JSON-LD Processor for PHP

 JsonLD is a fully conforming JSON-LD processor written in PHP. It is
 extensively tested and passes the official JSON-LD test suite.
 .
 Additionally to the features defined by the JSON-LD API specification,
 JsonLD supports framing (including value matching, deep-filtering,
 aggressive re-embedding, and named graphs) and an experimental
 object-oriented interface for JSON-LD documents.