PHP library for the OpenAI API

An unofficial library for OpenAI's API.

Requirements

• PHP 5.4.0 or above
• Composer
• An OpenAI API key

Quick set up

git clone git@github.com:ruscoe/openai-php.git

cd openai-php

composer install

Usage examples

The following examples assume you store your API key in an environment variable. To do this on a Linux or MacOS system, run:

export OPENAI_API_KEY=sk-XA0yN...

Be sure to substitute your own API key after OPENAI_API_KEY=.

Completions

This example asks the gpt-3.5-turbo model to describe a keyboard. It instructs the OpenAI API to use more than the default number of tokens so a reasonable length description can be returned.

<?php

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

// @see https://platform.openai.com/docs/api-reference/authentication
$api_key = getenv('OPENAI_API_KEY');

$api = new OpenAI\OpenAICompletions($api_key);

$parameters = [
    'max_tokens' => 128,
];

$response = $api->create('gpt-3.5-turbo', 'Describe a keyboard', 1, $parameters);

var_dump($response);

The response:

object(stdClass)#34 (6) {
  ["id"]=>
  string(34) "cmpl-7EqnVAO0xpxtWkDepi2s64AG7UAbU"
  ["object"]=>
  string(15) "text_completion"
  ["created"]=>
  int(1683773901)
  ["model"]=>
  string(16) "gpt-3.5-turbo"
  ["choices"]=>
  array(1) {
    [0]=>
    object(stdClass)#32 (4) {
      ["text"]=>
      string(663) "

A keyboard is a computer peripheral device used for entering data and commands into a computer or other device. It consists of a keypad, usually a set of standard-sized keys corresponding to letters, numbers, symbols, and/or functionality, which can be powered by various means including electricity, batteries, or solar cells. It generally has several special-function keys that can be used to control program functions, such as volume or brightness levels. Modern keyboards often include multimedia hotkeys, and are typically back-lit in order to make typing in the dark easier. Some keyboards may include a palm rest to help reduce fatigue caused by extended"
      ["index"]=>
      int(0)
      ["logprobs"]=>
      NULL
      ["finish_reason"]=>
      string(6) "length"
    }
  }
  ["usage"]=>
  object(stdClass)#18 (3) {
    ["prompt_tokens"]=>
    int(4)
    ["completion_tokens"]=>
    int(128)
    ["total_tokens"]=>
    int(132)
  }
}

Chat

This example sends a simple chat message.

<?php

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

// @see https://platform.openai.com/docs/api-reference/authentication
$api_key = getenv('OPENAI_API_KEY');

$api = new OpenAI\OpenAIChat($api_key);

$messages = [
    (object) ['role' => 'user', 'content' => 'Hello, friend!'],
];

$response = $api->create('gpt-3.5-turbo', $messages);

var_dump($response);

The response:

object(stdClass)#35 (6) {
  ["id"]=>
  string(38) "chatcmpl-7EqphlIJngrqxGAiDdtV9JMu89NhQ"
  ["object"]=>
  string(15) "chat.completion"
  ["created"]=>
  int(1683774037)
  ["model"]=>
  string(18) "gpt-3.5-turbo-0301"
  ["usage"]=>
  object(stdClass)#33 (3) {
    ["prompt_tokens"]=>
    int(12)
    ["completion_tokens"]=>
    int(10)
    ["total_tokens"]=>
    int(22)
  }
  ["choices"]=>
  array(1) {
    [0]=>
    object(stdClass)#29 (3) {
      ["message"]=>
      object(stdClass)#19 (2) {
        ["role"]=>
        string(9) "assistant"
        ["content"]=>
        string(40) "Hello there, how may I assist you today?"
      }
      ["finish_reason"]=>
      string(4) "stop"
      ["index"]=>
      int(0)
    }
  }
}

Images

Create image

This example asks for two images of a red six-sided dice in water.

<?php

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

// @see https://platform.openai.com/docs/api-reference/authentication
$api_key = getenv('OPENAI_API_KEY');

$api = new OpenAI\OpenAIImages($api_key);

$response = $api->createAsURL('A red six-sided dice in water', 2, '256x256');

The response

Create image variation

<?php

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

// @see https://platform.openai.com/docs/api-reference/authentication
$api_key = getenv('OPENAI_API_KEY');

$api = new OpenAI\OpenAIImages($api_key);

$response = $api->createVariationAsURL('variation.png', 1, '256x256');

The source and response

Create image edit

<?php

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

// @see https://platform.openai.com/docs/api-reference/authentication
$api_key = getenv('OPENAI_API_KEY');

$api = new OpenAI\OpenAIImages($api_key);

$response = $api->createEditAsURL('edit.png', 'a duck driving a car', 'edit_mask.png', 1, '256x256');

The source and response

Fine-tuning a model

First, take a look at the official documentation on fine-tuning.

Create and upload your training file. Example:

training.jsonl

{"prompt": "bird =", "completion": " animal"}
{"prompt": "dog =", "completion": " animal"}
{"prompt": "cat =", "completion": " animal"}
{"prompt": "limestone =", "completion": " rock"}
{"prompt": "shale =", "completion": " rock"}
{"prompt": "marble =", "completion": " rock"}

<?php

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

// @see https://platform.openai.com/docs/api-reference/authentication
$api_key = getenv('OPENAI_API_KEY');

$api = new OpenAI\OpenAIFiles($api_key);

$file = $api->uploadFile('training.jsonl');

List your files to get the file ID:

$api = new OpenAI\OpenAIFiles($api_key);

$files = $api->getFiles();

var_dump($files);

Create a new training job using the file ID you've obtained:

$api = new OpenAI\OpenAIFineTunes($api_key);

$api->create('file-1CO...');

List models to get the name of your new fine-tuned model:

$api = new OpenAI\OpenAIModels($api_key);

$models = $api->getModels();

var_dump($models);

The model name will start with curie:ft and end with the current date and time.

Create a new completion using your fine-tuned model.

$api = new OpenAI\OpenAICompletions($api_key);

$response = $api->create('curie:ft...', 'dog =', 1, $parameters);

The response should include "animal".

$api = new OpenAI\OpenAICompletions($api_key);

$response = $api->create('curie:ft...', 'marble =', 1, $parameters);

The response should include "rock".

Available functions

Models

Class	Function	Description
OpenAIModels	getModels	Gets available OpenAI models.
OpenAIModels	getModel	Gets a specific OpenAI model.

Completions

Class	Function	Description
OpenAICompletions	create	Creates one or more completions from a given input.

Chat

Class	Function	Description
OpenAIChat	create	Creates one or more completions from a chat conversation.

Edits

Class	Function	Description
OpenAIEdits	create	Performs an edit on a given input.

Images

Class	Function	Description
OpenAIImages	createAsURL	Generates a number of images and returns URLs.
OpenAIImages	createAsBase64	Generates a number of images and returns Base64 encoded image(s).
OpenAIImages	createVariationAsURL	Generates a number of image variations and returns URL(s).
OpenAIImages	createVariationAsBase64	Generates a number of image variations and returns Base64 encoded image(s).
OpenAIImages	createVariation	Generates a number of image variations from a given image.
OpenAIImages	createEditAsURL	Generates a number of image edits and returns URL(s).
OpenAIImages	createEditAsBase64	Generates a number of image edits and returns Base64 encoded image(s).
OpenAIImages	createEdit	Generates a number of image edits from a given image.

Embeddings

Class	Function	Description
OpenAIEmbeddings	create	Creates an embedding vector from given input.

Audio

Class	Function	Description
OpenAIAudio	transcribe	Transcribes text from an audio file.

Files

Class	Function	Description
OpenAIFiles	getFiles	Gets files owned by the user's organization.
OpenAIFiles	uploadFile	Uploads a file.
OpenAIFiles	deleteFile	Deletes a file.
OpenAIFiles	getFile	Gets information about a file.
OpenAIFiles	getFileContent	Gets the content of a file.

Fine-Tunes

Class	Function	Description
OpenAIFineTunes	create	Creates a fine-tune job.
OpenAIFineTunes	getFineTunes	Gets existing fine-tunes.
OpenAIFineTunes	cancelFineTune	Cancels a fine-tune job.
OpenAIFineTunes	getFineTuneEvents	Gets status updates of a fine-tune job.
OpenAIFineTunes	deleteModel	Deletes a fine-tuned model.

Moderations

Class	Function	Description
OpenAIModerations	create	Requests a moderation result from OpenAI.

License

MIT