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Possible Duplicate:
Detect Facebook page fan on the website
I have a question to do, can there be a way for a drupal website to recognize if the visitor likes or not a facebook page, without authentication, just by a simple visit?
Thanks..
It’s already answered as comments but here is why.
If the user hasn’t authenticated with a facebook app you coded, you can not access user information using a server-side script. You can however imaging to use an iframe’d like button and to use Javascript to check the iframe content. It doesn’t work either.
Javascripts has a policy that is doesn’t work through DOMs over different domains.
See http://www.dyn-web.com/tutorials/iframes/refs.php#access
I see another question here which is already closed and I’m not wondering if this happens to this question as well.