CURLOPT_POSTFIELDS has a length or size limit?

Question

I want to send with an API some POST data with a large information data from server a to server b. Into server b, I receive only a par

Answer 1

Sending data via POST does not have a limit except for the one you have set in your server (php_value post_max_size 400M);

you might want to check your timeout value, try increasing your current value:

curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 60);
curl_setopt($ch, CURLOPT_TIMEOUT, 60);

This might be closing your connection in server A before the entire request is sent to the server B.