Simpletags::_parse_lang PHP Method

    private function _parse_lang($content)
    {
        $trigger = 'lang:';
        $orig_content = $content;
        $open_tag_regex = $this->_l_delim . $trigger . '.*?' . $this->_r_delim;
        while (($start = strpos($orig_content, $this->_l_delim . $trigger)) !== FALSE) {
            $content = $orig_content;
            if (!preg_match('/' . $open_tag_regex . '/i', $content, $tag)) {
                break;
            }
            // We use these later
            $tag_len = strlen($tag[0]);
            $full_tag = $tag[0];
            // Trim off the left and right delimeters
            $tag = trim($full_tag, $this->_l_delim . $this->_r_delim);
            // Get the segments of the tag
            $segments = preg_replace('/(.*?)\\s+.*/', '$1', $tag);
            // Lets start to create the parsed tag
            $parsed['full_tag'] = $full_tag;
            $parsed['full_segments'] = str_replace($trigger, '', $segments);
            $parsed['segments'] = $this->_parse_segments($parsed['full_segments']);
            // Lets trim off the first part of the content
            $content = substr($content, $start + $tag_len);
            $parsed['content'] = '';
            $parsed['marker'] = 'marker_' . $this->_tag_count . $this->_mark;
            $orig_content = str_replace($parsed['full_tag'], $parsed['marker'], $orig_content);
            $parsed_tags[] = $parsed;
            $this->_tag_count++;
        }
        if (empty($parsed_tags)) {
            return $orig_content;
        }
        // Lets replace all the lang tags
        foreach ($parsed_tags as $key => $tag) {
            // Parse the single tags
            if (empty($tag['content'])) {
                $return_data = $this->_parse_lang_single($tag);
            }
            // If the tag referenced data then put that data in the content
            if ($return_data) {
                $orig_content = str_replace($tag['marker'], $return_data, $orig_content);
                unset($parsed_tags[$key]);
            }
        }
        return $orig_content;
    }