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[HTTP & Networking](/categories/http) 4. / 5. eliashaeussler/sse ActiveLibrary[HTTP & Networking](/categories/http) eliashaeussler/sse ================== PHP implementation of server-sent events using event streams 2.0.0(6mo ago)8340.1k↓19.8%[1 issues](https://github.com/eliashaeussler/sse/issues)2GPL-3.0-or-laterPHPPHP ~8.2.0 || ~8.3.0 || ~8.4.0 || ~8.5.0CI passing Since Jun 15Pushed 1mo ago1 watchersCompare [ Source](https://github.com/eliashaeussler/sse)[ Packagist](https://packagist.org/packages/eliashaeussler/sse)[ RSS](/packages/eliashaeussler-sse/feed)WikiDiscussions main Synced 1mo ago READMEChangelog (5)Dependencies (13)Versions (7)Used By (2) [![Screenshot](docs/code-example.png)](#-installation) Server-Sent Events in PHP ========================= [](#server-sent-events-in-php) [![Coverage](https://camo.githubusercontent.com/336ec3a7b42361de5c74c1806db264d6c7dac3717d4de28f90c5ab09a3ffe3ad/68747470733a2f2f696d672e736869656c64732e696f2f636f766572616c6c73436f7665726167652f6769746875622f656c6961736861657573736c65722f7373653f6c6f676f3d636f766572616c6c73)](https://coveralls.io/github/eliashaeussler/sse)[![CGL](https://camo.githubusercontent.com/48bf41488cb063d41a0c592c47d453396f3ba8dae5b3b12173acf9a868c30e99/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f616374696f6e732f776f726b666c6f772f7374617475732f656c6961736861657573736c65722f7373652f63676c2e79616d6c3f6c6162656c3d63676c266c6f676f3d676974687562)](https://github.com/eliashaeussler/sse/actions/workflows/cgl.yaml)[![Tests](https://camo.githubusercontent.com/042f267cbf03f8960556d4d90c0b6a4df4fa0cb80d39e30a673df4fee71ac304/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f616374696f6e732f776f726b666c6f772f7374617475732f656c6961736861657573736c65722f7373652f74657374732e79616d6c3f6c6162656c3d7465737473266c6f676f3d676974687562)](https://github.com/eliashaeussler/sse/actions/workflows/tests.yaml)[![Supported PHP Versions](https://camo.githubusercontent.com/5ed88814172c0c3265ff61127c56766be86894b611c1bf6b23480cd96c53ce30/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f646570656e64656e63792d762f656c6961736861657573736c65722f7373652f7068703f6c6f676f3d706870)](https://packagist.org/packages/eliashaeussler/sse) A server implementation of [server-sent events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events), written in PHP. It can be used to stream events back to the client. All event-driven features are highly customizable, even custom emitters can be used. The library also provides a PSR-7 compliant event stream implementation. 🚀 Features ---------- [](#-features) - Server implementation of [server-sent events (SSE)](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events) - Highly customizable via interface implementations - Self-emitting event stream - PSR-7 compliant event stream 🔥 Installation -------------- [](#-installation) [![Packagist](https://camo.githubusercontent.com/b939215eb8192a74a7de9cb189a480c4820b24d1015e147004121429528f16b3/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f762f656c6961736861657573736c65722f7373653f6c6162656c3d76657273696f6e266c6f676f3d7061636b6167697374)](https://packagist.org/packages/eliashaeussler/sse)[![Packagist Downloads](https://camo.githubusercontent.com/f639ef1e8ddb74720098a943152dfe25fddfb913ad6129467a19465d667b2edc/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f64742f656c6961736861657573736c65722f7373653f636f6c6f723d627269676874677265656e)](https://packagist.org/packages/eliashaeussler/sse) ``` composer require eliashaeussler/sse ``` ⚡ Usage ------- [](#-usage) ``` use EliasHaeussler\SSE; // Open event stream $eventStream = SSE\Stream\SelfEmittingEventStream::create(); $eventStream->open(); // Send event $eventStream->sendEvent(new MyCustomEvent($eventData)); // Send message $eventStream->sendMessage('myCustomEvent', $eventData); // Close event stream $eventStream->close(); ``` 🎢 Architecture -------------- [](#-architecture) ### Event stream [](#event-stream) All events are sent through [event streams](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events#sending_events_from_the_server). The library provides an interface [`Stream\EventStream`](src/Stream/EventStream.php) that abstracts all stream parts during the whole event streaming progress. The following event stream implementations are currently available: - [**`Stream\SelfEmittingEventStream`**](src/Stream/SelfEmittingEventStream.php)sends all stream data to an [emitter](#emitter) that takes care of writing data into an active resource. This is the best working solution in most cases. - [**`Stream\Psr7EventStream`**](src/Stream/Psr7EventStream.php) creates a PSR-7 compliant response during the whole event streaming progress. Note that this response is not emitted on real time. ### Emitter [](#emitter) All data of a self-emitting event stream is handed over to a given emitter. The library provides an interface [`Stream\Emitter\Emitter`](src/Stream/Emitter/Emitter.php)that takes care of all passed data. The following emitter implementations are currently available: - [**`Stream\Emitter\RealtimeEmitter`**](src/Stream/Emitter/RealtimeEmitter.php)writes all stream data directly to the active standard output. ### Event [](#event) There are two ways how data can be sent through an active event stream: 1. By sending a prebuilt event by calling `Stream\EventStream::sendEvent()`. 2. By sending a plain message by calling `Stream\EventStream::sendMessage()`. Events can be generated by implementing the [`Event\Event`](src/Event/Event.php)interface. Each event must provide an event name and JSON-serializable event data. 🧑‍💻 Contributing ---------------- [](#‍-contributing) Please have a look at [`CONTRIBUTING.md`](CONTRIBUTING.md). ⭐ License --------- [](#-license) This project is licensed under [GNU General Public License 3.0 (or later)](LICENSE). ### Health Score 54 — FairBetter than 97% of packages Maintenance79 Regular maintenance activity Popularity41 Moderate usage in the ecosystem Community15 Small or concentrated contributor base Maturity66 Established project with proven stability Bus Factor1 Top contributor holds 82.6% 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 Every ~221 days Total 5 Last Release 181d ago Major Versions 1.1.1 → 2.0.02025-11-18 PHP version history (4 changes)1.0.0PHP ~8.1.0 || ~8.2.0 1.1.0PHP ~8.1.0 || ~8.2.0 || ~8.3.0 1.1.1PHP ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0 2.0.0PHP ~8.2.0 || ~8.3.0 || ~8.4.0 || ~8.5.0 ### Community Maintainers ![](https://www.gravatar.com/avatar/144cefe55242b883c87cb537463f3ba75a0f8198fc5b602b50c838aae31fe7ee?d=identicon)[eliashaeussler](/maintainers/eliashaeussler) --- Top Contributors [![renovate[bot]](https://avatars.githubusercontent.com/in/2740?v=4)](https://github.com/renovate[bot] "renovate[bot] (418 commits)")[![eliashaeussler](https://avatars.githubusercontent.com/u/16313625?v=4)](https://github.com/eliashaeussler "eliashaeussler (88 commits)") --- Tags event-sourceevent-streamsse ### Code Quality TestsPHPUnit ### Embed Badge ![Health badge](/badges/eliashaeussler-sse/health.svg) ``` [![Health](https://phpackages.com/badges/eliashaeussler-sse/health.svg)](https://phpackages.com/packages/eliashaeussler-sse) ``` ### Alternatives [guzzlehttp/psr7 PSR-7 message implementation that also provides common utility methods 7.9k1.0B3.2k](/packages/guzzlehttp-psr7)[phpro/http-tools HTTP tools for developing more consistent HTTP implementations. 28137.8k](/packages/phpro-http-tools)[friendsofsymfony/http-cache Tools to manage HTTP caching proxies with PHP 36114.7M36](/packages/friendsofsymfony-http-cache)[laudis/neo4j-php-client Neo4j-PHP-Client is the most advanced PHP Client for Neo4j 184616.9k31](/packages/laudis-neo4j-php-client)[spiral/roadrunner-http RoadRunner: HTTP and PSR-7 worker 799.2M48](/packages/spiral-roadrunner-http)[php-soap/psr18-transport PSR-18 HTTP Client transport for SOAP 183.4M20](/packages/php-soap-psr18-transport) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)