🧠 Gemini PHP SDK for Google Generative AI

A Laravel-friendly, lightweight PHP SDK to interact with Google Gemini Generative AI. Supports text generation, image input (vision), and is fully customizable for any PHP project.

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✨ Features

• ✅ Gemini text generation (prompt → response)
• 🖼️ Image input support (base64 vision models)
• 🔐 Full OAuth2 authentication (refresh token supported)
• 🔧 Easy configuration via .env or constructor
• 🧪 PHPUnit + Testbench testing support
• 🎯 Laravel-ready (service provider + facade)
• 📦 Composer installable
• 📘 Full documentation included

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🧪 Installation

Install via Composer:

composer require php-gemini/generative-ai

⚙️ Configuration

For Laravel users, publish the configuration file:

php artisan vendor:publish --provider="PhpGemini\GenerativeAI\Providers\GeminiServiceProvider"

Then update your .env file with your API Key:

GEMINI_API_KEY=your_actual_api_key
GEMINI_MODEL=gemini-1.5-flash

🔐 Using OAuth2? See the section below on generating and using refresh tokens instead.

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🔐 OAuth2 Support

This SDK supports Google OAuth2 access via a refresh_token, client_id, and client_secret.

🔧 Generate Refresh Token

To generate your credentials securely, use our standalone command-line script: Zero-Asif/oauth2_refresh_token_generator

Follow the instructions in its README file. After running the script, add the output to your .env file:

GEMINI_OAUTH_CLIENT_ID=your_client_id
GEMINI_OAUTH_CLIENT_SECRET=your_client_secret
GEMINI_OAUTH_REFRESH_TOKEN=your_refresh_token

✅ The SDK will automatically use OAuth2 if an API key is not provided.

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🚀 Usage

✅ In Laravel

use Gemini;

echo Gemini::generate("What's the future of AI?");

✅ In Plain PHP

Initialize with an API Key:

use PhpGemini\GenerativeAI\GeminiClient;

require 'vendor/autoload.php';

$gemini = new GeminiClient([
    'api_key' => 'your_api_key',
    'model' => 'gemini-1.5-flash',
]);

echo $gemini->generateContent("Tell me something interesting.");

Or initialize with OAuth2:

use PhpGemini\GenerativeAI\GeminiClient;
use PhpGemini\GenerativeAI\Services\OAuth2Service;

require 'vendor/autoload.php';

$oauth = new OAuth2Service([
    'client_id' => 'your_client_id',
    'client_secret' => 'your_client_secret',
    'refresh_token' => 'your_refresh_token',
]);

$gemini = new GeminiClient([
    'model' => 'gemini-1.5-flash',
    'oauth2' => $oauth
]);

echo $gemini->generateContent("Tell me something interesting.");

🖼️ Image Input (Vision Model)

$response = $gemini->generateContentWithImage('path/to/image.jpg', 'What’s in this image?');

⚠️ Note: Only supported for models that accept image input, like gemini-1.5-flash.

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🧪 Testing (PHPUnit)

To run the test suite:

composer test

To use Testbench for testing within a Laravel application, first install it:

composer require --dev orchestra/testbench

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🛠️ Roadmap

• Text generation
• Laravel integration
• Image input (vision support)
• OAuth2 integration (refresh token support)
• Unit testing & mocking (PHPUnit + Testbench)
• Streaming response support
• Online documentation site (mkdocs)

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📘 Documentation

Full documentation is available inside: docs/index.md

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🤝 Contributing

Pull requests, issues, and feature suggestions are welcome!

git clone [https://github.com/php-gemini/generative-ai.git](https://github.com/php-gemini/generative-ai.git)
cd generative-ai
composer install

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📄 License

This project is open-sourced under the MIT License.

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🔗 Useful Links

• Packagist: php-gemini/generative-ai
• Gemini API Docs: https://ai.google.dev
• OAuth2 Refresh Token Tool: Zero-Asif/oauth2_refresh_token_generator
• Google Cloud Console (OAuth Credentials): https://console.cloud.google.com/apis/credentials
• Project Homepage: https://github.com/php-gemini/generative-ai

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🙋 Author

Zero-Asif (Asifuzzaman Asif)

• 📧 Email: asifuzzamanasif0001@gmail.com
• 🔗 GitHub: github.com/Zero-Asif

✨ If this project helped you, please ⭐ the repo!