Pipe netcat response to php post form

Question

I'm trying to get a one-line command that pipes all messages on a port to a php script. I can't use a netcat proxy, as the receiving end is webserver-only.

Basically, I have the idea of doing something like this:

nc -d localhost 30003 | curl -d @- https://URL/file.php

How would I actually do this? Such that all messages from the nc connection are sent to the php script. On a per message basis (Curl request for every line of nc received) Preferably without waiting for the curl to finish, to allow for large amounts of messages to continuously send.