# Making calls to OpenAI chatGPT / GPT-3 API in PHP

This article walks you through with sampel code on how to call OpenAI chatGPT / GPT-3 API in PHP. It covers below topics:

*   Install php package for openai
*   set up environment variables
*   import the php package
*   call the gpt-3 api

Let’s start.

Table of Contents

*   [Install the php package for calling OpenAI API](https://harishgarg.com/#Install_the_php_package_for_calling_OpenAI_API)
*   [Calling the chatGPT / GPT-3 API from php – code](https://harishgarg.com/#Calling_the_chatGPT_GPT-3_API_from_php_-_code)
*   [Conclusion](https://harishgarg.com/#Conclusion)

Install the php package for calling OpenAI API
==============================================

OpenAI has not relased an official package for calling the GPT-3 API from php. However, there is a popular [3rd party php package](https://github.com/orhanerday/open-ai/?ref=harishgarg.com) that OpenAI recommends for this purpose.

In order to install the package, use below command.  
composer require orhanerday/open-ai

Calling the chatGPT / GPT-3 API from php – code
===============================================

Import the package in your code.  
use Orhanerday\\OpenAi\\OpenAi;

Add the OpenAI API key to your environment as `OPEN_AI_API_KEY`. You can get your API key from your OpenAI account.

Next, load the openai API key from your environment  
$open\_ai = new OpenAi(env(‘OPEN\_AI\_API\_KEY’));

Now we are ready to make our first call to OpenAI

    $complete = $open_ai->complete([
        'engine' => 'davinci',
        'prompt' => 'Hello',
        'temperature' => 0.7,
        'max_tokens' => 276,
        'frequency_penalty' => 0,
        'presence_penalty' => 0.6,
    ]);

The above code makes a call to the OpenAI GPT-3 completions endpoint. Completions endpoint is used for text generation.

Explanation for the parameters is as below:

*   engine: The engine to use for completion.
*   prompt: The prompt to complete.
*   temperature: The temperature to use for sampling.
*   max\_tokens: The maximum number of tokens to return.
*   frequency\_penalty: The penalty to apply to words that appear frequently in – the prompt.
*   presence\_penalty: The penalty to apply to words that appear in the prompt.

Conclusion
==========

This was a short how to on calling OpenAI chatGPT / GPT-3 API endpoints from php. We showed an example of a text generation call using davinci engine. Good luck with building your GPT-3 product in PHP.

Stick around and read more GPT-3 articles.