Imagen 4 PHP SDK for RunAPI

The Imagen 4 PHP SDK is the language-specific package for Imagen 4 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 imagen-4-php split repository. For model details, use https://runapi.ai/models/imagen-4; for API reference, use https://runapi.ai/docs/api/imagen-4/text-to-image; for SDK docs, use https://runapi.ai/docs/resources/sdks.

Install

composer require runapi-ai/imagen-4

Quick start

<?php

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

use RunApi\Imagen4\Imagen4Client;

$client = new Imagen4Client(); // reads RUNAPI_API_KEY

$remixImageTask = $client->remixImage->create([
    'model' => 'imagen-4-pro-remix-image',
    'aspect_ratio' => '1:1',
    'output_format' => 'png',
    'output_resolution' => '1k',
    'prompt' => 'Make it golden hour',
    'source_image_urls' => ['https://cdn.runapi.ai/public/samples/image.jpg'],
]);

$task = $client->textToImage->create([
    'model' => 'imagen-4',
    'aspect_ratio' => '1:1',
    'negative_prompt' => 'sample',
    'prompt' => 'A precise product render on white marble',
    'seed' => 1,
]);

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

$result = $client->textToImage->run([
    'model' => 'imagen-4',
    'aspect_ratio' => '1:1',
    'negative_prompt' => 'sample',
    'prompt' => 'A serene mountain lake at dawn',
    'seed' => 1,
]);

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/imagen-4
• SDK docs: https://runapi.ai/docs/resources/sdks
• Product docs: https://runapi.ai/docs/api/imagen-4/text-to-image
• Pricing and rate limits: https://runapi.ai/models/imagen-4/imagen-4
• Full catalog: https://runapi.ai/models
• GitHub repository: https://github.com/runapi-ai/imagen-4-php
• Multi-language SDK repository: https://github.com/runapi-ai/imagen-4-sdk

License

Licensed under the Apache License, Version 2.0.