yii2/extensions/apidoc/helpers/ApiIndexer.php

<?php
/**
 * 
 * 
 * @author Carsten Brandt <mail@cebe.cc>
 */

namespace yii\apidoc\helpers;


use cebe\jssearch\Indexer;
use cebe\jssearch\tokenizer\StandardTokenizer;
use cebe\jssearch\TokenizerInterface;
use yii\helpers\StringHelper;

class ApiIndexer extends Indexer
{
    protected function generateFileInfo($file, $contents, $basePath, $baseUrl)
   	{
   		// create file entry
   		if (preg_match('~<h1>(.*?)</h1>~s', $contents, $matches)) {
   			$title = str_replace('&para;', '', strip_tags($matches[1]));
   		} elseif (preg_match('~<title>(.*?)</title>~s', $contents, $matches)) {
   			$title = strip_tags($matches[1]);
   		} else {
   			$title = '<i>No title</i>';
   		}

        if (preg_match('~<div id="classDescription">\s*<strong>(.*?)</strong>~s', $contents, $matches)) {
            $description = strip_tags($matches[1]);
        } elseif (preg_match('~<p>(.*?)</p>~s', $contents, $matches)) {
            $description = strip_tags($matches[1]);
            if (mb_strlen($description) > 1000) { // TODO truncate by words
                $description = mb_substr($description, 0, 1000) . '...';
            }
        } else {
            $description = '';
        }

   		return [
   			'u' => $baseUrl . str_replace('\\', '/', substr($file, strlen(rtrim($basePath, '\\/')))),
   			't' => $title,
   			'd' => $description,
   		];
   	}

    /**
   	 * @return TokenizerInterface
   	 */
   	public function getTokenizer()
   	{
        $tokenizer = parent::getTokenizer();
        if ($tokenizer instanceof StandardTokenizer) {
            // yii is part of every doc and makes weird search results
            $tokenizer->stopWords[] = 'yii';
            $tokenizer->stopWords = array_unique($tokenizer->stopWords);
        }
   		return $tokenizer;
   	}
}