I am trying to build an application where user will enter some email id and we will provide him facebook info of the account associated with that email.I have tried it using php sdk but it said that user access token was required. We don't want to let user login for performing search.If anybody can help me please give your appreciated time.I have also gone through the post :
[Find Facebook user (url to profile page) by known email address
but no luck with that too.