php-openaiHow to use OpenAI ChatGPT API with PHP?

OpenAI ChatGPT API can be used with PHP to create natural language processing applications.

Example code

<?php
$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "https://api.openai.com/v1/engines/chatbot/completions",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS =>"{\n  \"prompt\": \"Hello, how are you?\",\n  \"temperature\": 0.7,\n  \"max_tokens\": 50\n}",
  CURLOPT_HTTPHEADER => array(
    "Content-Type: application/json",
    "Authorization: Bearer <YOUR_API_KEY>"
  ),
));

$response = curl_exec($curl);

curl_close($curl);
echo $response;

Output example

{
  "choices": [
    {
      "text": "I'm doing great, thanks for asking!",
      "index": 0
    }
  ]
}

Code explanation

• curl_init(): Initializes a new cURL session
• curl_setopt_array(): Sets an array of options for a cURL transfer
• CURLOPT_URL: The URL to fetch
• CURLOPT_RETURNTRANSFER: TRUE to return the transfer as a string of the return value of curl_exec() instead of outputting it out directly
• CURLOPT_ENCODING: The contents of the "Accept-Encoding: " header. This enables decoding of the response
• CURLOPT_MAXREDIRS: The maximum amount of HTTP redirections to follow
• CURLOPT_TIMEOUT: The maximum number of seconds to allow cURL functions to execute
• CURLOPT_FOLLOWLOCATION: TRUE to follow any "Location: " header that the server sends as part of the HTTP header
• CURLOPT_HTTP_VERSION: CURL_HTTP_VERSION_1_1 (default) to use HTTP/1.1
• CURLOPT_CUSTOMREQUEST: The HTTP request method to use
• CURLOPT_POSTFIELDS: The full data to post in a HTTP "POST" operation
• CURLOPT_HTTPHEADER: An array of HTTP header fields to set, in the format array('Content-type: text/plain', 'Content-length: 100')
• curl_exec(): Performs a cURL session
• curl_close(): Closes a cURL session

Helpful links

• OpenAI ChatGPT API Documentation
• PHP cURL Documentation

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