PHP: Facebook / Twitter Integration

I have a CMS built in php and I'm looking to add Social Networking integration to it. I basicaly want to pre-populate the comments and contact us forms with the Facebook/Twitter information of the vi开发者_JS百科sitor if it's available.

Is there something reliable already built and tested or should I start from scratch?

Thanks.

You can integrate Facebook's Comments social plugin into your site. That would be quick and very reliable. :)

One of the solutions that's getting pretty popular is DISQUS.com, it allows users to comment when they're logged into Facebook/Twitter and many other sites. And it's starting to get wide adoption.