yii\helpers\BaseInflector::transliterate PHP Method

    public static function transliterate($string, $transliterator = null)
    {
        if (static::hasIntl()) {
            if ($transliterator === null) {
                $transliterator = static::$transliterator;
            }
            return transliterator_transliterate($transliterator, $string);
        } else {
            return strtr($string, static::$transliteration);
        }
    }