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varion/minih2core-php
=====================

Minimal educational HTTP/2 core for PHP

v0.1.0(2mo ago)00MITPHPPHP ^8.1

Since Mar 7Pushed 2mo agoCompare

[ Source](https://github.com/varionlabs/minih2core-php)[ Packagist](https://packagist.org/packages/varion/minih2core-php)[ RSS](/packages/varion-minih2core-php/feed)WikiDiscussions main Synced 1mo ago

READMEChangelogDependencies (1)Versions (2)Used By (0)

varion/minih2core-php
=====================

[](#varionminih2core-php)

`varion/minih2core-php` is a minimal educational HTTP/2 core for PHP 8.1+.

This project is intentionally small and incomplete. It is designed for learning and demo servers, not production use.

Purpose
-------

[](#purpose)

- Show how HTTP/2 frames can be encoded/decoded in a simple way.
- Provide a tiny server-side flow for one request stream and one response.
- Keep implementation readable without full RFC complexity.

Supported Frame Types (Minimal Subset)
--------------------------------------

[](#supported-frame-types-minimal-subset)

- `SETTINGS` (basic ACK handling)
- `PING` (basic ACK handling)
- `HEADERS` (request stream detection, no header decoding)
- `DATA` (request end detection, response trigger)

The frame codec itself can encode/decode generic frame envelopes (9-byte header + payload).

Unsupported Features
--------------------

[](#unsupported-features)

- Full HTTP/2 compliance
- Request header decoding (HPACK decode)
- CONTINUATION handling
- Dynamic table (HPACK)
- Huffman encoding (HPACK)
- Flow control enforcement
- Stream prioritization / multiplexing
- Multi-stream request handling (demo is single-stream)
- Production-grade validation and error handling

Server Architecture
-------------------

[](#server-architecture)

- `Frame`: immutable frame value object
- `FrameCodec`: binary frame encoder/decoder
- `HpackEncoder`: minimal response header block encoder
- `ConnectionState`: mutable per-connection state
- `FrameHandler`: tiny server-side state machine
- `ResponseBuilder`: creates `HEADERS` + `DATA` response frames

ReactPHP Example
----------------

[](#reactphp-example)

See `examples/react-http2-server.php`.

What it does:

1. Accepts a TCP connection (`h2c` prior knowledge).
2. Reads and validates the HTTP/2 client preface.
3. Sends an empty server `SETTINGS` frame.
4. Buffers incoming bytes and repeatedly calls `FrameCodec::tryDecode()`.
5. Passes each decoded frame to `FrameHandler`.
6. Encodes returned frames and writes them back.
7. Sends a single plain text response body: `hello from http/2 server\n`.
8. Closes the connection after the response.

Run example:

```
php examples/react-http2-server.php 8080
```

Test with curl:

```
curl -v --http2-prior-knowledge http://127.0.0.1:8080/
```

Client Architecture
-------------------

[](#client-architecture)

The client example is also intentionally minimal and educational.

- `ClientConnectionState`: mutable state for one connection
- `RequestBuilder`: builds one GET request HEADERS frame on stream 1
- `ClientFrameHandler`: handles SETTINGS/ACK flow and minimal response events
- `ClientConnection`: ReactPHP connection wrapper around buffer/decode/write loop

### Client Limitations

[](#client-limitations)

- client only
- HTTPS + ALPN(h2) only
- single GET request only
- one request stream only
- no response header decoding
- no HPACK decoder
- no CONTINUATION support
- no multiplexing / retries / flow-control enforcement
- small responses / demo only
- not production-ready

### Client Example Flow

[](#client-example-flow)

See `examples/http2-client.php`.

1. Parse `[--insecure] `.
2. Connect via TLS with ALPN `h2,http/1.1`.
3. Send client preface + empty SETTINGS.
4. Decode frames with `FrameCodec::tryDecode()`.
5. On server SETTINGS, send SETTINGS ACK and one GET HEADERS frame.
6. Print DATA payload bytes to STDOUT.
7. Close on END\_STREAM or GOAWAY.

###  Health Score

32

—

LowBetter than 72% of packages

Maintenance87

Actively maintained with recent releases

Popularity0

Limited adoption so far

Community6

Small or concentrated contributor base

Maturity32

Early-stage or recently created project

 Bus Factor1

Top contributor holds 100% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Unknown

Total

1

Last Release

63d ago

### Community

Maintainers

![](https://www.gravatar.com/avatar/4f41eb895541ecf23ae0a4316429c3b01872a8a2c45ecb95af81ac60461f7731?d=identicon)[masakielastic](/maintainers/masakielastic)

---

Top Contributors

[![masakielastic](https://avatars.githubusercontent.com/u/49705?v=4)](https://github.com/masakielastic "masakielastic (6 commits)")

###  Code Quality

TestsPHPUnit

### Embed Badge

![Health badge](/badges/varion-minih2core-php/health.svg)

```
[![Health](https://phpackages.com/badges/varion-minih2core-php/health.svg)](https://phpackages.com/packages/varion-minih2core-php)
```

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