Flux PHP SDK for RunAPI

The Flux PHP SDK is the language-specific package for Flux on RunAPI. Use this package when your application needs Composer installs, associative-array request bodies, task status lookup, and consistent RunAPI errors in PHP.

This README is the PHP package guide for the public flux-php split repository. For model details, use https://runapi.ai/models/flux; for API reference, use https://runapi.ai/docs/api/flux/text-to-image; for SDK docs, use https://runapi.ai/docs/resources/sdks.

Install

composer require runapi-ai/flux

Quick start

<?php

require __DIR__ . "/vendor/autoload.php";

use RunApi\Flux\FluxClient;

$client = new FluxClient(); // reads RUNAPI_API_KEY

$task = $client->textToImage->create([
    'model' => 'flux-2-klein',
    'aspect_ratio' => '1:1',
    'output_count' => 1,
    'prompt' => 'A precise product render on white marble',
]);

$status = $client->textToImage->get($task->id);

$remix = $client->remixImage->create([
    'model' => 'flux-pro',
    'prompt' => 'Turn this product shot into a warm editorial photo',
    'source_image_url' => 'https://cdn.runapi.ai/public/samples/image.jpg',
    'aspect_ratio' => '1:1',
    'output_count' => 1,
]);

$result = $client->textToImage->run([
    'model' => 'flux-2-klein',
    'aspect_ratio' => '1:1',
    'output_count' => 1,
    'prompt' => 'A serene mountain lake at dawn',
]);

echo $result->images[0]->url . PHP_EOL;

Use create() to submit a task and return quickly, get() to fetch the latest task state, and run() when a script should create and poll until completion. In web request handlers, prefer create() plus webhook or later get() polling so a worker is not held open.

RunAPI-generated file URLs are temporary. Download and store generated files in your own durable storage within the retention window; do not treat returned URLs as long-term assets.

Language notes

Pass request parameters as associative arrays with snake_case keys. The available resources are textToImage, remixImage. Keep RUNAPI_API_KEY in the environment or your secret manager; never commit API keys or callback secrets.

Links

• Model page: https://runapi.ai/models/flux
• SDK docs: https://runapi.ai/docs/resources/sdks
• Product docs: https://runapi.ai/docs/api/flux/text-to-image
• Pricing and rate limits: https://runapi.ai/models/flux/dev
• Full catalog: https://runapi.ai/models
• GitHub repository: https://github.com/runapi-ai/flux-php
• Multi-language SDK repository: https://github.com/runapi-ai/flux-sdk

License

Licensed under the Apache License, Version 2.0.