CURLOPT_KEEP_SENDING_ON_ERROR

CURLOPT_KEEP_SENDING_ON_ERROR is one of the accepted parameters for curl_setopt parameter #2.

CURLOPT_KEEP_SENDING_ON_ERROR — true to keep sending the request body if the HTTP code returned is equal to or larger than 300. The default action would be to stop sending and close the stream or connection. Suitable for manual NTLM authentication. Most applications do not need this option. Available as of PHP 7.3.0 and cURL 7.51.0

CURLOPT_KEEP_SENDING_ON_ERROR = 245;