function friendOrStranger($dataBase, $table, $receiver_id)
{
    //    $db = new Connect($dataBase,$table);
    $template = new Template();
    $check = $template->selectWhere($dataBase, $table, array('sender_id' => $_SESSION['userId'], 'receiver_id' => $receiver_id));
    if ($check) {
        $template->delete($dataBase, $table, $_SESSION['userId'], $receiver_id);
        $returnResult = 'Добави';
    } else {
        $template->insert($dataBase, $table, array('sender_id' => $_SESSION['userId'], 'receiver_id' => $receiver_id));
        $returnResult = 'Премахни';
    }
    return json_encode($returnResult);
}