How can I call the OpenAI API using PHP cURL for a WordPress plugin?

Below is an example PHP snippet using cURL to call the OpenAI completions API. Replace "your_openai_api_key" with your actual API key. You can include this in your WordPress plugin where needed.

PHPCopied
<?php
// Your OpenAI API key
$apiKey = 'your_openai_api_key';

// The API endpoint
$url = 'https://api.openai.com/v1/completions';

// Data payload, matching your bash example
$data = [
    'model' => 'text-davinci-002',
    'prompt' => "Write an article about: hi\n",
    'temperature' => 0.7,
    'max_tokens' => 256,
    'top_p' => 1,
    'frequency_penalty' => 0,
    'presence_penalty' => 0
];

// Convert the data to JSON
$payload = json_encode($data);

// Initialize cURL session
$ch = curl_init($url);

// Set cURL options
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/json',
    'Authorization: Bearer ' . $apiKey,
]);

// Execute the API request
$response = curl_exec($ch);

// Error handling
if ($response === false) {
    echo 'Curl error: ' . curl_error($ch);
} else {
    // Decode the API response
    $responseData = json_decode($response, true);
    print_r($responseData);
}

// Close the cURL session
curl_close($ch);
?>

How It Works

1. Initializing cURL: The script starts by initializing a cURL session with the target API endpoint.
2. Setting Headers & Payload: We set the HTTP headers, including the Content-Type and Authorization Bearer token. The payload is prepared as a JSON string, matching the parameters provided.
3. Executing the Request: The request is executed via curl_exec(). If an error occurs, it is printed; otherwise, the decoded API response is printed.
4. Closing cURL: Finally, the cURL session is closed.

This code can be adapted within a WordPress plugin context. You'll just need to adjust it to fit your plugin's structure and ensure proper handling of API keys and responses based on your needs.