: http://code.google.com/apis/accounts/docs/GettingStarted.html

Next, here is a sample of how to do 2 legged OAuth with PHP:
http://gdatatips.blogspot.com/2008/11/2-legged-oauth-in-php.html

Finally, here is the Google Documents List API (that you will most likely need to use):
http://code.google.com/apis/documents/

Enjoy! (And remember to vote up if you liked this answer)