title: Integrating Google OAuth Authorization in my web-app
body: <p>I am building a web-app where I need to access list of spreadsheets from Google Docs (of Google Apps)</p>
  
  <p>I want to authenticate using OAuth.</p>
  
  <p>How can I do it in my PHP application?</p>
  
  <p>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.</p>