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Informations about the package php-json-ld

PHP-JSON-LD

A PHP implementation of the JSON-LD 1.1 specification.

PHP-JSON-LD implements all six JSON-LD 1.1 processing algorithms — Expansion, Compaction, Flattening, Serialize to RDF (toRdf), RDF to JSON-LD (fromRdf), and Framing — validated against the official W3C test suites (1,287 of 1,302 tests passing, with Compaction and Flattening fully conformant) and cross-checked against reference implementations for identical canonical RDF output. The public API is stable and the project follows Semantic Versioning.

Highlights

Installation

Requires PHP 8.2+. The bundled HttpDocumentLoader needs a PSR-18 HTTP client and PSR-17 request factory (e.g. guzzlehttp/guzzle + guzzlehttp/psr7); alternatively, implement Accredify\JsonLd\Contracts\DocumentLoader yourself and no HTTP client is required.

Usage

To serve known contexts from local files (recommended for verifiable credentials), implement Accredify\JsonLd\Contracts\DocumentLoader. See tests/Interop/Support/FixtureDocumentLoader.php for a compact example.

Framing note: a frame's {} wildcard cannot be represented in PHP's associative-array model (it decodes identically to []), so the framing API treats an empty frame value as match none and accepts the documented Expansion::FRAME_WILDCARD sentinel for a wildcard.

Conformance

The package is tested against the official W3C JSON-LD 1.1 test suite (git submodule at tests/w3c/; harness documented in tests/W3c/README.md).

Algorithm Spec W3C suite Passing Conformance
Expansion §5.5 385 381 4 documented blockers
Compaction §5.6 246 246 100%
Serialize to RDF (toRdf) §7 467 463 4 documented blockers
Flattening §4.6 58 58 100%
RDF to JSON-LD (fromRdf) §4.9 54 50 4 documented blockers
Framing framing §4 92 89 3 documented blockers

Totals: 1,287 / 1,302 passing. The 15 residual non-conformances are negative-test, non-normative, or environment limits, carried as an explicit expected-failure allowlist (tests/W3c/KnownBlockers.php) that gates CI in both directions — a new regression fails the build, and so does a listed blocker that starts passing:

Implementation report

A W3C EARL implementation report is generated for each release and submitted to the JSON-LD 1.1 implementation report. To regenerate it:

Tests marked specVersion: json-ld-1.0 are excluded from the report, matching the consolidated report's JSON-LD 1.1 scope.

Interoperability

The W3C suite alone cannot catch a processor that is consistently wrong: internal sign/verify round-trips recompute the same dataset on both sides, and a divergence only surfaces when another implementation checks the signature. tests/Interop closes that gap with realistic VC 2.0 and Open Badges v3 documents whose RDFC-1.0 canonical N-Quads — the exact bytes an eddsa-rdfc-2022 proof is computed over — are pinned to goldens generated by jsonld.js and compared as datasets on every CI run.

Development notes

tests/Algorithms/Characterization/ holds JSON snapshots of the expander's output over sample verifiable-credential documents. They are not a spec-conformance reference; they pin behaviour so any change to expansion output lands as a reviewable diff, to be paired with matching updates in downstream consumers (e.g. signed-credential fixtures).

License

MIT © Accredify

All versions of php-json-ld with dependencies

PHP Build Version
Package Version
Requires php Version ^8.2
psr/http-client Version ^1.0
psr/http-factory Version ^1.0
psr/http-message Version ^1.1 || ^2.0
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