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<p align="center"> <img src="https://raw.githubusercontent.com/gemini-api-php/client/main/assets/example.png" width="800" alt="Gemini API PHP Client - Example"> </p> <p align="center"> <a href="https://packagist.org/packages/gemini-api-php/client"><img alt="Total Downloads" src="https://img.shields.io/packagist/dt/gemini-api-php/client"></a> <a href="https://packagist.org/packages/gemini-api-php/client"><img alt="Latest Version" src="https://img.shields.io/packagist/v/gemini-api-php/client"></a> <a href="https://packagist.org/packages/gemini-api-php/client"><img alt="License" src="https://img.shields.io/github/license/gemini-api-php/client"></a> </p>Gemini API PHP Client
Gemini API PHP Client allows you to use the Google's generative AI models, like Gemini Pro and Gemini Pro Vision.
This library is not developed or endorsed by Google.
- Erdem Köse - github.com/erdemkose
Table of Contents
- Installation
- How to use
Installation
You need an API key to gain access to Google's Gemini API. Visit Google AI Studio to get an API key.
First step is to install the Gemini API PHP client with Composer.
composer require gemini-api-php/client
Gemini API PHP client does not come with an HTTP client.
If you are just testing or do not have an HTTP client library in your project,
you need to allow php-http/discovery
composer plugin or install a PSR-18 compatible client library.
How to use
Basic text generation
use GeminiAPI\Client;
use GeminiAPI\Resources\Parts\TextPart;
$client = new Client('GEMINI_API_KEY');
$response = $client->geminiPro()->generateContent(
new TextPart('PHP in less than 100 chars'),
);
print $response->text();
// PHP: A server-side scripting language used to create dynamic web applications.
// Easy to learn, widely used, and open-source.
Multimodal input
Image input modality is only enabled for Gemini Pro Vision model
use GeminiAPI\Client;
use GeminiAPI\Enums\MimeType;
use GeminiAPI\Resources\Parts\ImagePart;
use GeminiAPI\Resources\Parts\TextPart;
$client = new Client('GEMINI_API_KEY');
$response = $client->geminiProVision()->generateContent(
new TextPart('Explain what is in the image'),
new ImagePart(
MimeType::IMAGE_JPEG,
base64_encode(file_get_contents('elephpant.jpg')),
),
);
print $response->text();
// The image shows an elephant standing on the Earth.
// The elephant is made of metal and has a glowing symbol on its forehead.
// The Earth is surrounded by a network of glowing lines.
// The image is set against a starry background.
Chat Session (Multi-Turn Conversations)
use GeminiAPI\Client;
use GeminiAPI\Resources\Parts\TextPart;
$client = new Client('GEMINI_API_KEY');
$chat = $client->geminiPro()->startChat();
$response = $chat->sendMessage(new TextPart('Hello World in PHP'));
print $response->text();
$response = $chat->sendMessage(new TextPart('in Go'));
print $response->text();
<?php
echo "Hello World!";
?>
This code will print "Hello World!" to the standard output.
package main
import "fmt"
func main() {
fmt.Println("Hello World!")
}
This code will print "Hello World!" to the standard output.
Chat Session with history
use GeminiAPI\Client;
use GeminiAPI\Enums\Role;
use GeminiAPI\Resources\Content;
use GeminiAPI\Resources\Parts\TextPart;
$history = [
Content::text('Hello World in PHP', Role::User),
Content::text(
<<<TEXT
<?php
echo "Hello World!";
?>
This code will print "Hello World!" to the standard output.
TEXT,
Role::Model,
),
];
$client = new Client('GEMINI_API_KEY');
$chat = $client->geminiPro()
->startChat()
->withHistory($history);
$response = $chat->sendMessage(new TextPart('in Go'));
print $response->text();
package main
import "fmt"
func main() {
fmt.Println("Hello World!")
}
This code will print "Hello World!" to the standard output.
Streaming responses
Requires
curl
extension to be enabled
In the streaming response, the callback function will be called whenever a response is returned from the server.
Long responses may be broken into separate responses, and you can start receiving responses faster using a content stream.
use GeminiAPI\Client;
use GeminiAPI\Resources\Parts\TextPart;
use GeminiAPI\Responses\GenerateContentResponse;
$callback = function (GenerateContentResponse $response): void {
static $count = 0;
print "\nResponse #{$count}\n";
print $response->text();
$count++;
};
$client = new Client('GEMINI_API_KEY');
$client->geminiPro()->generateContentStream(
$callback,
[new TextPart('PHP in less than 100 chars')],
);
// Response #0
// PHP: a versatile, general-purpose scripting language for web development, popular for
// Response #1
// its simple syntax and rich library of functions.
Streaming Chat Session
Requires
curl
extension to be enabled
use GeminiAPI\Client;
use GeminiAPI\Enums\Role;
use GeminiAPI\Resources\Content;
use GeminiAPI\Resources\Parts\TextPart;
use GeminiAPI\Responses\GenerateContentResponse;
$history = [
Content::text('Hello World in PHP', Role::User),
Content::text(
<<<TEXT
<?php
echo "Hello World!";
?>
This code will print "Hello World!" to the standard output.
TEXT,
Role::Model,
),
];
$callback = function (GenerateContentResponse $response): void {
static $count = 0;
print "\nResponse #{$count}\n";
print $response->text();
$count++;
};
$client = new Client('GEMINI_API_KEY');
$chat = $client->geminiPro()
->startChat()
->withHistory($history);
$chat->sendMessageStream($callback, new TextPart('in Go'));
Response #0
package main
import "fmt"
func main() {
Response #1
fmt.Println("Hello World!")
}
This code will print "Hello World!" to the standard output.
Embed Content
use GeminiAPI\Client;
use GeminiAPI\Enums\ModelName;
use GeminiAPI\Resources\Parts\TextPart;
$client = new Client('GEMINI_API_KEY');
$response = $client->embeddingModel(ModelName::Embedding)
->embedContent(
new TextPart('PHP in less than 100 chars'),
);
print_r($response->embedding->values);
// [
// [0] => 0.041395925
// [1] => -0.017692696
// ...
// ]
Tokens counting
use GeminiAPI\Client;
use GeminiAPI\Resources\Parts\TextPart;
$client = new Client('GEMINI_API_KEY');
$response = $client->geminiPro()->countTokens(
new TextPart('PHP in less than 100 chars'),
);
print $response->totalTokens;
// 10
Listing models
use GeminiAPI\Client;
$client = new Client('GEMINI_API_KEY');
$response = $client->listModels();
print_r($response->models);
//[
// [0] => GeminiAPI\Resources\Model Object
// (
// [name] => models/gemini-pro
// [displayName] => Gemini Pro
// [description] => The best model for scaling across a wide range of tasks
// ...
// )
// [1] => GeminiAPI\Resources\Model Object
// (
// [name] => models/gemini-pro-vision
// [displayName] => Gemini Pro Vision
// [description] => The best image understanding model to handle a broad range of applications
// ...
// )
//]
Advanced Usages
Safety Settings and Generation Configuration
use GeminiAPI\Client;
use GeminiAPI\Enums\HarmCategory;
use GeminiAPI\Enums\HarmBlockThreshold;
use GeminiAPI\GenerationConfig;
use GeminiAPI\Resources\Parts\TextPart;
use GeminiAPI\SafetySetting;
$safetySetting = new SafetySetting(
HarmCategory::HARM_CATEGORY_HATE_SPEECH,
HarmBlockThreshold::BLOCK_LOW_AND_ABOVE,
);
$generationConfig = (new GenerationConfig())
->withCandidateCount(1)
->withMaxOutputTokens(40)
->withTemperature(0.5)
->withTopK(40)
->withTopP(0.6)
->withStopSequences(['STOP']);
$client = new Client('GEMINI_API_KEY');
$response = $client->geminiPro()
->withAddedSafetySetting($safetySetting)
->withGenerationConfig($generationConfig)
->generateContent(
new TextPart('PHP in less than 100 chars')
);
Using your own HTTP client
use GeminiAPI\Client as GeminiClient;
use GeminiAPI\Resources\Parts\TextPart;
use GuzzleHttp\Client as GuzzleClient;
$guzzle = new GuzzleClient([
'proxy' => 'http://localhost:8125',
]);
$client = new GeminiClient('GEMINI_API_KEY', $guzzle);
$response = $client->geminiPro()->generateContent(
new TextPart('PHP in less than 100 chars')
);
Using your own HTTP client for streaming responses
Requires
curl
extension to be enabled
Since streaming responses are fetched using curl
extension, they cannot use the custom HTTP client passed to the Gemini Client.
You need to pass a CurlHandler
if you want to override connection options.
The following curl options will be overwritten by the Gemini Client.
CURLOPT_URL
CURLOPT_POST
CURLOPT_POSTFIELDS
CURLOPT_WRITEFUNCTION
You can also pass the headers you want to be used in the requests.
use GeminiAPI\Client;
use GeminiAPI\Resources\Parts\TextPart;
use GeminiAPI\Responses\GenerateContentResponse;
$callback = function (GenerateContentResponse $response): void {
print $response->text();
};
$ch = curl_init();
curl_setopt($ch, \CURLOPT_PROXY, 'http://localhost:8125');
$client = new Client('GEMINI_API_KEY');
$client->withRequestHeaders([
'User-Agent' => 'My Gemini-backed app'
])
->geminiPro()
->generateContentStream(
$callback,
[new TextPart('PHP in less than 100 chars')],
$ch,
);