/**
* Generates a nonce that helps prevent XSS and duplicate submissions
*
* @return string The generated nonce
*/
protected function generate_nonce()
{
// Checks for an existing nonce before creating a new one
if (empty(self::$nonce)) {
self::$nonce = base64_encode(uniqid(NULL, TRUE));
$_SESSION['nonce'] = self::$nonce;
}
return self::$nonce;
}
