Purtle

Purtle is a fast streaming RDF serialization library for PHP. It was developed by Wikimedia Germany for use with Wikibase.

Purtle can be loaded via Composer. See the packagist page here: https://packagist.org/packages/wikimedia/purtle. It is currently maintained on github, but it's expected to be moved to gerrit soon. The git repository can be found at https://github.com/wmde/purtle.