Create a php page to detect if a user is logged into Facebook or not -

i need know if possible, , ideally links tutorials/code etc. ideal!

so have page called "detect.php". user visits page , if logged facebook taken 1 url, if aren't go another

so needs work if don't have facebook open in same browser, guess cookie related?

i have spoken programmer it, , saying not possible unless first create app , allow facebook permissions user. doesn't make sense me

if there no official facebook way, perhaps workaround or other ideas?

thanks alot

the programmer right, need create facebook app in order detect if user logged in facebook, creating facebook app easy , code user status should this: fb.getloginstatus(function(response) { if (response.status === 'connected') { // user logged in , has authenticated // app, , response.authresponse supplies // user's id, valid access token, signed // request, , time access token // , signed request each expire //redirect here var uid = response.authresponse.userid; var accesstoken = response.authresponse.accesstoken; } else if (response.status === 'not_authorized') { // user logged in facebook, // has not authenticated app //redirect here } else { // user isn't logged in facebook. } });detect if facebook user logged in no popups