I am installing an application inside of a Facebook page. I received the signed\_request variable in my $\_REQUEST, or when using the Facebook PHP SDK Facebook::getSignedRequest() function. However, inside my application when I go to a different page within the application, the signed\_request does not follow it. 

I understand that it is placed inside the $\_SESSION and the signed\_request data is stored inside the session, but what method am I supposed to be calling in order to get that data? Do I have to strip it out of my session myself and not use the PHP SDK? I would expect getSignedRequest to always give me the same result as long as I am receiving it in the $\_REQUEST or through the $\_SESSION.

Please advise! Thanks in advance!