Connecting an arduino to a computer and using the computer as a server?

Question

Arduino

Rfid is connected to the arduino, and arduino is connected to the computer, how to make it so that when the card is presented, this data is sent to the server?

Answer 1

on Arduino received card ID - recorded in serial.
on your computer - listen to the comport.
if you need to send over the network - plug in the Ethernet shield, run Ethernet.client on the arduino, connect to the server - and GET myserver/rfid.php?id=0123456789012345.