While it looks that all the development tools dealing with RDF and SPARQL are pretty much Java Oriented, there are also some nice libraries and tools that can help any ‘PHP lover’ easily test and start working with simple RDF systems and query them.

I found the following article “Dead Simple: RDF and SPARQL using PHP” that uses the librdf to implement a simple storage and query it. In addition the ARC project has a nice Wiki and some tutorial on how to implement a simple storage, a SPARQL endpoint any many other aspects.