Facebook PHP SDK Extracting Access Token -

every time run script gives me different access token. thought access token unique user.. why script unreliable, fails half time.

my facebook access token page

here code:

<?php require 'lib/facebook.php'; require_once('c:\inetpub\storeboard.com\linkedin\extract_data.php');  $facebook = new facebook(array(   'appid'  => facebook_appid,   'secret' => facebook_app_secret ));  $user = $facebook->getuser();  if ($user) {   try {     // proceed knowing have logged in user who's authenticated.     $user_profile = $facebook->api('/me');   } catch (facebookapiexception $e) {     echo '<pre>'.htmlspecialchars(print_r($e, true)).'</pre>';     $user = null;   } }  $access_token = $facebook->getaccesstoken(); if (isset($access_token)) {    echo $access_token;     //header( 'location: http://www.'.app_root_domain.'/facebook/save_token.asp?ntoken='.$access_token); }  ?> 

have cut out code required original: http://developers.facebook.com/blog/post/534/ or missing something.

require_once('c:\inetpub\storeboard.com\linkedin\extract_data.php'); 

this line of code extracts appid , appsecret database.

i complete beginner when comes php, appreciated.

many thanks!

you don't need play token simple authentication:

after facebook api instance:

$facebook = new facebook(array(   'appid'  => facebook_appid,   'secret' => facebook_app_secret )); 

if using me api - user profile:

$user_profile = $facebook->api('/me'); 

then obtain email it:

$email = $user_profile['email']; 

at point check if email valid in database - if yes start user session , go.