Contao\CoreBundle\Config\Loader\XliffFileLoader::quoteKey PHP Méthode

    private function quoteKey($key)
    {
        if ('0' === $key) {
            return 0;
        }
        if (is_numeric($key)) {
            return intval($key);
        }
        return "'" . str_replace("'", "\\'", $key) . "'";
    }