In Search Of: Integrating Site Search (PHP Barcelona)

In Search Of...

Ian Barber@ianbarber

http://phpir.comian@ibuildings.com

integrating site search

Friday, 29 October 2010

How Search WorksIntegrating SearchImproving Results

Using SearchSearch Performance

Questions

3Friday, 29 October 2010

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 SearchFriday, 29 October 2010

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');

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 WeightingFriday, 29 October 2010

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 (PHP Barcelona)

Documents

Varnish4 php Barcelona

Eric Redmond – Distributed Search on Riak 2.0 - NoSQL matters Barcelona 2014

Search Congress Barcelona 2009 Steak V2

PHP 7 – What changed internally? (PHP Barcelona 2015)

PHP Barcelona Monthly Talk Feb 2015

Job search resources - Barcelona Treball · 2020-02-19 · Job search resources / General Report 7 02. Recruitment companies and intermediaries List of companies and intermediary

PHP Source Code Search with PHP

1 Open Source Programming. -Introduction to PHP -PHP installation /wamp server installation for PHP environment -PHP syntax -PHP variables -PHP Strings

Use PHP to build a search engine optimization app, Part 1 ... · PDF fileThis series creates a search engine optimization application that connects to search engines to obtain client

Distribute the workload, PHP Barcelona 2011

COMP519: Web Programming Autumn 2010 PHP Basics: Introduction to PHP a PHP file, PHP workings, running PHP. Basic PHP syntax variables, operators,

TO THE RANDOM WALK - Universitat de Barcelona - Home · TO THE RANDOM WALK Daniel Campos (Universitat Autònoma de Barcelona) 1. Introduction (Random search theory: applications and

Guidebook #4 – PHP · Using PHP in WordPress Typically, you can't use PHP coding like that within WordPress post/page content. However, if you search for and install a free plugin

Search and update Google Base with PHP

Posicionamiento Internacional en Buscadores - Fernando Maciá - Search Congress Barcelona 2009

Doctrine 2 - PHP Barcelona

CCS 4370/6370: Web Programming Spring 2013 PHP Basics: Introduction to PHP a PHP file, PHP workings, running PHP. Basic PHP syntax variables, operators,

ECTS (2011-2012 // OBS Universitat de Barcelona). (2009 ...• Posgrado en Search y Social Media Marketing con una dedicación de 20 ECTS (2009-2010 // OBS Universitat de Barcelona)

Adaptive Marketing Post-Transactionagportal-s3bucket.s3.amazonaws.com/uploadedfiles/...Windows Internet Explorer com\purchase php Tools Help View Favorites Search by phone, Phone Search,

Use PHP to build a search engine optimization app, Part 1 ... · Use PHP to build a search engine optimization app, Part 1: Getting started Track your SEO efforts with PHP, Derby,