What I need is a local web server appending all the POSTed data to a text file. The actual idea is to implement this (Storing into file using JavaScript/GreaseMonkey). I think the fastest way is to use XAMPP. The problem is I have forgotten PHP many years ago and have no idea how to do this, though I believe it is easy (no error handling or security required, just a quick-and-dirty one-time solution).
Would you be so kind to suggest a code for this?