OpenAI API Call in PHP with cURL

$curl = curl_init();

curl_setopt_array($curl, array(

  CURLOPT_URL => "https://api.openai.com/v1/engines/davinci/completions",

  CURLOPT_RETURNTRANSFER => true,

  CURLOPT_ENCODING => "",

  CURLOPT_MAXREDIRS => 10,

  CURLOPT_TIMEOUT => 30,

  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,

  CURLOPT_CUSTOMREQUEST => "POST",

  CURLOPT_POSTFIELDS => "{\n  \"prompt\": \"The quick brown fox\",\n  \"max_tokens\": 50\n}",

  CURLOPT_HTTPHEADER => array(

    "Authorization: Bearer <YOUR_API_KEY>",

    "Content-Type: application/json"

  ),

));

$response = curl_exec($curl);

$err = curl_error($curl);

curl_close($curl);

if ($err) {

  echo "cURL Error #:" . $err;

} else {

  echo $response;

}