I wanna give all my website authors a possiblity to post their articles on our facebook page without having go give them admin access to it.

So i created a simple form, where the author types in: URL, URL to image, message

On submit, this form will send a ajax request to facebook.php where the magic "should" happen.

The first problem occurs at "require_once". It's not possible to require all 4 files without having an error. If i get rid of the facebook exception, then everything works except the request itself. There seems to be an PHP Error, because i get no ajax response at all.

session_start();

require_once($_SERVER['DOCUMENT_ROOT'].'/sys/facebook/FacebookSession.php');
require_once($_SERVER['DOCUMENT_ROOT'].'/sys/facebook/FacebookRequest.php');
require_once($_SERVER['DOCUMENT_ROOT'].'/sys/facebook/GraphObject.php');
require_once($_SERVER['DOCUMENT_ROOT'].'/sys/facebook/FacebookRequestException.php');

use Facebook\FacebookSession;
use Facebook\FacebookRequest;
use Facebook\GraphObject;
use Facebook\FacebookRequestException;

$message = safe($_POST["message"]);
$url = safe($_POST["url"]);
$image = safe($_POST["image"]);

if($message == "" OR $url == "" OR $image == ""){
    echo "incomplete";
    return;
}

FacebookSession::setDefaultApplication('{APP ID}','{APP SECRET}');
$session = new FacebookSession('{Page Access Token}');

if($session) {
    try {
        $response = (new FacebookRequest(
            $session, 'POST', '/{Page ID}/feed', array(
                'message'       => $message,
                'link'          => $url,
                'picture'       => $image
            )
        ))->execute()->getGraphObject();
        echo "Posted with id: " . $response->getProperty('id');
    } catch(FacebookRequestException $e) {
        echo "Exception occured, code: " . $e->getCode();
        echo " with message: " . $e->getMessage();
    }
} else {
    echo "No Session available!";
}