In Search Of: Integrating Site Search (PHP Barcelona)

In Searchsite search integrating Of... Ian Barber @ianbarber http://phpir.com ian@ibuildings.com Friday, 29 October 2010

How Search Works Integrating Search Improving Results Using Search Search Performance Questions 2 Friday, 29 October 2010

3 Friday, 29 October 2010

Query Query Query Query Query Parser Result Result Result Result Index Analyser Document Document Document Document 4 Friday, 29 October 2010

Tokenisation “ 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. 5 Friday, 29 October 2010

PHP Tokenisation function tokenise($string) { $string = strtolower($string); preg_match_all('/w+/', $string, $matches, PREG_OFFSET_CAPTURE); return $matches[0]; } 6 Friday, 29 October 2010

Document Term Pairs Document ID Term 1 the 1 best 1 of 1 the ... ... 204 and 204 what 204 would 7 Friday, 29 October 2010

Inverted Index Term Documents best 1 (4, 16), 4 (422), 129 (344) ... what 24 (50, 98), 75 (33, 208) ... would 99 (32, 599), 201 (344) .. ... ... 8 Friday, 29 October 2010

Boolean Query Merge Query: Best Western Hotel best 1 4 129 298 305 338 western 4 95 194 204 298 305 working 4 298 305 hotel 2 40 200 298 355 402 Result: Document 298 9 Friday, 29 October 2010

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Nulla ut turpis id facilisis sit consectetur adipiscing elit.et semper lacus sollicitudin dictum sed non ipsum. dapibus fringilla arcu, Sed sit amet ante felis felis sollicitudin dictum sed non ipsum. Nam non eros nisi, eget fringilla justo. Nam non eros nisi, eget fringilla justo. Fusce vel vitae enim elementum semper sodales quis ipsum. Aliquam vel condimentum neque. Praesent ut risus nulla, sed blandit leo. utrisus vitae mauris vehicula Praesent risus nulla, sed blandit leo. Fusce vel Curabitur volutpat laoreet lacus, ut Curabitur volutpat laoreet lacus, ut Curabitur ornare feugiat ornare. Donec consectetur arcu vestibulum vel. Donec sit arcu vestibulum vel. turpis id facilisis amet in mi. Nulla ut risus vitae mauris vehicula facilisis sit amet in Lorem ipsum dolor sit amet, consectetur consectetur elit metus. Nulla eleifendadipiscing elit. Sed sit amet ante felis sollicitudin dictum sed non ipsum. consectetur Donec Lorem ipsum dolor sit amet, dapibus fringilla arcu, etLorem ipsum dolor sit amet, et semper lacus semper lacus fringilla nulla, sed blandit leo. dapibus ut risus arcu, consectetur adipiscing enimSed vitae elit. elementum ante quis Praesent tincidunt massa et euismod. Vestibulumsit amet semper sodalesconsectetur adipiscing elit. Sed sit amet ante mi. Nulla ut turpis id felis sollicitudin dictum vestibulum, justo vel egestas elementum, vitae enim elementum semper sodales quis vitae Curabitur volutpat laoreet lacus, ut ipsum. Aliquam vel condimentum neque. enim elementum semper sodales quis purus enim ornare quam,vel condimentum feugiat ornare. Donec Curabitur ornare neque. vel gravida est consectetur arcu vestibulum vel. Donec sed non ipsum. Praesent ut risus nulla, sed ipsum. Aliquam enim vel nibh. Curabitur ornare feugiat ornare. metus. ipsum. Aliquam vel condimentum neque. consectetur elit Donec Nulla eleifend Curabiturdapibus feugiat ornare.et semper lacus ornare fringilla arcu, Donec tincidunt massa et euismod. Vestibulum blandit leo. Curabitur volutpat laoreet lacus, ut consectetur elit metus. Nulla eleifend vestibulum,Loremvel egestas elementum, Nam non eros nisi, eget fringilla justo. justo ipsum dolor sit amet, tincidunt massa et euismod. Vestibulum consectetur elit metus. Nulla eleifend tincidunt ipsum dolor sit amet, Lorem massa et euismod. Vestibulum purus enim ornare quam, vel gravidaSed sit amet ante vel egestas elementum, consectetur adipiscing elit. est Fusce vel risus vitaejusto vel egestas elementum, vestibulum, mauris vehicula consectetur arcu vestibulum vel. Donec dapibus enim vel vitae enim est nibh. sit amet in ornare quam, vel id vestibulum, justo consectetur adipiscing elit. Sed sit amet ante facilisis purus enim mi. Nulla ut turpisgravida elementum semper sodales quis purus enim ornare quam, vel gravida est vitae enim elementum semper sodales quis felis sollicitudin dictum sed non ipsum. Aliquam vel condimentum vel nibh. vel condimentum neque. enim vel nibh. ipsum. enim neque. fringilla arcu, et semper lacus egestas non. Praesent ut risus nulla, sed blandit leo. nisi, eget fringilla Nam non eros ipsum. Aliquam Curabitur ornare feugiatjusto. Donec ornare. Curabitur ornare feugiat ornare. Donec consectetur elit metus. Nulla eleifend Curabitur volutpateros nisi,lacus, fringilla vitae mauris vehicula consectetur elit metus. Nulla eleifend Nam non laoreet egetvel risus justo. Fusce ut Nam non eros nisi, eget fringilla justo. Quisque eu purus ut lacus egestas dapibus. consectetur arcu vestibulum vel. Donec inmassa et euismod. Vestibulum tincidunt Fusce vel risus vitae mauris amet mi. Nulla ut turpis tincidunt massavitae mauris Vestibulum facilisis sit vehicula id Fusce vel risus et euismod. vehicula felis sollicitudin dictum vel egestas vestibulum,amet in mi. Nulla elementum, vestibulum, justo dapibus fringilla arcu, et semper lacus turpis id sed non ipsum. facilisis sit amet in mi. Nulla ut elementum, facilisis sit justo vel egestas ut turpis id Integer in velit id est dictum bibendum in id mi. purus enim ornareblandit vel gravida est felis sollicitudin dictum sed non ipsum. sed Praesent ut risus nulla, enim vel nibh. quam, leo. purus enim ornare quam, velnon ipsum. felis sollicitudin dictum sed gravida est Praesent ut risus Curabitur volutpat laoreet lacus, ut enim vel ut risus nulla, sed blandit leo. nulla, sed blandit leo. Praesent nibh. consectetur arcu vestibulum vel. Donec Curabitur volutpat laoreet lacus, ut Curabitur volutpat laoreet lacus, ut dapibus Nam nonarcu, nisi, eget fringilla justo. arcu vestibulum vel. Donec fringilla eros consectetur arcu vestibulum vel. Donec et semper lacus consectetur Nam non eros nisi, eget fringilla justo. Fusce vel risus vitae mauris vehicula dapibus fringilla arcu, et semper lacus Fusce velfringilla arcu, et semper lacus dapibus risus vitae mauris vehicula facilisis sit amet in mi. Nulla ut turpis id facilisis sit amet in mi. Nulla ut turpis id felis sollicitudin dictum sed non ipsum. felis sollicitudin dictum sed non ipsum. Praesent ut risus nulla, sed blandit leo. Praesent ut risus nulla, sed blandit leo. Curabitur volutpat laoreet lacus, ut Curabitur volutpat laoreet lacus, ut consectetur arcu vestibulum vel. Donec consectetur arcu vestibulum vel. Donec dapibus fringilla arcu, et semper lacus dapibus fringilla arcu, et semper lacus Friday, 29 October 2010

TF-IDF function getWeight($docID, $term, $total) { $tf = count($term[$docID]); $idf = log($total / count($term), 2); return $tf * $idf; } 11 Friday, 29 October 2010

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 ... 12 Friday, 29 October 2010

Ranked Query Merge 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: 0.073 2 - 179: 0.024 3 - 120: 0.023 13 Friday, 29 October 2010

PHP Similarity function 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); } 14 Friday, 29 October 2010

Integrating Search 15 Friday, 29 October 2010

MySQL Full Text 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'); 16 Friday, 29 October 2010

Sphinx http://www.sphinxsearch.com 18 Friday, 29 October 2010

Sphinx Conﬁguration source 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; } 19 Friday, 29 October 2010

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 } 20 Friday, 29 October 2010

Stemming http://tartarus.org/~martin/PorterStemmer happening - happen happened - happen happens - happen 21 Friday, 29 October 2010

Command Line Searching indexer --config /etc/sphinx.conf --all search --config /etc/sphinx.conf love bacon displaying matches: 1. document=1, weight=3, tag=(1,2) ! id=1 ! title=Mikko & Bacon ! content=Mikko loves bacon words: 1. 'love': 2 documents, 2 hits 2. 'bacon': 2 documents, 4 hits searchd --config /etc/sphinx.conf 22 Friday, 29 October 2010

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"]); 23 Friday, 29 October 2010

Swish-E http://swish-e.org pecl install swish-beta 24 Friday, 29 October 2010

Filesystem Index With Swish-E /usr/local/bin/swish-e -S fs -c fs-swish-e.conf fs-swish-e.conf IndexDir /var/data/documents IndexFile fs-swish-e.index IndexOnly .doc .docx .pdf FuzzyIndexingMode Stemming_en1 FileFilter .pdf /usr/local/bin/swish_filter.pl FileFilter .doc /usr/local/bin/swish_filter.pl Friday, 29 October 2010

Crawling Content /usr/local/bin/swish-e -S prog -c www-swish-e.conf www-swish-e.conf IndexDir /usr/local/lib/swish-e/spider.pl IndexFile www-swish-e.index SwishProgParameters default http://phpir.com/ FuzzyIndexingMode Stemming_en1 DefaultContents HTML Friday, 29 October 2010

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 } Friday, 29 October 2010

Lucene 28 Friday, 29 October 2010

$index = Zend_Search_Lucene::create('idx'); foreach($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 29 Friday, 29 October 2010

$results = $index->find('loves bacon'); foreach($results as $result) { echo $result->score, " "; echo $result->title, "n"; } Output: 0.81656279309067 Mikko and Bacon 0.24800278854758 Marcello & Bacon Query Zend Search Lucene 30 Friday, 29 October 2010

$file = file_get_contents($url); $doc = Zend_Search_Lucene_Document_Html:: loadHTML($file); $doc->addField( Zend_Search_Lucene_Field::Text( 'url', $url ); $index->addDocument($doc) Index HTML 31 Friday, 29 October 2010

Solr http://lucene.apache.org/solr/ 32 Friday, 29 October 2010

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(); 33 Friday, 29 October 2010

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"; } 34 Friday, 29 October 2010

Xapian http://xapian.org 35 Friday, 29 October 2010

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); 36 Friday, 29 October 2010

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); 37 Friday, 29 October 2010

$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(); } 38 Friday, 29 October 2010

Improving Results 39 Friday, 29 October 2010

Anchor Text 40 Friday, 29 October 2010

Parse 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; } 41 Friday, 29 October 2010

1 2 3 Zone Weighting 42 Friday, 29 October 2010

$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); ZSL Zone Weighting 43 Friday, 29 October 2010

Document Authority 44 Friday, 29 October 2010

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); 45 Friday, 29 October 2010

Using Search 46 Friday, 29 October 2010

Summaries & Highlighting 47 Friday, 29 October 2010

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; } 48 Friday, 29 October 2010

Friday, 29 October 2010

Xapian Spelling Correction Indexer $indexer = new XapianTermGenerator(); $indexer->set_database($database); $indexer->set_flags( XapianTermGenerator::FLAG_SPELLING); Searcher $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"; 50 Friday, 29 October 2010

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] 51 Friday, 29 October 2010

Results Sorting 52 Friday, 29 October 2010

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); } 53 Friday, 29 October 2010

Faceted Search 54 Friday, 29 October 2010

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"; } 55 Friday, 29 October 2010

More Like This 56 Friday, 29 October 2010

More Like This $rset = new XapianRset(); $rset->add_document(5959); // str_replace $e = $enquire->get_eset(40, $rset); $t = $e->begin(); for($t; !$t->equals($e->end()); $t->next()){ $qs[] = new XapianQuery($t->get_term(), intval($t->get_weight())); } $query = new XapianQuery( XapianQuery::OP_OR, $qs); 57 Friday, 29 October 2010

More Like This Example php xapsim.php 1656 results found: 1: 100% docid=5959 [phpdocs/html/function.str-replace.html] 2: 47% docid=5956 [phpdocs/html/function.str-ireplace.html] 3: 24% docid=5328 [phpdocs/html/function.preg-replace.html] 4: 18% docid=5958 [phpdocs/html/function.str-repeat.html] 58 Friday, 29 October 2010

Search Performance 59 Friday, 29 October 2010

Index Updates New Docs Docs Delta Docs Docs Delta Main Main Query Main Delta Main 60 Friday, 29 October 2010

Search Speed Zend Search Lucene $index = Zend_Search_Lucene::open('index'); $index->optimize(); Sphinx indexer --merge main delta --rotate Solr $client = new SolrClient($options); $client->optimize(); Xapian xapian-compact xapindex xapindex2 61 Friday, 29 October 2010

Distributing Search Document Document Document Document Index Index Index Application 62 Friday, 29 October 2010

Large Scale Search http://www.nutch.org http://hadoop.apache.org 63 Friday, 29 October 2010

Image Credits Title http://www.flickr.com/photos/generated/2084287794/ What Do You Want http://www.flickr.com/photos/the_justified_sinner/ You Are Here 2498066986/ http://www.flickr.com/photos/alecvuijlsteke/2692475420/ Integrating Search http://www.flickr.com/photos/squeaks2569/3700355684/ Sphinx http://www.flickr.com/photos/generated/2084287794/ Lucene http://www.flickr.com/photos/mypanda/7731447/ Swish-e http://www.flickr.com/photos/ryan_fung/2239687100/ Solr http://www.flickr.com/photos/m-j-s/2724756177/ Xapian http://www.flickr.com/photos/olibac/3522056495/ Using Search http://www.flickr.com/photos/eneas/175027945/ Improving Search http://www.flickr.com/photos/x-ray_delta_one/3928200642/ Search Performance http://www.flickr.com/photos/maisonbisson/1634408/ Large Scale Search http://www.flickr.com/photos/zedzap/3663508847/ 64 Friday, 29 October 2010

Questions? 65 Friday, 29 October 2010

Thank You! Ian Barber @ianbarber http://phpir.com ian@ibuildings.com Friday, 29 October 2010

In Search Of: Integrating Site Search (PHP Barcelona)

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