Add new RFID tag id on web

Hello everyone, please answer my question

I have an RFID RC522 project using the web with database recording.

I want to ask, can the new RFID tag ID code be registered on the web side and then the ID code is directly stored on the Arduino system without being declared in the Arduino IDE coding program?

Thank you very much

(deleted)

spycatcher2k:
Sure - add an SD card for storage or use EEPROM.

Can you explain more? I'm not too understand
Sorry I'm a newbie :'D

the ID code is directly stored on the Arduino system without being declared in the Arduino IDE coding program?

Please explain how you plan to read the ID code into the Arduino.

Once you have done that, store it however you like, for example as a variable, or write the ID code to EEPROM or an SD card.