I think I understood how it works, though I would have a question, how do you send the value of your variable (for e.g score, it is a construct 2 variable) to your php file with the ajax command ? In your example, you just request "post.php?name=NEWENTRY?score=1337", how can you send instead values of construct variables ?
Would something like "post.php?name=&name?score=&score" work ? Cause it seems to me that you can just send arbitrary values to your php file and not really variable values.
Please excuse my poor English.