luya\TagParser::processText PHP Method

    private function processText($text)
    {
        // verify if content is a string otherwhise just return the original provided content
        if (!is_string($text) || empty($text)) {
            return $text;
        }
        // find all tags based on the REGEX expression
        preg_match_all(static::REGEX, $text, $results, PREG_SET_ORDER);
        // foreach all the results matches the regex
        foreach ($results as $row) {
            // When value is empty (can be caused by using `link[]` we have to skip this item.
            if (empty($row['value'])) {
                continue;
            }
            $tag = $row['function'];
            if ($this->hasTag($tag)) {
                $replace = $this->evalTag($tag, $row);
                $text = preg_replace('[' . preg_quote($row[0]) . ']mi', $replace, $text, 1);
            }
        }
        return $text;
    }