Expend access token for fan pages

Question

i searched for 2 days about my problem find a lot of solution but none worked for me. I want to make a facebook application that i will access from cronjob once for 20 minutes. This app shoult post to my page a photo with description in a album. The problem is the token access that expires ... so the code ...

//connect to api
$facebook = new Facebook(array(
          'appId'  => APP_ID,
          'secret' => APP_SECRET
        ));

//get the page token
$page_id = 222506244512259;
$page_info = $facebook->api("/$page_id?fields=access_token");

$page_info['access_token']; //so if i use this token is ok but it expires in 2 hours

//now we try to use something else to extend the time

$token_url="https://graph.facebook.com/oauth/access_token?client_id=".APP_ID."&client_secret=".APP_SECRET."&grant_type=fb_exchange_token&fb_exchange_token=".$facebook->getAccessToken();

//so if i use this formula i will receive a token that never expires, is ok but if I try to use the acces token for posting it doesn work is not valid

$response = file_get_contents($token_url);
$params = null;
parse_str($response, $params);
$page_info['access_token'] = $params['access_token'];


//and this is the rest code for posting

$image['file'] = 'images/rezultate/'.$link;
$args = array( 'access_token' => $page_info['access_token'], 'message' => ':-) <3', 'no_story' => 0);
$args['image'] = '@' . $image['file'];
$target_url = "https://graph.facebook.com/356048711158011/photos";

$ch = curl_init(); 
curl_setopt ($ch,CURLOPT_URL,$target_url); 
curl_setopt ($ch, CURLOPT_POST, 1); 
curl_setopt ($ch, CURLOPT_RETURNTRANSFER,1); 
curl_setopt($ch, CURLOPT_POSTFIELDS, $args);
curl_exec($ch); 
curl_close ($ch);

I updated the code but still not working, maybe you some something wrong...

define('TITLU', 'Postare automată'); //titlu aplicatie
define('APP_ID',123096994520827); //id aplicatie
define('APP_SECRET', '25dedb6a969e9bd934e1ea9f16944a83'); //secret aplicatie
define('TABEL', 'postareautomata'); //numar random maxim


//start facebook
$facebook = new Facebook(array(
      'appId'  => APP_ID,
      'secret' => APP_SECRET
));

//get page id and 2 hour page token
$page_id = 222506244512259;
$page_info = $facebook->api("/$page_id?fields=access_token");
//access token 2 hours
$page_info['access_token'];

//here i get my account but for nothing
$acc = $facebook->api("/100001036884257/accounts");
//echo var_export($acc, true);


//here i get the long token it returns a code value but when i used down don`t work
$longtoken = 'https://graph.facebook.com/oauth/access_token?client_id='.APP_ID.'&client_secret='.APP_SECRET.'&grant_type=fb_exchange_token&fb_exchange_token='.$facebook->getAccessToken();     
$response = file_get_contents($longtoken);
$params = null;
parse_str($response, $params);
$longtoken = $params['access_token'];

echo"Acces Token short: ".$page_info['access_token'];
echo"<br />Acces Token long: ".$longtoken;

//here i get my folder picture and pictures
$a = file_get_contents('http://www.ingersidemon.ro/proiecte/pitzi-world.ro/.facebook/postareautomata/images/rezultate/');
$dom = new DOMDocument;
$dom->loadHTML($a);
$nodes = $dom->getElementsByTagName('a');
$nrpoze = $dom->getElementsByTagName('a')->length - 1;
$picid = get_last_picture();
$link = $nodes->item($picid['id'] + 1)->getAttribute('href');
//echo "Link poza: ".$link;



if($picid['id'] + 1 <= $nrpoze) {
    $data = array(
        'link' => $link,
        'desc' => ':-) <3'
    );
    insert_picture($data);
//and here is the bog problem if i use short acces token it works for 2 hours but the long never work
    $params = array('access_token' => '$longtoken', 'message' => ':-) <3');
    $params['source'] = '@' . realpath('images/rezultate/'.$link);
    $facebook->setFileUploadSupport(true);
    $post_id = $facebook->api('/'.$page_id.'/photos','post',$params);

}

Update 3: The app is working good but only if i acces it, not from cronjob, and the acces token is for 2 months, in cronjob gives

PHP Fatal error: Uncaught OAuthException: A user access token is required to request this resource.

define('TITLU', 'Postare automată'); //titlu aplicatie
define('APP_ID',123096994520827); //id aplicatie
define('APP_SECRET', '25dedb6a969e9bd934e1ea9f16944a83'); //secret aplicatie
define('TABEL', 'postareautomata'); //numar random maxim

$facebook = new Facebook(array(
      'appId'  => APP_ID,
      'secret' => APP_SECRET
));


// Get User
$user = $facebook->getUser();


// ask for the extended token and get it from session ...
$facebook->setExtendedAccessToken();
$access_token = $_SESSION["fb_".APP_ID."_access_token"];
// now set it into the facebook object ....
$facebook->setAccessToken($access_token);
// now our fb object will use the new token as usual ...
$accessToken = $facebook->getAccessToken();
echo $access_token;

$params = array(
                'access_token' => 'AAABv9MChnvsBAALtC4XoywkLdGQMzmJHYbN8G2RjgZCGlzR6DnkB8X12FZCE6XIZB81KkYevIYzC2pu5UvVZBoOFvw8j0cgjLeHcwvcOpwZDZD',
                'message'=> "cron"
        );
    $post_id = $facebook->api('/'.$page_id.'/feed','post',$params);

Answer 1

Use a App Token found in Access Token Tool.

Answer 2

The normal access token expires in 2 hours, and the extended token lasts for 2 months.

If you want the extended token, go though this: How to extend access token validity since offline_access deprecation

(You can use Facebook's Debug Tool to check the validity of your access token.)

Answer 3

See my answer to a similar question here

From the developers page:

By using a long-lived user access token, querying the [User ID]/accounts endpoint will now provide page access tokens that do not expire for pages that a user manages.

Answer 4

Page tokens only last as long as the user access token used to acquire them. You can't have an infinitely lasting token. You need to be able to periodically renew your token and deal with tokens that unexpectedly expire. There is some more information in a FB blog post from last year.