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Example code of rkzack/akit

Informations about the package akit

akit — Anthropic Kit for PHP

Lightweight PHP 8.4 toolkit for building AI-powered applications with the Anthropic API.

Zero production dependencies. Uses only PHP's built-in curl and json extensions. Fully typed with PHP 8.4 features: readonly classes, enums, named arguments, and array_find.

Requirements

Installation

Copy .env.example to .env and add your key:

vendor/ is generated by Composer — keep it in .gitignore and never edit it directly. Commit composer.lock; teammates run composer install to get identical versions.

Quick Start

Usage

Single Prompt

System Prompt

Multi-turn Conversation

The Conversation class tracks message history automatically — no need to manage arrays.

Streaming

Chunks arrive as they are generated rather than waiting for the full response. Ideal for long outputs, CLI tools, or real-time web UIs.

Model Selection

Available models:

Enum constant Model ID
Model::OPUS_4_7 claude-opus-4-7
Model::SONNET_4_6 claude-sonnet-4-6 (default)
Model::HAIKU_4_5 claude-haiku-4-5-20251001

Environment-based Configuration

Manual Message Arrays (Advanced)

Global Helper Functions

Helper functions wrap the shared singleton client seeded from ANTHROPIC_API_KEY. They are the fastest way to add Claude to a script.

Function Description
akit_prompt(string $prompt, ...) Send a prompt, get back the text string
akit_stream(string $prompt, callable $onChunk, ...) Stream a response
akit_chat(array $messages, ...) Multi-message array → Response
akit_client(?string $apiKey, ?string $model) Get or create the shared Client

API Reference

Client

Method Signature Returns
prompt (string $prompt, ?string $system, ?string $model, ?int $maxTokens) Response
chat (Message[] $messages, ?string $system, ?string $model, ?int $maxTokens) Response
stream (string\|Message[] $prompt, callable $onChunk, ?string $system, ?string $model, ?int $maxTokens) void
conversation (?string $system) Conversation
config () Config

Response

Method Returns Description
text() string Primary text content
model() string Model that generated the response
stopReason() string end_turn, max_tokens, etc.
usage() array {input_tokens, output_tokens}
totalTokens() int Input + output tokens
id() string Anthropic message ID
content() array All raw content blocks
raw() array Full decoded API payload
asMessage() Message Convert to assistant Message
__toString() string Alias for text()

Conversation

Method Returns Description
say(string $message, ...) Response Send a turn, append history
messages() Message[] Full history so far
turns() int Number of user turns
reset() void Clear history (keeps system prompt)

Config

Property Type Default
apiKey string (required)
model string claude-sonnet-4-6
maxTokens int 1024
baseUrl string https://api.anthropic.com/v1
apiVersion string 2023-06-01
timeout int 30 (seconds)

Error Handling

All exceptions extend Akit\Exceptions\AkitException.

Exception HTTP Status Cause
AuthException 401 Invalid or missing API key
ApiException 4xx / 5xx Rate limit, overload, bad request, etc.

Running the Examples

Running Tests

Contributing

  1. Fork the repo and create a branch from main.
  2. Add tests for any new behaviour.
  3. Run ./vendor/bin/phpunit and ./vendor/bin/phpstan analyse before opening a PR.
  4. Keep it lightweight — no new production dependencies without strong justification.

License

MIT — see LICENSE.

All versions of akit with dependencies

PHP Build Version
Package Version
Requires php Version ^8.4
ext-curl Version *
ext-json Version *
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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