Пару вопросов о Fenom

<?php

$search = $modx->getOption('search', $scriptProperties, $_GET['search']);
$text = (isset($input)) ? $input : $modx->getOption('text', $scriptProperties, '');
$length = (isset($options)) ? $options : $modx->getOption('length', $scriptProperties, 200);
$ellipsis = $modx->getOption('ellipsis', $scriptProperties, '...');

if (empty($search) || empty($text)) {
  return $text;
}

if (!function_exists('createExtract')) {
  function createExtract($text, $length = 200, $search = '', $ellipsis = '...') {
    global $modx;

    $text = strip_tags($text);
    $text = preg_replace('/(\[\[\+.*?\]\])/i', '', $text);
    $text = $modx->stripTags($text);
    $text = trim(preg_replace('/\s+/u', ' ', $text));

    if (empty($text)) return '';

    $useMb = $modx->getOption('use_multibyte',null,false) && function_exists('mb_strlen');
    $encoding = $modx->getOption('modx_charset',null,'UTF-8');

    $trimChars = "\t\r\n -_()!~?=+/*\\,.:;\"'[]{}`&";

    if ($useMb) {
      $wordPos = mb_strpos(mb_strtolower($text,$encoding), mb_strtolower($search,$encoding),null,$encoding);
      $halfSide = intval($wordPos - $length / 2 + mb_strlen($search, $encoding) / 2);
      if ($halfSide > 0) {
        $halfText = mb_substr($text, 0, $halfSide, $encoding);
        $pos_start = max(mb_strrpos($halfText, ' ', 0, $encoding), mb_strrpos($halfText, '.', 0, $encoding));
        if (!$pos_start) {
          $pos_start = 0;
        }
      } else {
        $pos_start = 0;
      }
      if ($wordPos && $halfSide > 0) {
        $l = $pos_start + $length - 1;
        $realLength = mb_strlen($text,$encoding);
        if ($l > $realLength) { $l = $realLength; }
        $pos_end = min(mb_strpos($text, ' ',$l, $encoding), mb_strpos($text, '.', $l, $encoding)) - $pos_start;
        if (!$pos_end || $pos_end <= 0) {
          $extract = $ellipsis . ltrim(mb_substr($text, $pos_start, mb_strlen($text, $encoding), $encoding), $trimChars);
        } else {
          $extract = $ellipsis . trim(mb_substr($text, $pos_start, $pos_end, $encoding), $trimChars) . $ellipsis;
        }
      } else {
        $l = $length - 1;
        $trueLength = mb_strlen($text,$encoding);
        if ($l > $trueLength) $l = $trueLength;
        $pos_end = min(mb_strpos($text, ' ',$l, $encoding), mb_strpos($text, '.', $l, $encoding));
        if ($pos_end) {
          $extract = rtrim(mb_substr($text, 0, $pos_end, $encoding), $trimChars) . $ellipsis;
        } else {
          $extract = $text;
        }
      }
    } else {
      $wordPos = strpos(strtolower($text), strtolower($search));
      $halfSide = intval($wordPos - $length / 2 + strlen($search) / 2);
      if ($halfSide > 0) {
        $halfText = substr($text, 0, $halfSide);
        $pos_start = max(strrpos($halfText, ' '), strrpos($halfText, '.'));
        if (!$pos_start) {
          $pos_start = 0;
        }
      } else {
        $pos_start = 0;
      }
      if ($wordPos && $halfSide > 0) {
        $l = $pos_start + $length - 1;
        $realLength = strlen($text);
        if ($l > $realLength) { $l = $realLength; }
        $pos_end = min(strpos($text, ' ', $l), strpos($text, '.', $l)) - $pos_start;
        if (!$pos_end || $pos_end <= 0) {
          $extract = $ellipsis . ltrim(substr($text, $pos_start), $trimChars);
        } else {
          $extract = $ellipsis . trim(substr($text, $pos_start, $pos_end), $trimChars) . $ellipsis;
        }
      } else {
        $pos_end = min(strpos($text, ' ', $length - 1), strpos($text, '.', $length - 1));
        if ($pos_end) {
          $extract = rtrim(substr($text, 0, $pos_end), $trimChars) . $ellipsis;
        } else {
          $extract = $text;
        }
      }
    }

    return $extract;
  }
}

$extract = createExtract($text, $length, $search, $ellipsis);
$extract = strip_tags(preg_replace("#\<!--(.*?)--\>#siu",'',$extract));
$extract = preg_replace("#\[\[(.*?)\]\]#siu",'',$extract);
$extract = str_replace(array('[[',']]'),'',$extract);

$output = preg_replace("/$search/iu", "<span class=\"extract\">$0</span>", $extract);

return $output;

// модификатор если есть $_GET['search']
{$content | extract : 100}

// сниппет
{'extract' | snippet : [
	'text' => $content,
	'search' => $.get.search,
	'length' => 200,
	'ellipsis' => '...'
]}

//минимальный вызов если есть $_GET['search']
{'extract' | snippet : [
	'text' => $content
]}