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GoodRelations for PHP (GR4PHP) - A PHP API for Consuming GoodRelations E-commerce Data

GR4PHP is a PHP API (as library) that allows the consumption of GoodRelations data on an eligible SPARQL endpoint without requiring the developer to have a deep understanding of the underlying GoodRelations vocabulary or SPARQL queries. The API provides six abstract functions, which are interally translated into proper SPARQL queries for GoodRelations.

  • getCompany: Returns information about a GoodRelations BusinessEntity.
  • getLocation: Return stores in the proximity of a given geographic point.
  • getOffers: Returns GoodRelations Offerings given search criteria.
  • getOpeningHours: Gives opening hours to a given store (GoodRelations LocationOfSalesOrServiceProvisioning).
  • getProductModel: Returns details about model data (GoodRelations ProductOrServiceModel).
  • getStore: Gives response data to a SPARQL query searching for GoodRelations LocationOfSalesOrServiceProvisioning.

Benefits of GR4PHP

PHP developers do not need to be fully aware of all details of GoodRelations, RDF, or SPARQL and can easily integrate GoodRelations e-commerce data, like offers, product features, or store information into their Web applications.

Demo and Documentation

For demo and documentation take a look at

How to start developing with GR4PHP?

After downloading and including the GR4PHP package into your project directory, you can pick one of the GR4PHP libary functions (see the list above). GR4PHP automatically crafts a SPARQL query for you, submits it to the configured SPARQL endpoint, fetches the results and converts them into a PHP array, on which further processing can be conducted.

The figure below sketches a flow chart of GR4PHP:

Flow Chart of GR4PHP


Stolz, A., Ge, M. and Hepp, M.: GR4PHP: A Programming API for Consuming E-Commerce Data from the Semantic Web. Proceedings of the First Workshop on Programming the Semantic Web (PSW 2012), in conjunction with the 11th International Semantic Web Conference (ISWC 2012) (Boston, Mass., USA, 2012). (Slides)


GR4PHP is available under the terms of the GNU Lesser General Public License. The work on this project has been supported by the German Federal Ministry of Research (BMBF) by a grant under the KMU Innovativ program as part of the Intelligent Match project (FKZ 01IS10022B).


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