auto login to other sites php script

Question

I want a script by which i can login to other website without opening their login page.

The scenario is like this. I do not want to give login id and password to others.

Answer 1

I would never trust any site that requires me to enter my username and password for another site. How do I know you are not going to hack my account? Instead use OpenID. This way your users need to log in to the other site and give your site temporary access using a token. All of the major social networking sites support OpenID or similar.