in search of... integrating site search

Ian Barber@ianbarber

http://phpir.comian@ibuildings.com

http://joind.in/talk/view/1462

In Search Of...integrating site search

what do you want?

How Search WorksIntegrating SearchImproving Results

Using SearchSearch Performance

Questions

DocumentDocumentDocumentDocumentAnalyser

Query Parser

QueryQueryQueryQuery

ResultResultResultResult

With AT&T’s help, the F.B.I Miami-Dade office had recovered $1.1 million from O’Healy’s Ponzi scheme, 10-15% more than expected.

Tokenisation

“”

PHP Tokenisation

function tokenise($string) { $string = strtolower($string); preg_match_all('/\w+/', $string, $matches, PREG_OFFSET_CAPTURE); return $matches[0];}

Document Term PairsDocument ID Term

1 the 1 best1 of1 the ... ...

204 and 204 what204 would

Inverted IndexTerm Documents

best 1 (4, 16), 4 (422), 129 (344) ...

what 24 (50, 98), 75 (33, 208) ...

would 99 (32, 599), 201 (344) ..

... ...

Boolean Query MergeQuery: Best Western Hotel

Result: Document 298

best 1 4 129 298 305 338western 4 95 194 204 298 305

hotel 2 40 200 298 355 402working 4 298 305

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed sit amet ante vitae enim elementum semper sodales quis ipsum. Aliquam vel condimentum neque. Curabitur ornare feugiat ornare. Donec consectetur elit metus. Nulla eleifend tincidunt massa et euismod. Vestibulum vestibulum, justo vel egestas elementum, purus enim ornare quam, vel gravida est enim vel nibh.

Nam non eros nisi, eget fringilla justo. Fusce vel risus vitae mauris vehicula facilisis sit amet in mi. Nulla ut turpis id felis sollicitudin dictum sed non ipsum. Praesent ut risus nulla, sed blandit leo. Curabitur volutpat laoreet lacus, ut consectetur arcu vestibulum vel. Donec dapibus fringilla arcu, et semper lacus egestas non. Quisque eu purus ut lacus egestas dapibus. Integer in velit id est dictum bibendum in id mi.

Nam non eros nisi, eget fringilla justo. Fusce vel risus vitae mauris vehicula facilisis sit amet in mi. Nulla ut turpis id felis sollicitudin dictum sed non ipsum. Praesent ut risus nulla, sed blandit leo. Curabitur volutpat laoreet lacus, ut consectetur arcu vestibulum vel. Donec dapibus fringilla arcu, et semper lacus

Nam non eros nisi, eget fringilla justo. Fusce vel risus vitae mauris vehicula facilisis sit amet in mi. Nulla ut turpis id felis sollicitudin dictum sed non ipsum. Praesent ut risus nulla, sed blandit leo. Curabitur volutpat laoreet lacus, ut consectetur arcu vestibulum vel. Donec dapibus fringilla arcu, et semper lacus Lorem ipsum dolor sit amet,

consectetur adipiscing elit. Sed sit amet ante vitae enim elementum semper sodales quis ipsum. Aliquam vel condimentum neque. Curabitur ornare feugiat ornare. Donec consectetur elit metus. Nulla eleifend tincidunt massa et euismod. Vestibulum vestibulum, justo vel egestas elementum, purus enim ornare quam, vel gravida est enim vel nibh.

TF-IDF

function getWeight($docID, $term, $total) { $tf = count($term[$docID]); $idf = log($total / count($term), 2); return $tf * $idf;}

Document Vector

socket what heavy steel ...

Doc 1 0.02 0.3 0.001 0 ...

Doc 2 0 0 0 0 ...

Doc 3 0.001 0.2 0 0 ...

Doc 4 0 0 0.002 0.003 ...

best 23 42 179 246 333 703

weight 0.008 0.002 0.023 0.039 0.014 0.001

western 42 88 120 179 246 798

weight 0.003 0.004 0.023 0.001 0.034 0.004

1 - 246: 0.0732 - 179: 0.0243 - 120: 0.023

Ranked Query Merge

PHP Similarityfunction score($queryString, $index) { $query = tokenize($queryString); $matches = array(); foreach($query as $qterm) { $postings = $index[$qterm]; foreach($postings as $id => $posting) { $matches[$id] += $posting['score']; } } return arsort($matches);}

Integrating Search

CREATE TABLE example ( id INT(11) NOT NULL auto_increment, title VARCHAR(255), content TEXT, PRIMARY KEY(id), FULLTEXT(title,content)) Engine=MyISAM;

INSERT INTO example (title, content) VALUES ('Mikko & Bacon','Mikko loves bacon'),('Marcello & Bacon','Marcello hates bacon'),('Jo & Sausages','Johanna loves sausages'),('Hollywood & Garlic','Lorenzo hates garlic'),('James & Cheddar','James is keen on cheeses');

MySQL Full Text Search

MySQL FTI QuerySELECT * FROM example WHERE MATCH(title,content) AGAINST('loves bacon');

Looking At The Index/var/lib/mysql/fttest# myisam_ftdump example 1

Total rows: 5Total words: 17Unique words: 14Longest word: 9 chars (hollywood)Median length: 5Average global weight: 1.176117Most common word: 2 times, weight: 0.405465 (bacon)

Sphinx http://www.sphinxsearch.com

Sphinx Configurationsource posts{ type = mysql sql_host = localhost sql_user = user sql_pass = password sql_db = search

sql_query = \ SELECT id, title, content FROM example; sql_attr_multi = uint tag from query; \ SELECT example_id, tag_id FROM tags;}

index posts{ source = posts path = /var/data/sphinx/example morphology = stem_en

min_word_len = 3 min_prefix_len = 3 min_infix_len = 0 enable_star = 1}

Stemming

happeninghappenedhappens

http://tartarus.org/~martin/PorterStemmer

- happen- happen- happen

Command Line Searchingindexer --config /etc/sphinx.conf --allsearch --config /etc/sphinx.conf love bacon

displaying matches:1. document=1, weight=3, tag=(1,2)! id=1! title=Mikko & Bacon! content=Mikko loves baconwords:1. 'love': 2 documents, 2 hits2. 'bacon': 2 documents, 4 hits

searchd --config /etc/sphinx.conf

Sphinx From PHP

$cl = new SphinxClient();$cl->SetServer('localhost', 3312);$cl->SetMatchMode(SPH_MATCH_ANY);

$result = $cl->Query('bac*');$docIDs = array_keys($result["matches"]);

$cl->SetFilter('tag', array(1));$result = $cl->Query('bac*');$docIDs = array_keys($result["matches"]);

Swish-E . http://swish-e.org

pecl install swish-beta

Filesystem Index With Swish-E

IndexDir /var/data/documentsIndexFile fs-swish-e.indexIndexOnly .doc .docx .pdfFuzzyIndexingMode Stemming_en1

FileFilter .pdf /usr/local/bin/swish_filter.plFileFilter .doc /usr/local/bin/swish_filter.pl

fs-swish-e.conf

/usr/local/bin/swish-e -S fs -c fs-swish-e.conf

Crawling Content

IndexDir /usr/local/lib/swish-e/spider.plIndexFile www-swish-e.indexSwishProgParameters default http://phpir.com/

FuzzyIndexingMode Stemming_en1DefaultContents HTML

www-swish-e.conf

/usr/local/bin/swish-e -S prog -c www-swish-e.conf

Swish-E With Multiple Indices$swish = new Swish( 'www-swish-e.index fs-swish-e.index');$search = $swish->prepare();

$queryStr = 'search string goes here';$result = $search->execute($queryStr);$total = $result->hits;

while($r = $result->nextResult()) { echo $r->swishdocpath; // url}

Lucene

$index = Zend_Search_Lucene::create('idx');foreach($documents as $title => $content) { $doc = new Zend_Search_Lucene_Document(); $doc->addField( Zend_Search_Lucene_Field::Text( 'title', $title)); $doc->addField( Zend_Search_Lucene_Field::UnStored( 'content', $content)); $index->addDocument($doc);}

Build Index

$results = $index->find('loves bacon');foreach($results as $result) { echo $result->score, " "; echo $result->title, "\n";} Output: 0.81656279309067 Mikko and Bacon0.24800278854758 Marcello & Bacon

Query Zend Search Lucene

$file = file_get_contents($url);

$doc = Zend_Search_Lucene_Document_Html:: loadHTML($file);

$doc->addField( Zend_Search_Lucene_Field::Text( 'url', $url);$index->addDocument($doc)

Index HTML

Solr http://lucene.apache.org/solr/

Solr Search Index$options = array( 'hostname' => 'localhost', 'port' => 8983 );

$client = new SolrClient($options);$doc = new SolrInputDocument();$doc->addField('id', $id);$doc->addField('cat', $category);$doc->addField('title', $title);$doc->addField('text', $text);$response = $client->addDocument($doc);$client->commit();

Solr Search Client$client = new SolrClient($options);

$query = new SolrQuery('bacon');$response = $client->query($query);$r = $response->getResponse();

foreach($r['response']['docs'] as $d) { echo $d->title[0] . "\n";}

Xapian .

http://xapian.org

Xapian In PHP$db = new XapianWritableDatabase( 'idx', Xapian::DB_CREATE_OR_OPEN);$i = new XapianTermGenerator();$i->set_stemmer(new XapianStem("english"));

$doc = new XapianDocument();$doc->set_data($content);$doc->add_value(1, $title);

$i->set_document($doc);$i->index_text($content);$db->add_document($doc);

Xapian Search In PHP

$database = new XapianDatabase('idx');$enquire = new XapianEnquire($database);$qp = new XapianQueryParser();$qp->set_stemmer(new XapianStem("english"));$qp->set_database($database);$qp->set_stemming_strategy( XapianQueryParser::STEM_SOME);$query = $qp->parse_query($queryString);

$enquire->set_query($query);

$matches = $enquire->get_mset(0, 10);

$i = $matches->begin();while(!$i->equals($matches->end())) { $n = $i->get_rank() + 1; $data = $i->get_document()->get_data(); $title = $i->get_document()->get_value(1); $score = $i->get_percent(); $i->next();}

Improving Results

Anchor Text

$p = file_get_contents('http://phpir.com');

libxml_use_internal_errors(true);$dom = DomDocument::loadHTML($p);$links = $dom->getElementsByTagName('a');

foreach($links as $link) { $href = $link->getAttribute('href'); $text = $link->nodeValue;}

Parse Anchor Text

Zone Weighting

ZSL Zone Weighting

$doc = new Zend_Search_Lucene_Document();

$tfield = Zend_Search_Lucene_Field::Text ('title', $title);$tfield->boost = 1.3;$doc->addField($tfield);

$doc->addField( Zend_Search_Lucene_Field::UnStored ('content', $content));

$index->addDocument($doc);

Document Authority

Document Weights in ZSL$doc = new Zend_Search_Lucene_Document();$doc->addField( Zend_Search_Lucene_Field::Text ('title', $title));$doc->addField( Zend_Search_Lucene_Field::UnStored ('content', $content));

$doc->boost = 1 + ($numComments / 100);

$index->addDocument($doc);

Using Search

Summaries & Highlighting

Sphinx Extract & Highlight$cl = new SphinxClient();$cl->SetServer( "localhost", 3312 );$q = 'bacon';$r = $cl->Query($q);foreach ($r["matches"] as $doc => $info) { $text[$doc] = getTextFromDB($doc);}

$e = $cl->BuildExcerpts($text, 'posts', $q);foreach($extracts as $extract) { echo $extract;}

Xapian Spelling Correction$indexer = new XapianTermGenerator();$indexer->set_database($database);$indexer->set_flags( XapianTermGenerator::FLAG_SPELLING);

Indexer

$queryString = "strreplace or str_cmp";$q = new XapianQueryParser();$q->set_database($database);$query = $q->parse_query($queryString, XapianQueryParser::FLAG_SPELLING_CORRECTION);echo "Did you mean: " . $q->get_corrected_query_string() . "\n";

Searcher

Spelling Correction Output php xapsearch.php

Did you mean: str_replace or strcmp

4644 results found for “strreplace or str_cmp”:1: 2% docid=572 [phpdocs/html/cc.license.html]2: 2% docid=7169 [phpdocs/html/imagick.constants.html]3: 2% docid=10086 [phpdocs/html/sqlite3result.fetcharray.html]4: 2% docid=6132 [phpdocs/html/function.swf-posround.html]

Results Sorting

Sorting in ZSL

$q = Zend_Search_Lucene_Search_QueryParser:: parse('search string');

$results = $index->find($q, 'title');foreach($results as $result) { echo '<h3>', $result->title, "</h3>\n"; $doc = getDocumentFromDB($result->did); echo $q->htmlFragmentHighlightMatches($doc);}

Faceted Search

Faceted Search In Solr$client = new SolrClient($options);$query = new SolrQuery('bacon');$response = $client->query($query);$query->setFacet(true);$query->addFacetField('cat');$r = $response->getResponse();$f = $r['facet_counts']['facet_fields'];foreach($f['cat'] as $facet => $count) { echo $facet . " " . $count . "\n";}

in search of... integrating site search

ornare vel egestas elementum

vestibulum ipsum

consectetur enim vel

justo vel egestas elementum

donec vestibulum vestibulum

justo consectetur elementum

justo feugiat ornare

vel gravida est donec

Technology

beam-stack search: integrating backtracking with beam search

example-centric programming: integrating web search into the

integrating rss into your web site

in search of: integrating site search (php barcelona)

integrating pr, search, and social 6 28-2011

integrating myproxy with site authentication

integrating thesaurus relationships into search and browse -...

integrating the bcs with search in sharepoint 2013

integrating sql databases with content-specific search...

integrating google search appliance with mura cms

in search of: integrating site search (ipc)

integrating seo & ppc search marketing

paid search full court press: integrating paid search into...

integrating sql data into your plone site

the search process: integrating the investigation and

integrating study abroad experiences into the job search

integrating social media and search strategies

datasheet search site | · 2017. 7. 3. · title:...

integrating source code search into git client for

site-wide search