Question

I have created a business page on facebook and added application to a tab.

I want to retrieve the uid of the users who visit the tab. I am using $_POST['fb_sig_profile_user']

But it give the page id not the uid.

Please help me on this.

Thanks

Pankaj

Answer 1

You cannot get the UID of the user viewing the tab unless they interact with it first:

Application tabs behave like a hybrid of a canvas page and a profile box. A tab has the following properties:

• It fetches data from its application servers.
• It can load AJAX.
• It doesn’t know who the viewing user is when the user first visits the tab. Facebook sends the fb_sig_user and fb_sig_profile_user parameters, both containing the profile owner’s user ID.
• If a viewing user interacts with the tab (like submits a form, takes an action that causes an AJAX load of new content, or follows a relative URL that loads on the tab), that user’s UID is sent to the application as the fb_sig_user parameter, the profile owner’s user ID is sent as the fb_sig_profile_user parameter. The viewing user’s session key is key is sent only if the user authorized the application.

(from http://wiki.developers.facebook.com/index.php/Tabbed_Profile#Application%20Tab%20Behavior%20and%20Policies)