Habari\Format::summarize PHP Метод

    public static function summarize($text, $count = 100, $max_paragraphs = 1)
    {
        $ellipsis = '…';
        $showmore = false;
        $ht = new HtmlTokenizer($text, false);
        $set = $ht->parse();
        $stack = array();
        $para = 0;
        $token = $set->current();
        $summary = new HTMLTokenSet();
        $set->rewind();
        $remaining_words = $count;
        // $bail lets the loop end naturally and close all open elements without adding new ones.
        $bail = false;
        for ($token = $set->current(); $set->valid(); $token = $set->next()) {
            if (!$bail && $token['type'] == HTMLTokenizer::NODE_TYPE_ELEMENT_OPEN) {
                $stack[] = $token;
            }
            if (!$bail) {
                switch ($token['type']) {
                    case HTMLTokenizer::NODE_TYPE_TEXT:
                        $words = preg_split('/(\\s+)/u', $token['value'], -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
                        // word count is doubled because spaces between words are captured as their own array elements via PREG_SPLIT_DELIM_CAPTURE
                        $words = array_slice($words, 0, $remaining_words * 2);
                        $remaining_words -= count($words) / 2;
                        $token['value'] = implode('', $words);
                        if ($remaining_words <= 0) {
                            $token['value'] .= $ellipsis;
                            $summary[] = $token;
                            $bail = true;
                        } else {
                            $summary[] = $token;
                        }
                        break;
                    case HTMLTokenizer::NODE_TYPE_ELEMENT_CLOSE:
                        // don't handle this case here
                        break;
                    default:
                        $summary[] = $token;
                        break;
                }
            }
            if ($token['type'] == HTMLTokenizer::NODE_TYPE_ELEMENT_CLOSE) {
                if (count($stack) > 0 && in_array($token['name'], Utils::array_map_field($stack, 'name'))) {
                    do {
                        $end = array_pop($stack);
                        $end['type'] = HTMLTokenizer::NODE_TYPE_ELEMENT_CLOSE;
                        $end['attrs'] = null;
                        $end['value'] = null;
                        $summary[] = $end;
                    } while (($bail || $end['name'] != $token['name']) && count($stack) > 0);
                } else {
                    $end['name'] = $token['name'];
                    $end['type'] = HTMLTokenizer::NODE_TYPE_ELEMENT_CLOSE;
                    $end['attrs'] = null;
                    $end['value'] = null;
                }
                if (count($stack) == 0) {
                    $para++;
                }
                if ($bail || $para >= $max_paragraphs) {
                    break;
                }
            }
        }
        return (string) $summary;
    }