[GLD Serializer Benchmark] PHP json 8.3.19 — spec compliance misses

Hi — this is a friendly report from the GLD Serializer Benchmark, an independent multi-language suite that times serializers and checks them against the published format specs (RFC 8259, YAML 1.2, …).

We measured json 8.3.19 on PHP. The suite recorded spec-profile misses for this pin. The catalog is report-only: a miss is not a CI failure, and some cases are older or stricter profiles (for example RFC 4627 vs RFC 8259) rather than a crash.

Compliance results (please start here)

This link opens the live heatmap on PHP with json already selected (All standards). Click a scored cell for each FAIL and the cited spec paragraph:

https://leo-gan.github.io/GLD.SerializerBenchmark/dashboard/#compliance/php/json

How the catalog is built, and how to read a FAIL line:

• https://leo-gan.github.io/GLD.SerializerBenchmark/compliance/
• https://leo-gan.github.io/GLD.SerializerBenchmark/compliance/reading-results/

I am not pasting the case list here so you can use the Dashboard (filters, heatmap, and spec links) rather than a static dump.

Optional: one standard family only — #compliance/php/json/json (or yaml, cbor, …).

Benchmark timings (same pin)

The same suite also publishes encode / decode time and payload size for this library on PHP:

https://leo-gan.github.io/GLD.SerializerBenchmark/dashboard/?lang=php&data=document@n=1&mode=bytes#dashboard

Details table (this library pre-selected):

https://leo-gan.github.io/GLD.SerializerBenchmark/dashboard/?lang=php&ser=json&data=document@n=1&mode=bytes#detailed-analytics

That page is the live L1 snapshot, not a claim that one library is “best.”

Ask

Please look at the Compliance view for json. If a miss is a real decoder/encoder bug you want to fix, great. If it is an intentional default (accepting NaN, YAML 1.1 bools, …), a short note here is enough — we will keep the catalog as-is unless the library’s documented contract changes.

Thanks for the library.

Start with the GLD Serializer Benchmark compliance dashboard for PHP json, then open each scored FAIL and read its cited specification paragraph. Reproduce the reported encoder or decoder behavior and determine whether each miss is a real bug or an intentional documented default; done means the issue is fixed with appropriate coverage or clearly documented as intentional.