README

DIAL AI Chat Completion Task implemented in PHP. A command line chat application that communicates with the DIAL AI API.

API specification: https://dialx.ai/dial_api

Install

composer require distvan/dialclient

Basic usage (sync)

DialChatCompletions::create() returns a Message (role + content).

<?php

use DialClient\Dial\DialChatCompletions;
use DialClient\Http\GuzzleClient;

$client = new GuzzleClient(
    baseUri: 'https://your-dial-host.example',
    apiKey: null, // (optional) sets Authorization: Bearer ...
);

$chat = new DialChatCompletions(
    client: $client,
    deploymentName: 'your-deployment',
    apiKeyHeaderValue: null, // (optional) sets `api-key: ...`
);

// Alternatively, omit deploymentName and pass it in the payload as `deployment_name` or `deployment`.

$message = $chat->create([
    'messages' => [
        ['role' => 'user', 'content' => 'Hello!'],
    ],
]);

echo $message->content;

Local env vars (scripts)

If you want to run the included app.php locally, you can set the required environment variables using the scripts in ./scripts.

The CLI expects:

DIAL_BASE_URI (required)
DIAL_DEPLOYMENT (required)
DIAL_API_KEY (optional; sent as api-key header)
DIAL_CA_BUNDLE (optional; used as Guzzle verify path)

DIAL_API_KEY (if set) is sent as an api-key header by app.php via DialChatCompletions.

Note: app.php currently runs the CLI in streaming mode ($app->run(true)), but it prints the final assembled answer (not token-by-token).

Bash / Git Bash

source ./scripts/dial-env.sh
php ./app.php

PowerShell

. .\scripts\dial-env.ps1
php .\app.php

Run the CLI chat example

This repo includes a tiny interactive CLI chat in app.php (backed by DialClient\Application).

Pass an optional system_prompt as the first argument.
Type exit to quit.

PowerShell

composer install
. .\scripts\dial-env.ps1
php .\app.php

# With an explicit system prompt:
php .\app.php "You are a helpful assistant."

# Help:
php .\app.php --help

Bash / Git Bash

composer install
source ./scripts/dial-env.sh
php ./app.php

# With an explicit system prompt:
php ./app.php "You are a helpful assistant."

# Help:
php ./app.php --help

SSL / cURL error 60 (Windows)

If you see cURL error 60: SSL certificate problem: unable to get local issuer certificate, PHP/cURL can't validate the certificate chain.

Preferred fix: set DIAL_CA_BUNDLE to the path of a PEM CA bundle (or your corporate root/intermediate CA in PEM format). Example:

$env:DIAL_CA_BUNDLE = (Resolve-Path .\scripts\cacert.pem).Path

Async

createAsync() returns a Promise that resolves to the decoded JSON array returned by the server.

$promise = $chat->createAsync(['model' => 'your-model', 'messages' => []]);
$promise->then(function (array $result): void {
    // handle result
});

Streaming

The API streams SSE events (data: ...) where each JSON chunk contains choices[0].delta (partial output). The stream ends with data: [DONE].

In many deployments, early chunks may contain only role/metadata and no delta.content, and finish_reason stays null until the final chunk.

To print tokens/fragments as they arrive:

foreach ($chat->streamText(['messages' => []]) as $delta) {
    echo $delta;
}

If you need access to the full decoded chunks:

foreach ($chat->streamChunks(['messages' => []]) as $chunk) {
    // $chunk is the decoded JSON array for one SSE event
}

If you just want the final assembled message content:

$message = $chat->stream(['messages' => []]);
echo $message->content;

Xdebug step-debug noise (CLI)

If you see Xdebug: [Step Debug] Time-out connecting to debugging client ... when running composer test / composer phpstan, disable step-debug for the Composer process:

$env:XDEBUG_MODE = 'off'
composer test

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