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Example code of sferra/delta

Informations about the package delta

Delta

OpenAI-compatible SSE streaming client for PHP / Laravel.

Stream AI responses token-by-token via a clean, fluent API. Works with any provider that exposes a /chat/completions endpoint.

Installation

Laravel will auto-discover the service provider. No manual registration needed.

Configuration

Publish the config file (optional):

Or use environment variables:

Usage

Facade (Laravel)

Direct client

Cancelling an in-flight stream

Pass a shouldCancel closure as the third argument. It is checked before every byte read, so the stream aborts almost instantly when it returns true. The partial content accumulated up to that point is returned.

Typical use case: a chat UI that needs to interrupt the AI when the user clicks a "stop" button. In Livewire, point a public property at the flag and bind the button with wire:click:

Supported Providers

Any OpenAI-compatible API:

How It Works

Delta sends a POST request with stream: true and parses the SSE (Server-Sent Events) response byte-by-byte, extracting choices[0].delta.content from each chunk.

The $onChunk callback receives each text delta as it arrives, enabling real-time streaming in Livewire components, console commands, or any PHP application.

License

MIT

All versions of delta with dependencies

PHP Build Version
Package Version
Requires php Version ^8.2
illuminate/support Version ^11.0|^12.0|^13.0
illuminate/http Version ^11.0|^12.0|^13.0
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