cant initialize php facebook sdk

Question

I'm trying to do a very simple task. Initialize the facebook php sdk and return my user id. I'm wondering if there is a problem with the require_once path I have included to access the sdk, but I'm not sure. My echo message works, but nothing else. I have tried writing the require_once path a few different ways to see if it was the problem, but nothing worked.

<?php


echo "hello world";

require_once(dirname(__FILE__).'/php-sdk/facebook.php');

$APPLICATION_ID = '396***8';
$APPLICATION_SECRET = '134559c****eb4f2da';

$config = array();
$config['appId'] = $APPLICATION_ID;
$config['secret'] = $APPLICATION_SECRET;

$facebook = new Facebook(config);

$uid = $facebook->getUser();

echo $uid;






?>

Answer 1

The config array you pass to the constructor is wrong, it's missing the $ sign. That will give your parsing error.

$facebook = new Facebook(config); // HERE, missing $ sign for config array

If that's just a typo here, follow below.

You could try adding a die() statement after the require_once statement so to be sure it is that causing the problem. This will at least give you certainty of where the problem is.

require_once('<filename>') or die('Error is here!');

You can also check your PHP error log for any helpful error messages.

Answer 2

Assuming that is the entire PHP code on your page, it is working as intended, getUser() should return 0 as there is no logic that authorizes a user. You need a login handling logic for the user with either the JS SDK or getLoginUrl() function see the example https://github.com/facebook/facebook-php-sdk/blob/master/examples/example.php .

Also check to ensure you are running the latest SDK (3.2.2) https://github.com/facebook/facebook-php-sdk/