I have searched everywhere and I can't find any information about this.
I have a form that someone fills out on SITE A and then an email goes out with a reference number attached. My problem is I have another site B that has a form that does the same thing...but it needs to access the same simple text file with the ref.# on site A. It is no problem to read it but after that it needs to add 1 to the number and write the new ref# to site A. So really I just need to know how to write to a text file from one domain to the other.
This post might be a little off topic but I am just asking since I was responding to the person who just replied to me...and IM VERY DESPERATE!