QueryPath It’s like PHP jQuery for Drupal http://querypath.org http://api.querypath.org Tuesday, August 17, 2010
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QueryPathIt’s like PHP jQuery for Drupal
http://querypath.orghttp://api.querypath.org
Tuesday, August 17, 2010
Matt ButcherMaintainer of QueryPath
Author of 6 books
Drupal developer atConsumerSearch.Com “Learning Drupal 7” will be
out in RAW this monthhttp://packtpub.com
Tuesday, August 17, 2010
Emily BrandJust completed a
GSoC QueryPath project.MA in Computer Science
IT Developer/EngineerHP
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What Is QueryPath?
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A PHP library for working with HTML, XML, and
Web services.
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Follows the jQuery interfaceas much as possible.
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Why do we need it?
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The Task
Find all <a></a>
tags who havethe ancestor
<div></div>
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The DOM API
• At least seventeen classes, each with dozens of methods.
• Complex data structure.
• Checkered history in PHP.
• VERY powerful.
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SimpleXML
• One class, about a dozen functions and methods.
• Turns XML into basic objects.
• Makes easy stuff easy, and makes everything else insanely hard.
Same size as DOMExample
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SAX / Expat
• Event based.
• Write your own parser handler.
• One per XML format.
• Only reliable “legacy” library.
Same size,fewer features
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QueryPath
• Compact library.
• Functions are short and mnemonic.
• The power of DOM, but simpler than SimpleXML
• (Shhh... don’t tell, but it’s built on the DOM.)
[This space intentionally left blank ]
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Lots of Features,One function.
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• Open XML/HTML file: qp(‘somefile.xml’);
• Parse string: qp(‘<html>...</html>’);
• Get URL: qp(‘http://drupal.org');
• Use DOM or SimpleXML object: qp($ele);
Files, strings, objects...
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Search with CSS
qp($rss_url, ‘item > title’);
<?xml version="1.0" encoding="utf-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" version="2.0" xml:base="http://technosophos.com"> <channel> <title>TechnoSophos</title> <link>http://technosophos.com</link> <item> <title> Drupal Dojo: "QueryPath" </title> <link>http://technosophos.com/content/...</link> <description> On August 17th at 12pm EDT (9AM PDT)... </description> </item> </channel></rss>
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Chaining (Fluent API)
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$qp = new QueryPath(‘my.xml’);$qp->find(‘root’);$qp->append(‘<p>Hi.</p>’)
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qp(‘my.xml’, ‘root’)->append(‘<p>Hi.</p>’);
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Some Things it Does• Import/Scrape HTML
• Read XML files
• Remote web services
• SVG image manipulation
• RSS or Atom feeds
• Retrieve database data into XML/HTML
• Work with RDFa
• Run SPARQL queries on Semantic Web
• Generate XML
• Transform using XSLT
• Interact with RDBMS
• And more...
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QueryPath and Drupal
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Myth“QueryPath is for Drupal”
QueryPath is a PHP library, and will work with any PHP tool.*
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FactThe QueryPath Drupal modules
provides all you need.
You can easily use QueryPath within Drupal.
http://drupal.org/project/querypath
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What’s Been Done with QueryPath?
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Honestly, I can’t keep track anymore.But here are a few examples.
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QueryPath 2.1
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Better HTMLUse
htmlqp() to parse HTML.
Six lines ofcode to grab
headlines fromd.o
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jQuery 1.4 Features• attach & detach
• has
• even & odd
• first & last
• firstChild & lastChild
• nextUntil, prevUntil & parentsUntil
• More...
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Tons of new documentation and examples.
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New Logo
Designed by Michael Mesker
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And the Drupal module...
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Drupal 7 version is DONE!
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Demos
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• Stable: QueryPath 2.0.1http://querypath.org
• Development: QueryPath 2.1http://github.com/technosophos/querypath
• Drupal modules at http://drupal.org/project/querypath
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