Accessing RFID Tag via arduino uno with PHP

Hay, I have been searching about this topic but I don't find suitable answer. Actually, I want to make an wireless alarm and simple medical record with RFID tag as ID to access alarm and database. I use Arduino Uno which connect to PC (PC is connected to server by wireless router). I am not sure how to connect arduino uno with php without using ethernet shield and how to access RFID tag data from serial port via arduino to PHP.

Hope someone could help me :) Thank you so much