Implement Server-Sent Events per the WHATWG / RFC 8895 spec.
Scope
text/event-stream response mode with chunked / HTTP-2 framing.- Public PHP API for emitting events:
id, event, data, retry fields.
- Automatic flush on each event; integration with the response writer's backpressure.
- Heartbeat / keep-alive comments to prevent intermediary timeouts.
- Last-Event-ID resume header surfaced on the request.
- Works over HTTP/1.1, HTTP/2, and HTTP/3.
- PHPT tests covering reconnection, ID propagation, and backpressure.
Acceptance
- Browser EventSource clients connect and receive events end-to-end.
- No buffering between PHP
send() and the wire under load.
Implement Server-Sent Events per the WHATWG / RFC 8895 spec.
Scope
text/event-streamresponse mode with chunked / HTTP-2 framing.id,event,data,retryfields.Acceptance
send()and the wire under load.