/**
* Return an instance of the FacebookClient
*
* @param FacebookClientConfig $config
*
* @return FacebookClient
*/
public static function getInstance(FacebookClientConfig $config = null)
{
global $fbAppId, $fbAppSecret;
// If an instance hasn't been created yet, create one
if (empty(self::$instance)) {
// See if an alternate config has been passed in
if (empty($config)) {
$config = (new FacebookClientConfig())->setAppID($fbAppId)->setAppSecret($fbAppSecret);
}
self::$instance = new FacebookClient($config);
}
return self::$instance;
}
