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EasyRdf is a PHP library designed to make it easy to consume and produceRDF.It was designed for use in mixed teams of experienced and inexperienced RDFdevelopers. It is written in Object Oriented PHP and has been testedextensively using PHPUnit.

After parsing EasyRdf builds up a graph of PHP objects that can then be walkedaround to get the data to be placed on the page. Dump methods are available toinspect what data is available during development.

Data is typically loaded into anEasyRdf\Graph object from source RDFdocuments, loaded from the web via HTTP. TheEasyRdf\GraphStore classsimplifies loading and saving data to a SPARQL 1.1 Graph Store.

SPARQL queries can be made over HTTP to a Triplestore using theEasyRdf\Sparql\Client class.SELECT andASK queries will return anEasyRdf\Sparql\Result object andCONSTRUCT andDESCRIBE queries will returnanEasyRdf\Graph object.

$foaf =new \EasyRdf\Graph("http://njh.me/foaf.rdf");$foaf->load();$me =$foaf->primaryTopic();echo"My name is:".$me->get('foaf:name')."\n";

The lateststable version of EasyRdf can bedownloaded from the EasyRdf website.

• EasyRdf Homepage
• API documentation
• Change Log
• Source Code
• Issue Tracker

• PHP 7.1 or higher

• API documentation written inphpdoc
• Extensive unit tests written usingphpunit
• Built-in parsers and serialisers: RDF/JSON, N-Triples, RDF/XML, Turtle
• Optional parsing support for:ARC2,rapper
• Optional support forZend\Http\Client
• No required external dependencies upon other libraries (PEAR, Zend, etc...)
• Complies with Zend Framework coding style.
• Type mapper - resources of typefoaf:Person can be mapped into PHP object of classFoaf_Person
• Support for visualisation of graphs usingGraphViz
• Comes with a number of examples

• basic.php - Basic "Hello World" type example
• basic_sparql.php - Example of making a SPARQLSELECT query
• converter.php - Convert RDF from one format to another
• dump.php - Display the contents of a graph
• foafinfo.php - Display the basic information in a FOAF document
• foafmaker.php - Construct a FOAF document with a choice of serialisations
• graph_direct.php - Example of usingEasyRdf\Graph directly withoutEasyRdf\Resource
• graphstore.php - Store and retrieve data from a SPARQL 1.1 Graph Store
• graphviz.php - GraphViz rendering example
• html_tag_helpers.php - Rails Style html tag helpers to make the EasyRdf examples simpler
• httpget.php - No RDF, just testEasyRdf\Http\Client
• open_graph_protocol.php - Extract Open Graph Protocol metadata from a webpage
• serialise.php - Basic serialisation example
• sparql_queryform.php - Form to submit SPARQL queries and display the result
• uk_postcode.php - Example of resolving UK postcodes using uk-postcodes.com
• wikidata_villages.php - Fetch and information about villages in Fife from Wikidata
• zend_framework.php - Example of usingZend\Http\Client with EasyRdf

We welcome any contributions. For further information please readCONTRIBUTING.md.

For further information about extending / hack EasyRdf please readDEVELOPER.md.

The easiest way of trying out some of the examples is to use the PHP command torun a local web server on your computer.

php -S localhost:8080 -t examples

Then open the following URL in your browser:http://localhost:8080/

The EasyRdf library and tests are licensed under theBSD-3-Clause license.The examples are in the public domain, for more information seeUNLICENSE.