Write ip to arduino from web site (PHP).

Gotta Make sure the new code and put it here later

my problem is that when I start to move the code that is working to put the exchange ip, it stops working.
I'm lost, because not know much about programming, my area is electronic,
you have a variable name that I will use to write the ip of the arduino alert page?
ex
would only include the

include <Ethernet.h>

include <SPI.h>

outeria to put some more ex # include <Client.h>

and a function that would write
EEPROM.write the void loop?

anything to start researching.
so I can understand how.
Thank you.